[ECO "A00"]
[Opening "Polish (Sokolsky) opening"]

b4 *

[ECO "A00"]
[Opening "Polish"]
[Variation "Tübingen variation"]

b4 Nh6 *

[ECO "A00"]
[Opening "Polish"]
[Variation "Outflank variation"]

b4 c6 *

[ECO "A00"]
[Opening "Benko's opening"]

g3 *

[ECO "A00"]
[Opening "Lasker simul special"]

g3 h5 *

[ECO "A00"]
[Opening "Benko's opening"]
[Variation "reversed Alekhine"]

g3 e5 Nf3 *

[ECO "A00"]
[Opening "Grob's attack"]

g4 *

[ECO "A00"]
[Opening "Grob"]
[Variation "spike attack"]

g4 d5 Bg2 c6 g5 *

[ECO "A00"]
[Opening "Grob"]
[Variation "Fritz gambit"]

g4 d5 Bg2 Bxg4 c4 *

[ECO "A00"]
[Opening "Grob"]
[Variation "Romford counter-gambit"]

g4 d5 Bg2 Bxg4 c4 d4 *

[ECO "A00"]
[Opening "Clemenz (Mead's, Basman's or de Klerk's) opening"]

h3 *

[ECO "A00"]
[Opening "Global opening"]

h3 e5 a3 *

[ECO "A00"]
[Opening "Amar (Paris) opening"]

Nh3 *

[ECO "A00"]
[Opening "Amar gambit"]

Nh3 d5 g3 e5 f4 Bxh3 Bxh3 exf4 *

[ECO "A00"]
[Opening "Dunst (Sleipner, Heinrichsen) opening"]

Nc3 *

[ECO "A00"]
[Opening "Dunst (Sleipner, Heinrichsen) opening"]

Nc3 e5 *

[ECO "A00"]
[Opening "Battambang opening"]

Nc3 e5 a3 *

[ECO "A00"]
[Opening "Novosibirsk opening"]

Nc3 c5 d4 cxd4 Qxd4 Nc6 Qh4 *

[ECO "A00"]
[Opening "Anderssen's opening"]

a3 *

[ECO "A00"]
[Opening "Ware (Meadow Hay) opening"]

a4 *

[ECO "A00"]
[Opening "Crab opening"]

a4 e5 h4 *

[ECO "A00"]
[Opening "Saragossa opening"]

c3 *

[ECO "A00"]
[Opening "Mieses opening"]

d3 *

[ECO "A00"]
[Opening "Mieses opening"]

d3 e5 *

[ECO "A00"]
[Opening "Valencia opening"]

d3 e5 Nd2 *

[ECO "A00"]
[Opening "Venezolana opening"]

d3 c5 Nc3 Nc6 g3 *

[ECO "A00"]
[Opening "Van't Kruijs opening"]

e3 *

[ECO "A00"]
[Opening "Amsterdam attack"]

e3 e5 c4 d6 Nc3 Nc6 b3 Nf6 *

[ECO "A00"]
[Opening "Gedult's opening"]

f3 *

[ECO "A00"]
[Opening "Hammerschlag (Fried fox/Pork chop opening)"]

f3 e5 Kf2 *

[ECO "A00"]
[Opening "Anti-Borg (Desprez) opening"]

h4 *

[ECO "A00"]
[Opening "Durkin's attack"]

Na3 *

[ECO "A01"]
[Opening "Nimzovich-Larsen attack"]

b3 *

[ECO "A01"]
[Opening "Nimzovich-Larsen attack"]
[Variation "modern variation"]

b3 e5 *

[ECO "A01"]
[Opening "Nimzovich-Larsen attack"]
[Variation "Indian variation"]

b3 Nf6 *

[ECO "A01"]
[Opening "Nimzovich-Larsen attack"]
[Variation "classical variation"]

b3 d5 *

[ECO "A01"]
[Opening "Nimzovich-Larsen attack"]
[Variation "English variation"]

b3 c5 *

[ECO "A01"]
[Opening "Nimzovich-Larsen attack"]
[Variation "Dutch variation"]

b3 f5 *

[ECO "A01"]
[Opening "Nimzovich-Larsen attack"]
[Variation "Polish variation"]

b3 b5 *

[ECO "A01"]
[Opening "Nimzovich-Larsen attack"]
[Variation "symmetrical variation"]

b3 b6 *

[ECO "A02"]
[Opening "Bird's opening"]

f4 *

[ECO "A02"]
[Opening "Bird"]
[Variation "From gambit"]

f4 e5 *

[ECO "A02"]
[Opening "Bird"]
[Variation "From gambit, Lasker variation"]

f4 e5 fxe5 d6 exd6 Bxd6 Nf3 g5 *

[ECO "A02"]
[Opening "Bird"]
[Variation "From gambit, Lipke variation"]

f4 e5 fxe5 d6 exd6 Bxd6 Nf3 Nh6 d4 *

[ECO "A02"]
[Opening "Bird's opening, Swiss gambit"]

f4 f5 e4 fxe4 Nc3 Nf6 g4 *

[ECO "A02"]
[Opening "Bird"]
[Variation "Hobbs gambit"]

f4 g5 *

[ECO "A03"]
[Opening "Bird's opening"]

f4 d5 *

[ECO "A03"]
[Opening "Mujannah opening"]

f4 d5 c4 *

[ECO "A03"]
[Opening "Bird's opening"]
[Variation "Williams gambit"]

f4 d5 e4 *

[ECO "A03"]
[Opening "Bird's opening"]
[Variation "Lasker variation"]

f4 d5 Nf3 Nf6 e3 c5 *

[ECO "A04"]
[Opening "Reti opening"]

Nf3 *

[ECO "A04"]
[Opening "Reti v Dutch"]

Nf3 f5 *

[ECO "A04"]
[Opening "Reti"]
[Variation "Pirc-Lisitsin gambit"]

Nf3 f5 e4 *

[ECO "A04"]
[Opening "Reti"]
[Variation "Lisitsin gambit deferred"]

Nf3 f5 d3 Nf6 e4 *

[ECO "A04"]
[Opening "Reti opening"]

Nf3 d6 *

[ECO "A04"]
[Opening "Reti"]
[Variation "Wade defence"]

Nf3 d6 e4 Bg4 *

[ECO "A04"]
[Opening "Reti"]
[Variation "Herrström gambit"]

Nf3 g5 *

[ECO "A05"]
[Opening "Reti opening"]

Nf3 Nf6 *

[ECO "A05"]
[Opening "Reti"]
[Variation "King's Indian attack, Spassky's variation"]

Nf3 Nf6 g3 b5 *

[ECO "A05"]
[Opening "Reti"]
[Variation "King's Indian attack"]

Nf3 Nf6 g3 g6 *

[ECO "A05"]
[Opening "Reti"]
[Variation "King's Indian attack, Reti-Smyslov variation"]

Nf3 Nf6 g3 g6 b4 *

[ECO "A06"]
[Opening "Reti opening"]

Nf3 d5 *

[ECO "A06"]
[Opening "Reti"]
[Variation "old Indian attack"]

Nf3 d5 d3 *

[ECO "A06"]
[Opening "Santasiere's folly"]

Nf3 d5 b4 *

[ECO "A06"]
[Opening "Tennison (Lemberg, Zukertort) gambit"]

Nf3 d5 e4 *

[ECO "A06"]
[Opening "Reti"]
[Variation "Nimzovich-Larsen attack"]

Nf3 d5 b3 *

[ECO "A07"]
[Opening "Reti"]
[Variation "King's Indian attack (Barcza system)"]

Nf3 d5 g3 *

[ECO "A07"]
[Opening "Reti"]
[Variation "King's Indian attack, Yugoslav variation"]

Nf3 d5 g3 Nf6 Bg2 c6 O-O Bg4 *

[ECO "A07"]
[Opening "Reti"]
[Variation "King's Indian attack, Keres variation"]

Nf3 d5 g3 Bg4 Bg2 Nd7 *

[ECO "A07"]
[Opening "Reti"]
[Variation "King's Indian attack"]

Nf3 d5 g3 g6 *

[ECO "A07"]
[Opening "Reti"]
[Variation "King's Indian attack, Pachman system"]

Nf3 d5 g3 g6 Bg2 Bg7 O-O e5 d3 Ne7 *

[ECO "A07"]
[Opening "Reti"]
[Variation "King's Indian attack (with ...c5)"]

Nf3 d5 g3 c5 *

[ECO "A08"]
[Opening "Reti"]
[Variation "King's Indian attack"]

Nf3 d5 g3 c5 Bg2 *

[ECO "A08"]
[Opening "Reti"]
[Variation "King's Indian attack, French variation"]

Nf3 d5 g3 c5 Bg2 Nc6 O-O e6 d3 Nf6 Nbd2 Be7 e4 O-O Re1 *

[ECO "A09"]
[Opening "Reti opening"]

Nf3 d5 c4 *

[ECO "A09"]
[Opening "Reti"]
[Variation "advance variation"]

Nf3 d5 c4 d4 *

[ECO "A09"]
[Opening "Reti accepted"]

Nf3 d5 c4 dxc4 *

[ECO "A09"]
[Opening "Reti accepted"]
[Variation "Keres variation"]

Nf3 d5 c4 dxc4 e3 Be6 *

[ECO "A10"]
[Opening "English opening"]

c4 *

[ECO "A10"]
[Opening "English opening"]

c4 g6 *

[ECO "A10"]
[Opening "English"]
[Variation "Adorjan defence"]

c4 g6 e4 e5 *

[ECO "A10"]
[Opening "English"]
[Variation "Jaenisch gambit"]

c4 b5 *

[ECO "A10"]
[Opening "English"]
[Variation "Anglo-Dutch defence"]

c4 f5 *

[ECO "A11"]
[Opening "English"]
[Variation "Caro-Kann defensive system"]

c4 c6 *

[ECO "A12"]
[Opening "English"]
[Variation "Caro-Kann defensive system"]

c4 c6 Nf3 d5 b3 *

[ECO "A12"]
[Opening "English"]
[Variation "Torre defensive system"]

c4 c6 Nf3 d5 b3 Nf6 g3 Bg4 *

[ECO "A12"]
[Opening "English"]
[Variation "London defensive system"]

c4 c6 Nf3 d5 b3 Nf6 g3 Bf5 *

[ECO "A12"]
[Opening "English"]
[Variation "Caro-Kann defensive system"]

c4 c6 Nf3 d5 b3 Nf6 Bb2 *

[ECO "A12"]
[Opening "English"]
[Variation "Bled variation"]

c4 c6 Nf3 d5 b3 Nf6 Bb2 g6 *

[ECO "A12"]
[Opening "English"]
[Variation "New York (London) defensive system"]

c4 c6 Nf3 d5 b3 Nf6 Bb2 Bf5 *

[ECO "A12"]
[Opening "English"]
[Variation "Capablanca's variation"]

c4 c6 Nf3 d5 b3 Nf6 Bb2 Bg4 *

[ECO "A12"]
[Opening "English"]
[Variation "Caro-Kann defensive system, Bogolyubov variation"]

c4 c6 Nf3 d5 b3 Bg4 *

[ECO "A13"]
[Opening "English opening"]

c4 e6 *

[ECO "A13"]
[Opening "English"]
[Variation "Romanishin gambit"]

c4 e6 Nf3 Nf6 g3 a6 Bg2 b5 *

[ECO "A13"]
[Opening "English opening"]
[Variation "Agincourt variation"]

c4 e6 Nf3 d5 *

[ECO "A13"]
[Opening "English"]
[Variation "Wimpey system"]

c4 e6 Nf3 d5 b3 Nf6 Bb2 c5 e3 *

[ECO "A13"]
[Opening "English opening"]
[Variation "Agincourt variation"]

c4 e6 Nf3 d5 g3 *

[ECO "A13"]
[Opening "English"]
[Variation "Kurajica defence"]

c4 e6 Nf3 d5 g3 c6 *

[ECO "A13"]
[Opening "English"]
[Variation "Neo-Catalan"]

c4 e6 Nf3 d5 g3 Nf6 *

[ECO "A13"]
[Opening "English"]
[Variation "Neo-Catalan accepted"]

c4 e6 Nf3 d5 g3 Nf6 Bg2 dxc4 *

[ECO "A14"]
[Opening "English"]
[Variation "Neo-Catalan declined"]

c4 e6 Nf3 d5 g3 Nf6 Bg2 Be7 O-O *

[ECO "A14"]
[Opening "English"]
[Variation "Symmetrical, Keres defence"]

c4 e6 Nf3 d5 g3 Nf6 Bg2 Be7 O-O c5 cxd5 Nxd5 Nc3 Nc6 *

[ECO "A15"]
[Opening "English, 1...Nf6 (Anglo-Indian defence)"]

c4 Nf6 *

[ECO "A15"]
[Opening "English orangutan"]

c4 Nf6 b4 *

[ECO "A15"]
[Opening "English opening"]

c4 Nf6 Nf3 *

[ECO "A16"]
[Opening "English opening"]

c4 Nf6 Nc3 *

[ECO "A16"]
[Opening "English"]
[Variation "Anglo-Grünfeld defence"]

c4 Nf6 Nc3 d5 *

[ECO "A16"]
[Opening "English"]
[Variation "Anglo-Grünfeld, Smyslov defence"]

c4 Nf6 Nc3 d5 cxd5 Nxd5 g3 g6 Bg2 Nxc3 *

[ECO "A16"]
[Opening "English"]
[Variation "Anglo-Grünfeld, Czech defence"]

c4 Nf6 Nc3 d5 cxd5 Nxd5 g3 g6 Bg2 Nb6 *

[ECO "A16"]
[Opening "English"]
[Variation "Anglo-Grünfeld defence"]

c4 Nf6 Nc3 d5 cxd5 Nxd5 Nf3 *

[ECO "A16"]
[Opening "English"]
[Variation "Anglo-Grünfeld defence, Korchnoi variation"]

c4 Nf6 Nc3 d5 cxd5 Nxd5 Nf3 g6 g3 Bg7 Bg2 e5 *

[ECO "A17"]
[Opening "English opening"]

c4 Nf6 Nc3 e6 *

[ECO "A17"]
[Opening "English"]
[Variation "Queens Indian formation"]

c4 Nf6 Nc3 e6 Nf3 b6 *

[ECO "A17"]
[Opening "English"]
[Variation "Queens Indian, Romanishin variation"]

c4 Nf6 Nc3 e6 Nf3 b6 e4 Bb7 Bd3 *

[ECO "A17"]
[Opening "English"]
[Variation "Nimzo-English opening"]

c4 Nf6 Nc3 e6 Nf3 Bb4 *

[ECO "A18"]
[Opening "English"]
[Variation "Mikenas-Carls variation"]

c4 Nf6 Nc3 e6 e4 *

[ECO "A18"]
[Opening "English"]
[Variation "Mikenas-Carls, Flohr variation"]

c4 Nf6 Nc3 e6 e4 d5 e5 *

[ECO "A18"]
[Opening "English"]
[Variation "Mikenas-Carls, Kevitz variation"]

c4 Nf6 Nc3 e6 e4 Nc6 *

[ECO "A19"]
[Opening "English"]
[Variation "Mikenas-Carls, Sicilian variation"]

c4 Nf6 Nc3 e6 e4 c5 *

[ECO "A20"]
[Opening "English opening"]

c4 e5 *

[ECO "A20"]
[Opening "English, Nimzovich variation"]

c4 e5 Nf3 *

[ECO "A20"]
[Opening "English, Nimzovich, Flohr variation"]

c4 e5 Nf3 e4 *

[ECO "A21"]
[Opening "English opening"]

c4 e5 Nc3 *

[ECO "A21"]
[Opening "English, Tröger defence"]

c4 e5 Nc3 d6 g3 Be6 Bg2 Nc6 *

[ECO "A21"]
[Opening "English, Keres variation"]

c4 e5 Nc3 d6 g3 c6 *

[ECO "A21"]
[Opening "English opening"]

c4 e5 Nc3 d6 Nf3 *

[ECO "A21"]
[Opening "English, Smyslov defence"]

c4 e5 Nc3 d6 Nf3 Bg4 *

[ECO "A21"]
[Opening "English, Kramnik-Shirov counterattack"]

c4 e5 Nc3 Bb4 *

[ECO "A22"]
[Opening "English opening"]

c4 e5 Nc3 Nf6 *

[ECO "A22"]
[Opening "English"]
[Variation "Bellon gambit"]

c4 e5 Nc3 Nf6 Nf3 e4 Ng5 b5 *

[ECO "A22"]
[Opening "English"]
[Variation "Carls' Bremen system"]

c4 e5 Nc3 Nf6 g3 *

[ECO "A22"]
[Opening "English"]
[Variation "Bremen, reverse dragon"]

c4 e5 Nc3 Nf6 g3 d5 *

[ECO "A22"]
[Opening "English"]
[Variation "Bremen, Smyslov system"]

c4 e5 Nc3 Nf6 g3 Bb4 *

[ECO "A23"]
[Opening "English"]
[Variation "Bremen system, Keres variation"]

c4 e5 Nc3 Nf6 g3 c6 *

[ECO "A24"]
[Opening "English"]
[Variation "Bremen system with ...g6"]

c4 e5 Nc3 Nf6 g3 g6 *

[ECO "A25"]
[Opening "English"]
[Variation "Sicilian reversed"]

c4 e5 Nc3 Nc6 *

[ECO "A25"]
[Opening "English"]
[Variation "closed system"]

c4 e5 Nc3 Nc6 g3 g6 Bg2 Bg7 *

[ECO "A25"]
[Opening "English"]
[Variation "closed, Taimanov variation"]

c4 e5 Nc3 Nc6 g3 g6 Bg2 Bg7 e3 d6 Nge2 Nh6 *

[ECO "A25"]
[Opening "English"]
[Variation "closed, Hort variation"]

c4 e5 Nc3 Nc6 g3 g6 Bg2 Bg7 e3 d6 Nge2 Be6 *

[ECO "A25"]
[Opening "English"]
[Variation "closed, 5.Rb1"]

c4 e5 Nc3 Nc6 g3 g6 Bg2 Bg7 Rb1 *

[ECO "A25"]
[Opening "English"]
[Variation "closed, 5.Rb1 Taimanov variation"]

c4 e5 Nc3 Nc6 g3 g6 Bg2 Bg7 Rb1 Nh6 *

[ECO "A25"]
[Opening "English"]
[Variation "closed system (without ...d6)"]

c4 e5 Nc3 Nc6 g3 g6 Bg2 Bg7 d3 *

[ECO "A26"]
[Opening "English"]
[Variation "closed system"]

c4 e5 Nc3 Nc6 g3 g6 Bg2 Bg7 d3 d6 *

[ECO "A26"]
[Opening "English"]
[Variation "Botvinnik system"]

c4 e5 Nc3 Nc6 g3 g6 Bg2 Bg7 d3 d6 e4 *

[ECO "A27"]
[Opening "English"]
[Variation "three knights system"]

c4 e5 Nc3 Nc6 Nf3 *

[ECO "A28"]
[Opening "English"]
[Variation "four knights system"]

c4 e5 Nc3 Nc6 Nf3 Nf6 *

[ECO "A28"]
[Opening "English"]
[Variation "Nenarokov variation"]

c4 e5 Nc3 Nc6 Nf3 Nf6 d4 exd4 Nxd4 Bb4 Bg5 h6 Bh4 Bxc3+ bxc3 Ne5 *

[ECO "A28"]
[Opening "English"]
[Variation "Bradley Beach variation"]

c4 e5 Nc3 Nc6 Nf3 Nf6 d4 e4 *

[ECO "A28"]
[Opening "English"]
[Variation "four knights, Nimzovich variation"]

c4 e5 Nc3 Nc6 Nf3 Nf6 e4 *

[ECO "A28"]
[Opening "English"]
[Variation "four knights, Marini variation"]

c4 e5 Nc3 Nc6 Nf3 Nf6 a3 *

[ECO "A28"]
[Opening "English"]
[Variation "four knights, Capablanca variation"]

c4 e5 Nc3 Nc6 Nf3 Nf6 d3 *

[ECO "A28"]
[Opening "English"]
[Variation "four knights, 4.e3"]

c4 e5 Nc3 Nc6 Nf3 Nf6 e3 *

[ECO "A28"]
[Opening "English"]
[Variation "four knights, Stean variation"]

c4 e5 Nc3 Nc6 Nf3 Nf6 e3 Bb4 Qc2 O-O Nd5 Re8 Qf5 *

[ECO "A28"]
[Opening "English"]
[Variation "four knights, Romanishin variation"]

c4 e5 Nc3 Nc6 Nf3 Nf6 e3 Bb4 Qc2 Bxc3 *

[ECO "A29"]
[Opening "English"]
[Variation "four knights, kingside fianchetto"]

c4 e5 Nc3 Nc6 Nf3 Nf6 g3 *

[ECO "A30"]
[Opening "English"]
[Variation "symmetrical variation"]

c4 c5 *

[ECO "A30"]
[Opening "English"]
[Variation "symmetrical, hedgehog system"]

c4 c5 Nf3 Nf6 g3 b6 Bg2 Bb7 O-O e6 Nc3 Be7 *

[ECO "A30"]
[Opening "English"]
[Variation "symmetrical, hedgehog, flexible formation"]

c4 c5 Nf3 Nf6 g3 b6 Bg2 Bb7 O-O e6 Nc3 Be7 d4 cxd4 Qxd4 d6 Rd1 a6 b3 Nbd7 *

[ECO "A31"]
[Opening "English"]
[Variation "symmetrical, Benoni formation"]

c4 c5 Nf3 Nf6 d4 *

[ECO "A32"]
[Opening "English"]
[Variation "symmetrical variation"]

c4 c5 Nf3 Nf6 d4 cxd4 Nxd4 e6 *

[ECO "A33"]
[Opening "English"]
[Variation "symmetrical variation"]

c4 c5 Nf3 Nf6 d4 cxd4 Nxd4 e6 Nc3 Nc6 *

[ECO "A33"]
[Opening "English"]
[Variation "symmetrical, Geller variation"]

c4 c5 Nf3 Nf6 d4 cxd4 Nxd4 e6 Nc3 Nc6 g3 Qb6 *

[ECO "A34"]
[Opening "English"]
[Variation "symmetrical variation"]

c4 c5 Nc3 *

[ECO "A34"]
[Opening "English"]
[Variation "symmetrical, three knights system"]

c4 c5 Nc3 Nf6 Nf3 d5 cxd5 Nxd5 *

[ECO "A34"]
[Opening "English"]
[Variation "symmetrical variation"]

c4 c5 Nc3 Nf6 g3 *

[ECO "A34"]
[Opening "English"]
[Variation "symmetrical, Rubinstein system"]

c4 c5 Nc3 Nf6 g3 d5 cxd5 Nxd5 Bg2 Nc7 *

[ECO "A35"]
[Opening "English"]
[Variation "symmetrical variation"]

c4 c5 Nc3 Nc6 *

[ECO "A35"]
[Opening "English"]
[Variation "symmetrical, four knights system"]

c4 c5 Nc3 Nc6 Nf3 Nf6 *

[ECO "A36"]
[Opening "English"]
[Variation "symmetrical variation"]

c4 c5 Nc3 Nc6 g3 *

[ECO "A36"]
[Opening "English"]
[Variation "ultra-symmetrical variation"]

c4 c5 Nc3 Nc6 g3 g6 Bg2 Bg7 *

[ECO "A36"]
[Opening "English"]
[Variation "symmetrical, Botvinnik system reversed"]

c4 c5 Nc3 Nc6 g3 g6 Bg2 Bg7 e3 e5 *

[ECO "A36"]
[Opening "English"]
[Variation "symmetrical, Botvinnik system"]

c4 c5 Nc3 Nc6 g3 g6 Bg2 Bg7 e4 *

[ECO "A37"]
[Opening "English"]
[Variation "symmetrical variation"]

c4 c5 Nc3 Nc6 g3 g6 Bg2 Bg7 Nf3 *

[ECO "A37"]
[Opening "English"]
[Variation "symmetrical, Botvinnik system reversed"]

c4 c5 Nc3 Nc6 g3 g6 Bg2 Bg7 Nf3 e5 *

[ECO "A38"]
[Opening "English"]
[Variation "symmetrical variation"]

c4 c5 Nc3 Nc6 g3 g6 Bg2 Bg7 Nf3 Nf6 *

[ECO "A38"]
[Opening "English"]
[Variation "symmetrical, main line with d3"]

c4 c5 Nc3 Nc6 g3 g6 Bg2 Bg7 Nf3 Nf6 O-O O-O d3 *

[ECO "A38"]
[Opening "English"]
[Variation "symmetrical, main line with b3"]

c4 c5 Nc3 Nc6 g3 g6 Bg2 Bg7 Nf3 Nf6 O-O O-O b3 *

[ECO "A39"]
[Opening "English"]
[Variation "symmetrical, main line with d4"]

c4 c5 Nc3 Nc6 g3 g6 Bg2 Bg7 Nf3 Nf6 O-O O-O d4 *

[ECO "A40"]
[Opening "Queen's pawn"]

d4 *

[ECO "A40"]
[Opening "Queen's pawn"]
[Variation "Lundin (Kevitz-Mikenas) defence"]

d4 Nc6 *

[ECO "A40"]
[Opening "Queen's pawn"]
[Variation "Charlick (Englund) gambit"]

d4 e5 *

[ECO "A40"]
[Opening "Queen's pawn"]
[Variation "Englund gambit"]

d4 e5 dxe5 Nc6 Nf3 Qe7 Qd5 f6 exf6 Nxf6 *

[ECO "A40"]
[Opening "Queen's pawn"]
[Variation "English defence"]

d4 b6 *

[ECO "A40"]
[Opening "Polish defence"]

d4 b5 *

[ECO "A40"]
[Opening "Queen's pawn"]

d4 e6 *

[ECO "A40"]
[Opening "Queen's pawn"]
[Variation "Keres defence"]

d4 e6 c4 b6 *

[ECO "A40"]
[Opening "Queen's pawn"]
[Variation "Franco-Indian (Keres) defence"]

d4 e6 c4 Bb4+ *

[ECO "A40"]
[Opening "Modern defence"]

d4 g6 *

[ECO "A40"]
[Opening "Beefeater defence"]

d4 g6 c4 Bg7 Nc3 c5 d5 Bxc3+ bxc3 f5 *

[ECO "A41"]
[Opening "Queen's Pawn"]

d4 d6 *

[ECO "A41"]
[Opening "Old Indian"]
[Variation "Tartakower (Wade) variation"]

d4 d6 Nf3 Bg4 *

[ECO "A41"]
[Opening "Old Indian defence"]

d4 d6 c4 *

[ECO "A41"]
[Opening "Modern defence"]

d4 d6 c4 g6 Nc3 Bg7 *

[ECO "A41"]
[Opening "Robatsch defence"]
[Variation "Rossolimo variation"]

e4 g6 d4 Bg7 Nf3 d6 c4 Bg4 *

[ECO "A42"]
[Opening "Modern defence"]
[Variation "Averbakh system"]

d4 d6 c4 g6 Nc3 Bg7 e4 *

[ECO "A42"]
[Opening "Pterodactyl defence"]

d4 d6 c4 g6 Nc3 Bg7 e4 c5 Nf3 Qa5 *

[ECO "A42"]
[Opening "Modern defence"]
[Variation "Averbakh system, Randspringer variation"]

d4 d6 c4 g6 Nc3 Bg7 e4 f5 *

[ECO "A42"]
[Opening "Modern defence"]
[Variation "Averbakh system, Kotov variation"]

d4 d6 c4 g6 Nc3 Bg7 e4 Nc6 *

[ECO "A43"]
[Opening "Old Benoni defence"]

d4 c5 *

[ECO "A43"]
[Opening "Old Benoni"]
[Variation "Franco-Benoni defence"]

d4 c5 d5 e6 e4 *

[ECO "A43"]
[Opening "Old Benoni"]
[Variation "Mujannah formation"]

d4 c5 d5 f5 *

[ECO "A43"]
[Opening "Old Benoni defence"]

d4 c5 d5 Nf6 *

[ECO "A43"]
[Opening "Woozle defence"]

d4 c5 d5 Nf6 Nc3 Qa5 *

[ECO "A43"]
[Opening "Old Benoni defence"]

d4 c5 d5 Nf6 Nf3 *

[ECO "A43"]
[Opening "Hawk (Habichd) defence"]

d4 c5 d5 Nf6 Nf3 c4 *

[ECO "A43"]
[Opening "Old Benoni defence"]

d4 c5 d5 d6 *

[ECO "A43"]
[Opening "Old Benoni"]
[Variation "Schmid's system"]

d4 c5 d5 d6 Nc3 g6 *

[ECO "A44"]
[Opening "Old Benoni defence"]

d4 c5 d5 e5 *

[ECO "A44"]
[Opening "Semi-Benoni (`blockade variation')"]

d4 c5 d5 e5 e4 d6 *

[ECO "A45"]
[Opening "Queen's pawn game"]

d4 Nf6 *

[ECO "A45"]
[Opening "Queen's pawn"]
[Variation "Bronstein gambit"]

d4 Nf6 g4 *

[ECO "A45"]
[Opening "Canard opening"]

d4 Nf6 f4 *

[ECO "A45"]
[Opening "Paleface attack"]

d4 Nf6 f3 *

[ECO "A45"]
[Opening "Blackmar-Diemer gambit"]

d4 Nf6 f3 d5 e4 *

[ECO "A45"]
[Opening "Gedult attack"]

d4 Nf6 f3 d5 g4 *

[ECO "A45"]
[Opening "Trompovsky attack (Ruth, Opočenský opening)"]

d4 Nf6 Bg5 *

[ECO "A46"]
[Opening "Queen's pawn game"]

d4 Nf6 Nf3 *

[ECO "A46"]
[Opening "Queen's pawn"]
[Variation "Torre attack"]

d4 Nf6 Nf3 e6 Bg5 *

[ECO "A46"]
[Opening "Queen's pawn"]
[Variation "Torre attack, Wagner gambit"]

d4 Nf6 Nf3 e6 Bg5 c5 e4 *

[ECO "A46"]
[Opening "Queen's pawn"]
[Variation "Yusupov-Rubinstein system"]

d4 Nf6 Nf3 e6 e3 *

[ECO "A46"]
[Opening "Döry defence"]

d4 Nf6 Nf3 Ne4 *

[ECO "A47"]
[Opening "Queen's Indian defence"]

d4 Nf6 Nf3 b6 *

[ECO "A47"]
[Opening "Queen's Indian"]
[Variation "Marienbad system"]

d4 Nf6 Nf3 b6 g3 Bb7 Bg2 c5 *

[ECO "A47"]
[Opening "Queen's Indian"]
[Variation "Marienbad system, Berg variation"]

d4 Nf6 Nf3 b6 g3 Bb7 Bg2 c5 c4 cxd4 Qxd4 *

[ECO "A48"]
[Opening "King's Indian"]
[Variation "East Indian defence"]

d4 Nf6 Nf3 g6 *

[ECO "A48"]
[Opening "King's Indian"]
[Variation "Torre attack"]

d4 Nf6 Nf3 g6 Bg5 *

[ECO "A48"]
[Opening "King's Indian"]
[Variation "London system"]

d4 Nf6 Nf3 g6 Bf4 *

[ECO "A49"]
[Opening "King's Indian"]
[Variation "fianchetto without c4"]

d4 Nf6 Nf3 g6 g3 *

[ECO "A50"]
[Opening "Queen's pawn game"]

d4 Nf6 c4 *

[ECO "A50"]
[Opening "Kevitz-Trajkovich defence"]

d4 Nf6 c4 Nc6 *

[ECO "A50"]
[Opening "Queen's Indian accelerated"]

d4 Nf6 c4 b6 *

[ECO "A51"]
[Opening "Budapest defence declined"]

d4 Nf6 c4 e5 *

[ECO "A51"]
[Opening "Budapest"]
[Variation "Fajarowicz variation"]

d4 Nf6 c4 e5 dxe5 Ne4 *

[ECO "A51"]
[Opening "Budapest"]
[Variation "Fajarowicz, Steiner variation"]

d4 Nf6 c4 e5 dxe5 Ne4 Qc2 *

[ECO "A52"]
[Opening "Budapest defence"]

d4 Nf6 c4 e5 dxe5 Ng4 *

[ECO "A52"]
[Opening "Budapest"]
[Variation "Adler variation"]

d4 Nf6 c4 e5 dxe5 Ng4 Nf3 *

[ECO "A52"]
[Opening "Budapest"]
[Variation "Rubinstein variation"]

d4 Nf6 c4 e5 dxe5 Ng4 Bf4 *

[ECO "A52"]
[Opening "Budapest"]
[Variation "Alekhine variation"]

d4 Nf6 c4 e5 dxe5 Ng4 e4 *

[ECO "A52"]
[Opening "Budapest"]
[Variation "Alekhine, Abonyi variation"]

d4 Nf6 c4 e5 dxe5 Ng4 e4 Nxe5 f4 Nec6 *

[ECO "A52"]
[Opening "Budapest"]
[Variation "Alekhine variation, Balogh gambit"]

d4 Nf6 c4 e5 dxe5 Ng4 e4 d6 *

[ECO "A53"]
[Opening "Old Indian defence"]

d4 Nf6 c4 d6 *

[ECO "A53"]
[Opening "Old Indian"]
[Variation "Janowski variation"]

d4 Nf6 c4 d6 Nc3 Bf5 *

[ECO "A54"]
[Opening "Old Indian"]
[Variation "Ukrainian variation"]

d4 Nf6 c4 d6 Nc3 e5 *

[ECO "A54"]
[Opening "Old Indian"]
[Variation "Dus-Khotimirsky variation"]

d4 Nf6 c4 d6 Nc3 e5 e3 Nbd7 Bd3 *

[ECO "A54"]
[Opening "Old Indian"]
[Variation "Ukrainian variation, 4.Nf3"]

d4 Nf6 c4 d6 Nc3 e5 Nf3 *

[ECO "A55"]
[Opening "Old Indian"]
[Variation "main line"]

d4 Nf6 c4 d6 Nc3 e5 Nf3 Nbd7 e4 *

[ECO "A56"]
[Opening "Benoni defence"]

d4 Nf6 c4 c5 *

[ECO "A56"]
[Opening "Benoni defence, Hromodka system"]

d4 Nf6 c4 c5 d5 d6 *

[ECO "A56"]
[Opening "Vulture defence"]

d4 Nf6 c4 c5 d5 Ne4 *

[ECO "A56"]
[Opening "Czech Benoni defence"]

d4 Nf6 c4 c5 d5 e5 *

[ECO "A56"]
[Opening "Czech Benoni"]
[Variation "King's Indian system"]

d4 Nf6 c4 c5 d5 e5 Nc3 d6 e4 g6 *

[ECO "A57"]
[Opening "Benko gambit"]

d4 Nf6 c4 c5 d5 b5 *

[ECO "A57"]
[Opening "Benko gambit half accepted"]

d4 Nf6 c4 c5 d5 b5 cxb5 a6 *

[ECO "A57"]
[Opening "Benko gambit"]
[Variation "Zaitsev system"]

d4 Nf6 c4 c5 d5 b5 cxb5 a6 Nc3 *

[ECO "A57"]
[Opening "Benko gambit"]
[Variation "Nescafe Frappe attack"]

d4 Nf6 c4 c5 d5 b5 cxb5 a6 Nc3 axb5 e4 b4 Nb5 d6 Bc4 *

[ECO "A58"]
[Opening "Benko gambit accepted"]

d4 Nf6 c4 c5 d5 b5 cxb5 a6 bxa6 *

[ECO "A58"]
[Opening "Benko gambit"]
[Variation "Nd2 variation"]

d4 Nf6 c4 c5 d5 b5 cxb5 a6 bxa6 Bxa6 Nc3 d6 Nf3 g6 Nd2 *

[ECO "A58"]
[Opening "Benko gambit"]
[Variation "fianchetto variation"]

d4 Nf6 c4 c5 d5 b5 cxb5 a6 bxa6 Bxa6 Nc3 d6 Nf3 g6 g3 *

[ECO "A59"]
[Opening "Benko gambit"]
[Variation "7.e4"]

d4 Nf6 c4 c5 d5 b5 cxb5 a6 bxa6 Bxa6 Nc3 d6 e4 *

[ECO "A59"]
[Opening "Benko gambit"]
[Variation "Ne2 variation"]

d4 Nf6 c4 c5 d5 b5 cxb5 a6 bxa6 Bxa6 Nc3 d6 e4 Bxf1 Kxf1 g6 Nge2 *

[ECO "A59"]
[Opening "Benko gambit"]

d4 Nf6 c4 c5 d5 b5 cxb5 a6 bxa6 Bxa6 Nc3 d6 e4 Bxf1 Kxf1 g6 g3 *

[ECO "A59"]
[Opening "Benko gambit"]
[Variation "main line"]

d4 Nf6 c4 c5 d5 b5 cxb5 a6 bxa6 Bxa6 Nc3 d6 e4 Bxf1 Kxf1 g6 g3 Bg7 Kg2 O-O Nf3 *

[ECO "A60"]
[Opening "Benoni defence"]

d4 Nf6 c4 c5 d5 e6 *

[ECO "A61"]
[Opening "Benoni defence"]

d4 Nf6 c4 c5 d5 e6 Nc3 exd5 cxd5 d6 Nf3 g6 *

[ECO "A61"]
[Opening "Benoni"]
[Variation "Uhlmann variation"]

d4 Nf6 c4 c5 d5 e6 Nc3 exd5 cxd5 d6 Nf3 g6 Bg5 *

[ECO "A61"]
[Opening "Benoni"]
[Variation "Nimzovich (knight's tour) variation"]

d4 Nf6 c4 c5 d5 e6 Nc3 exd5 cxd5 d6 Nf3 g6 Nd2 *

[ECO "A61"]
[Opening "Benoni"]
[Variation "fianchetto variation"]

d4 Nf6 c4 c5 d5 e6 Nc3 exd5 cxd5 d6 Nf3 g6 g3 *

[ECO "A62"]
[Opening "Benoni"]
[Variation "fianchetto variation"]

d4 Nf6 c4 c5 d5 e6 Nc3 exd5 cxd5 d6 Nf3 g6 g3 Bg7 Bg2 O-O *

[ECO "A63"]
[Opening "Benoni"]
[Variation "fianchetto, 9...Nbd7"]

d4 Nf6 c4 c5 d5 e6 Nc3 exd5 cxd5 d6 Nf3 g6 g3 Bg7 Bg2 O-O O-O Nbd7 *

[ECO "A64"]
[Opening "Benoni"]
[Variation "fianchetto, 11...Re8"]

d4 Nf6 c4 c5 d5 e6 Nc3 exd5 cxd5 d6 Nf3 g6 g3 Bg7 Bg2 O-O O-O Nbd7 Nd2 a6 a4 Re8 *

[ECO "A65"]
[Opening "Benoni"]
[Variation "6.e4"]

d4 Nf6 c4 c5 d5 e6 Nc3 exd5 cxd5 d6 e4 *

[ECO "A66"]
[Opening "Benoni"]
[Variation "pawn storm variation"]

d4 Nf6 c4 c5 d5 e6 Nc3 exd5 cxd5 d6 e4 g6 f4 *

[ECO "A66"]
[Opening "Benoni"]
[Variation "Mikenas variation"]

d4 Nf6 c4 c5 d5 e6 Nc3 exd5 cxd5 d6 e4 g6 f4 Bg7 e5 *

[ECO "A67"]
[Opening "Benoni"]
[Variation "Taimanov variation"]

d4 Nf6 c4 c5 d5 e6 Nc3 exd5 cxd5 d6 e4 g6 f4 Bg7 Bb5+ *

[ECO "A68"]
[Opening "Benoni"]
[Variation "four pawns attack"]

d4 Nf6 c4 c5 d5 e6 Nc3 exd5 cxd5 d6 e4 g6 f4 Bg7 Nf3 O-O *

[ECO "A69"]
[Opening "Benoni"]
[Variation "four pawns attack, main line"]

d4 Nf6 c4 c5 d5 e6 Nc3 exd5 cxd5 d6 e4 g6 f4 Bg7 Nf3 O-O Be2 Re8 *

[ECO "A70"]
[Opening "Benoni"]
[Variation "classical with e4 and Nf3"]

d4 Nf6 c4 c5 d5 e6 Nc3 exd5 cxd5 d6 e4 g6 Nf3 *

[ECO "A70"]
[Opening "Benoni"]
[Variation "classical without 9.O-O"]

d4 Nf6 c4 c5 d5 e6 Nc3 exd5 cxd5 d6 e4 g6 Nf3 Bg7 Be2 *

[ECO "A71"]
[Opening "Benoni"]
[Variation "classical, 8.Bg5"]

d4 Nf6 c4 c5 d5 e6 Nc3 exd5 cxd5 d6 e4 g6 Nf3 Bg7 Bg5 *

[ECO "A72"]
[Opening "Benoni"]
[Variation "classical without 9.O-O"]

d4 Nf6 c4 c5 d5 e6 Nc3 exd5 cxd5 d6 e4 g6 Nf3 Bg7 Be2 O-O *

[ECO "A73"]
[Opening "Benoni"]
[Variation "classical, 9.O-O"]

d4 Nf6 c4 c5 d5 e6 Nc3 exd5 cxd5 d6 e4 g6 Nf3 Bg7 Be2 O-O O-O *

[ECO "A74"]
[Opening "Benoni"]
[Variation "classical, 9...a6, 10.a4"]

d4 Nf6 c4 c5 d5 e6 Nc3 exd5 cxd5 d6 e4 g6 Nf3 Bg7 Be2 O-O O-O a6 a4 *

[ECO "A75"]
[Opening "Benoni"]
[Variation "classical with ...a6 and 10...Bg4"]

d4 Nf6 c4 c5 d5 e6 Nc3 exd5 cxd5 d6 e4 g6 Nf3 Bg7 Be2 O-O O-O a6 a4 Bg4 *

[ECO "A76"]
[Opening "Benoni"]
[Variation "classical, 9...Re8"]

d4 Nf6 c4 c5 d5 e6 Nc3 exd5 cxd5 d6 e4 g6 Nf3 Bg7 Be2 O-O O-O Re8 *

[ECO "A77"]
[Opening "Benoni"]
[Variation "classical, 9...Re8, 10.Nd2"]

d4 Nf6 c4 c5 d5 e6 Nc3 exd5 cxd5 d6 e4 g6 Nf3 Bg7 Be2 O-O O-O Re8 Nd2 *

[ECO "A78"]
[Opening "Benoni"]
[Variation "classical with ...Re8 and ...Na6"]

d4 Nf6 c4 c5 d5 e6 Nc3 exd5 cxd5 d6 e4 g6 Nf3 Bg7 Be2 O-O O-O Re8 Nd2 Na6 *

[ECO "A79"]
[Opening "Benoni"]
[Variation "classical, 11.f3"]

d4 Nf6 c4 c5 d5 e6 Nc3 exd5 cxd5 d6 e4 g6 Nf3 Bg7 Be2 O-O O-O Re8 Nd2 Na6 f3 *

[ECO "A80"]
[Opening "Dutch"]

d4 f5 *

[ECO "A80"]
[Opening "Dutch, Spielmann gambit"]

d4 f5 Nc3 Nf6 g4 *

[ECO "A80"]
[Opening "Dutch, Manhattan (Alapin, Ulvestad) variation"]

d4 f5 Qd3 *

[ECO "A80"]
[Opening "Dutch, Von Pretzel gambit"]

d4 f5 Qd3 e6 g4 *

[ECO "A80"]
[Opening "Dutch, Korchnoi attack"]

d4 f5 h3 *

[ECO "A80"]
[Opening "Dutch, Krejcik gambit"]

d4 f5 g4 *

[ECO "A80"]
[Opening "Dutch, 2.Bg5 variation"]

d4 f5 Bg5 *

[ECO "A81"]
[Opening "Dutch defence"]

d4 f5 g3 *

[ECO "A81"]
[Opening "Dutch defence, Blackburne variation"]

d4 f5 g3 Nf6 Bg2 e6 Nh3 *

[ECO "A81"]
[Opening "Dutch defence"]

d4 f5 g3 Nf6 Bg2 g6 *

[ECO "A81"]
[Opening "Dutch"]
[Variation "Leningrad, Basman system"]

d4 f5 g3 g6 Bg2 Bg7 Nf3 c6 O-O Nh6 *

[ECO "A81"]
[Opening "Dutch"]
[Variation "Leningrad, Karlsbad variation"]

d4 f5 g3 g6 Bg2 Bg7 Nh3 *

[ECO "A82"]
[Opening "Dutch"]
[Variation "Staunton gambit"]

d4 f5 e4 *

[ECO "A82"]
[Opening "Dutch"]
[Variation "Balogh defence"]

d4 f5 e4 d6 *

[ECO "A82"]
[Opening "Dutch"]
[Variation "Staunton gambit"]

d4 f5 e4 fxe4 *

[ECO "A82"]
[Opening "Dutch"]
[Variation "Staunton gambit, Tartakower variation"]

d4 f5 e4 fxe4 Nc3 Nf6 g4 *

[ECO "A83"]
[Opening "Dutch"]
[Variation "Staunton gambit, Staunton's line"]

d4 f5 e4 fxe4 Nc3 Nf6 Bg5 *

[ECO "A83"]
[Opening "Dutch"]
[Variation "Staunton gambit, Alekhine variation"]

d4 f5 e4 fxe4 Nc3 Nf6 Bg5 g6 h4 *

[ECO "A83"]
[Opening "Dutch"]
[Variation "Staunton gambit, Lasker variation"]

d4 f5 e4 fxe4 Nc3 Nf6 Bg5 g6 f3 *

[ECO "A83"]
[Opening "Dutch"]
[Variation "Staunton gambit, Chigorin variation"]

d4 f5 e4 fxe4 Nc3 Nf6 Bg5 c6 *

[ECO "A83"]
[Opening "Dutch"]
[Variation "Staunton gambit, Nimzovich variation"]

d4 f5 e4 fxe4 Nc3 Nf6 Bg5 b6 *

[ECO "A84"]
[Opening "Dutch defence"]

d4 f5 c4 *

[ECO "A84"]
[Opening "Dutch defence"]
[Variation "Bladel variation"]

d4 f5 c4 g6 Nc3 Nh6 *

[ECO "A84"]
[Opening "Dutch defence"]

d4 f5 c4 e6 *

[ECO "A84"]
[Opening "Dutch defence, Rubinstein variation"]

d4 f5 c4 e6 Nc3 *

[ECO "A84"]
[Opening "Dutch"]
[Variation "Staunton gambit deferred"]

d4 f5 c4 e6 e4 *

[ECO "A84"]
[Opening "Dutch defence"]

d4 f5 c4 Nf6 *

[ECO "A85"]
[Opening "Dutch with c4 & Nc3"]

d4 f5 c4 Nf6 Nc3 *

[ECO "A86"]
[Opening "Dutch with c4 & g3"]

d4 f5 c4 Nf6 g3 *

[ECO "A86"]
[Opening "Dutch"]
[Variation "Hort-Antoshin system"]

d4 f5 c4 Nf6 g3 d6 Bg2 c6 Nc3 Qc7 *

[ECO "A86"]
[Opening "Dutch"]
[Variation "Leningrad variation"]

d4 f5 c4 Nf6 g3 g6 *

[ECO "A87"]
[Opening "Dutch"]
[Variation "Leningrad, main variation"]

d4 f5 c4 Nf6 g3 g6 Bg2 Bg7 Nf3 *

[ECO "A88"]
[Opening "Dutch"]
[Variation "Leningrad, main variation with c6"]

d4 f5 c4 Nf6 g3 g6 Bg2 Bg7 Nf3 O-O O-O d6 Nc3 c6 *

[ECO "A89"]
[Opening "Dutch"]
[Variation "Leningrad, main variation with Nc6"]

d4 f5 c4 Nf6 g3 g6 Bg2 Bg7 Nf3 O-O O-O d6 Nc3 Nc6 *

[ECO "A90"]
[Opening "Dutch defence"]

d4 f5 c4 Nf6 g3 e6 Bg2 *

[ECO "A90"]
[Opening "Dutch defence"]
[Variation "Dutch-Indian (Nimzo-Dutch) variation"]

d4 f5 c4 Nf6 g3 e6 Bg2 Bb4+ *

[ECO "A90"]
[Opening "Dutch-Indian, Alekhine variation"]

d4 f5 c4 Nf6 g3 e6 Bg2 Bb4+ Bd2 Be7 *

[ECO "A91"]
[Opening "Dutch defence"]

d4 f5 c4 Nf6 g3 e6 Bg2 Be7 *

[ECO "A92"]
[Opening "Dutch defence"]

d4 f5 c4 Nf6 g3 e6 Bg2 Be7 Nf3 O-O *

[ECO "A92"]
[Opening "Dutch defence, Alekhine variation"]

d4 f5 c4 Nf6 g3 e6 Bg2 Be7 Nf3 O-O O-O Ne4 *

[ECO "A92"]
[Opening "Dutch"]
[Variation "stonewall variation"]

d4 f5 c4 Nf6 g3 e6 Bg2 Be7 Nf3 O-O O-O d5 *

[ECO "A92"]
[Opening "Dutch"]
[Variation "stonewall with Nc3"]

d4 f5 c4 Nf6 g3 e6 Bg2 Be7 Nf3 O-O O-O d5 Nc3 *

[ECO "A93"]
[Opening "Dutch"]
[Variation "stonewall, Botwinnik variation"]

d4 f5 c4 Nf6 g3 e6 Bg2 Be7 Nf3 O-O O-O d5 b3 *

[ECO "A94"]
[Opening "Dutch"]
[Variation "stonewall with Ba3"]

d4 f5 c4 Nf6 g3 e6 Bg2 Be7 Nf3 O-O O-O d5 b3 c6 Ba3 *

[ECO "A95"]
[Opening "Dutch"]
[Variation "stonewall with Nc3"]

d4 f5 c4 Nf6 g3 e6 Bg2 Be7 Nf3 O-O O-O d5 Nc3 c6 *

[ECO "A95"]
[Opening "Dutch"]
[Variation "stonewall: Chekhover variation"]

d4 f5 c4 Nf6 g3 e6 Bg2 Be7 Nf3 O-O O-O d5 Nc3 c6 Qc2 Qe8 Bg5 *

[ECO "A96"]
[Opening "Dutch"]
[Variation "classical variation"]

d4 f5 c4 Nf6 g3 e6 Bg2 Be7 Nf3 O-O O-O d6 *

[ECO "A97"]
[Opening "Dutch"]
[Variation "Ilyin-Genevsky variation"]

d4 f5 c4 Nf6 g3 e6 Bg2 Be7 Nf3 O-O O-O d6 Nc3 Qe8 *

[ECO "A97"]
[Opening "Dutch"]
[Variation "Ilyin-Genevsky, Winter variation"]

d4 f5 c4 Nf6 g3 e6 Bg2 Be7 Nf3 O-O O-O d6 Nc3 Qe8 Re1 *

[ECO "A98"]
[Opening "Dutch"]
[Variation "Ilyin-Genevsky variation with Qc2"]

d4 f5 c4 Nf6 g3 e6 Bg2 Be7 Nf3 O-O O-O d6 Nc3 Qe8 Qc2 *

[ECO "A99"]
[Opening "Dutch"]
[Variation "Ilyin-Genevsky variation with b3"]

d4 f5 c4 Nf6 g3 e6 Bg2 Be7 Nf3 O-O O-O d6 Nc3 Qe8 b3 *

[ECO "B00"]
[Opening "King's pawn opening"]

e4 *

[ECO "B00"]
[Opening "Hippopotamus defence"]

e4 Nh6 d4 g6 c4 f6 *

[ECO "B00"]
[Opening "Corn stalk defence"]

e4 a5 *

[ECO "B00"]
[Opening "Lemming defence"]

e4 Na6 *

[ECO "B00"]
[Opening "Fred"]

e4 f5 *

[ECO "B00"]
[Opening "Barnes defence"]

e4 f6 *

[ECO "B00"]
[Opening "Fried fox defence"]

e4 f6 d4 Kf7 *

[ECO "B00"]
[Opening "Carr's defence"]

e4 h6 *

[ECO "B00"]
[Opening "Reversed Grob (Borg/Basman defence/macho Grob)"]

e4 g5 *

[ECO "B00"]
[Opening "St. George (Baker) defence"]

e4 a6 *

[ECO "B00"]
[Opening "Owen defence"]

e4 b6 *

[ECO "B00"]
[Opening "Guatemala defence"]

e4 b6 d4 Ba6 *

[ECO "B00"]
[Opening "KP"]
[Variation "Nimzovich defence"]

e4 Nc6 *

[ECO "B00"]
[Opening "KP"]
[Variation "Nimzovich defence, Wheeler gambit"]

e4 Nc6 b4 Nxb4 c3 Nc6 d4 *

[ECO "B00"]
[Opening "KP"]
[Variation "Nimzovich defence"]

e4 Nc6 Nf3 *

[ECO "B00"]
[Opening "KP"]
[Variation "Colorado counter"]

e4 Nc6 Nf3 f5 *

[ECO "B00"]
[Opening "KP"]
[Variation "Nimzovich defence"]

e4 Nc6 d4 *

[ECO "B00"]
[Opening "KP"]
[Variation "Nimzovich defence, Marshall gambit"]

e4 Nc6 d4 d5 exd5 Qxd5 Nc3 *

[ECO "B00"]
[Opening "KP"]
[Variation "Nimzovich defence, Bogolyubov variation"]

e4 Nc6 d4 d5 Nc3 *

[ECO "B00"]
[Opening "KP"]
[Variation "Neo-Mongoloid defence"]

e4 Nc6 d4 f6 *

[ECO "B01"]
[Opening "Scandinavian (centre counter) defence"]

e4 d5 *

[ECO "B01"]
[Opening "Scandinavian defence, Lasker variation"]

e4 d5 exd5 Qxd5 Nc3 Qa5 d4 Nf6 Nf3 Bg4 h3 *

[ECO "B01"]
[Opening "Scandinavian defence"]

e4 d5 exd5 Qxd5 Nc3 Qa5 d4 Nf6 Nf3 Bf5 *

[ECO "B01"]
[Opening "Scandinavian defence, Grünfeld variation"]

e4 d5 exd5 Qxd5 Nc3 Qa5 d4 Nf6 Nf3 Bf5 Ne5 c6 g4 *

[ECO "B01"]
[Opening "Scandinavian"]
[Variation "Anderssen counter-attack"]

e4 d5 exd5 Qxd5 Nc3 Qa5 d4 e5 *

[ECO "B01"]
[Opening "Scandinavian"]
[Variation "Anderssen counter-attack orthodox attack"]

e4 d5 exd5 Qxd5 Nc3 Qa5 d4 e5 dxe5 Bb4 Bd2 Nc6 Nf3 *

[ECO "B01"]
[Opening "Scandinavian"]
[Variation "Anderssen counter-attack, Göteborg system"]

e4 d5 exd5 Qxd5 Nc3 Qa5 d4 e5 Nf3 *

[ECO "B01"]
[Opening "Scandinavian"]
[Variation "Anderssen counter-attack, Collijn variation"]

e4 d5 exd5 Qxd5 Nc3 Qa5 d4 e5 Nf3 Bg4 *

[ECO "B01"]
[Opening "Scandinavian, Mieses-Kotrvc gambit"]

e4 d5 exd5 Qxd5 Nc3 Qa5 b4 *

[ECO "B01"]
[Opening "Scandinavian"]
[Variation "Pytel-Wade variation"]

e4 d5 exd5 Qxd5 Nc3 Qd6 *

[ECO "B01"]
[Opening "Scandinavian defence"]

e4 d5 exd5 Nf6 *

[ECO "B01"]
[Opening "Scandinavian"]
[Variation "Icelandic gambit"]

e4 d5 exd5 Nf6 c4 e6 *

[ECO "B01"]
[Opening "Scandinavian gambit"]

e4 d5 exd5 Nf6 c4 c6 *

[ECO "B01"]
[Opening "Scandinavian defence"]

e4 d5 exd5 Nf6 d4 *

[ECO "B01"]
[Opening "Scandinavian"]
[Variation "Marshall variation"]

e4 d5 exd5 Nf6 d4 Nxd5 *

[ECO "B01"]
[Opening "Scandinavian"]
[Variation "Kiel variation"]

e4 d5 exd5 Nf6 d4 Nxd5 c4 Nb4 *

[ECO "B01"]
[Opening "Scandinavian"]
[Variation "Richter variation"]

e4 d5 exd5 Nf6 d4 g6 *

[ECO "B02"]
[Opening "Alekhine's defence"]

e4 Nf6 *

[ECO "B02"]
[Opening "Alekhine's defence"]
[Variation "Scandinavian variation"]

e4 Nf6 Nc3 d5 *

[ECO "B02"]
[Opening "Alekhine's defence"]
[Variation "Spielmann variation"]

e4 Nf6 Nc3 d5 e5 Nfd7 e6 *

[ECO "B02"]
[Opening "Alekhine's defence"]
[Variation "Maroczy variation"]

e4 Nf6 d3 *

[ECO "B02"]
[Opening "Alekhine's defence"]
[Variation "Krejcik variation"]

e4 Nf6 Bc4 *

[ECO "B02"]
[Opening "Alekhine's defence"]
[Variation "Mokele Mbembe (Buecker) variation"]

e4 Nf6 e5 Ne4 *

[ECO "B02"]
[Opening "Alekhine's defence"]
[Variation "Brooklyn defence"]

e4 Nf6 e5 Ng8 *

[ECO "B02"]
[Opening "Alekhine's defence"]

e4 Nf6 e5 Nd5 *

[ECO "B02"]
[Opening "Alekhine's defence"]
[Variation "Kmoch variation"]

e4 Nf6 e5 Nd5 Bc4 Nb6 Bb3 c5 d3 *

[ECO "B02"]
[Opening "Alekhine's defence"]
[Variation "Sämisch attack"]

e4 Nf6 e5 Nd5 Nc3 *

[ECO "B02"]
[Opening "Alekhine's defence"]
[Variation "Welling variation"]

e4 Nf6 e5 Nd5 b3 *

[ECO "B02"]
[Opening "Alekhine's defence"]

e4 Nf6 e5 Nd5 c4 *

[ECO "B02"]
[Opening "Alekhine's defence"]
[Variation "Steiner variation"]

e4 Nf6 e5 Nd5 c4 Nb6 b3 *

[ECO "B02"]
[Opening "Alekhine's defence"]
[Variation "two pawns' (Lasker's) attack"]

e4 Nf6 e5 Nd5 c4 Nb6 c5 *

[ECO "B02"]
[Opening "Alekhine's defence"]
[Variation "two pawns' attack, Mikenas variation"]

e4 Nf6 e5 Nd5 c4 Nb6 c5 Nd5 Bc4 e6 Nc3 d6 *

[ECO "B03"]
[Opening "Alekhine's defence"]

e4 Nf6 e5 Nd5 d4 *

[ECO "B03"]
[Opening "Alekhine's defence"]
[Variation "O'Sullivan gambit"]

e4 Nf6 e5 Nd5 d4 b5 *

[ECO "B03"]
[Opening "Alekhine's defence"]

e4 Nf6 e5 Nd5 d4 d6 *

[ECO "B03"]
[Opening "Alekhine's defence"]
[Variation "Balogh variation"]

e4 Nf6 e5 Nd5 d4 d6 Bc4 *

[ECO "B03"]
[Opening "Alekhine's defence"]

e4 Nf6 e5 Nd5 d4 d6 c4 *

[ECO "B03"]
[Opening "Alekhine's defence"]
[Variation "exchange variation"]

e4 Nf6 e5 Nd5 d4 d6 c4 Nb6 exd6 *

[ECO "B03"]
[Opening "Alekhine's defence"]
[Variation "exchange, Karpov variation"]

e4 Nf6 e5 Nd5 d4 d6 c4 Nb6 exd6 cxd6 Nf3 g6 Be2 Bg7 O-O O-O h3 Nc6 Nc3 Bf5 Bf4 *

[ECO "B03"]
[Opening "Alekhine's defence"]
[Variation "four pawns attack"]

e4 Nf6 e5 Nd5 d4 d6 c4 Nb6 f4 *

[ECO "B03"]
[Opening "Alekhine's defence"]
[Variation "four pawns attack, Korchnoi variation"]

e4 Nf6 e5 Nd5 d4 d6 c4 Nb6 f4 dxe5 fxe5 Bf5 Nc3 e6 Nf3 Be7 Be2 O-O O-O f6 *

[ECO "B03"]
[Opening "Alekhine's defence"]
[Variation "four pawns attack, 6...Nc6"]

e4 Nf6 e5 Nd5 d4 d6 c4 Nb6 f4 dxe5 fxe5 Nc6 *

[ECO "B03"]
[Opening "Alekhine's defence"]
[Variation "four pawns attack, Ilyin-Genevsky var."]

e4 Nf6 e5 Nd5 d4 d6 c4 Nb6 f4 dxe5 fxe5 Nc6 Nf3 Bg4 e6 fxe6 c5 *

[ECO "B03"]
[Opening "Alekhine's defence"]
[Variation "four pawns attack, 7.Be3"]

e4 Nf6 e5 Nd5 d4 d6 c4 Nb6 f4 dxe5 fxe5 Nc6 Be3 *

[ECO "B03"]
[Opening "Alekhine's defence"]
[Variation "four pawns attack, Tartakower variation"]

e4 Nf6 e5 Nd5 d4 d6 c4 Nb6 f4 dxe5 fxe5 Nc6 Be3 Bf5 Nc3 e6 Nf3 Qd7 Be2 O-O-O O-O Be7 *

[ECO "B03"]
[Opening "Alekhine's defence"]
[Variation "four pawns attack, Planinc variation"]

e4 Nf6 e5 Nd5 d4 d6 c4 Nb6 f4 g5 *

[ECO "B03"]
[Opening "Alekhine's defence"]
[Variation "four pawns attack, fianchetto variation"]

e4 Nf6 e5 Nd5 d4 d6 c4 Nb6 f4 g6 *

[ECO "B03"]
[Opening "Alekhine's defence"]
[Variation "four pawns attack, Trifunovic variation"]

e4 Nf6 e5 Nd5 d4 d6 c4 Nb6 f4 Bf5 *

[ECO "B04"]
[Opening "Alekhine's defence"]
[Variation "modern variation"]

e4 Nf6 e5 Nd5 d4 d6 Nf3 *

[ECO "B04"]
[Opening "Alekhine's defence"]
[Variation "modern, Larsen variation"]

e4 Nf6 e5 Nd5 d4 d6 Nf3 dxe5 *

[ECO "B04"]
[Opening "Alekhine's defence"]
[Variation "modern, Schmid variation"]

e4 Nf6 e5 Nd5 d4 d6 Nf3 Nb6 *

[ECO "B04"]
[Opening "Alekhine's defence"]
[Variation "modern, fianchetto variation"]

e4 Nf6 e5 Nd5 d4 d6 Nf3 g6 *

[ECO "B04"]
[Opening "Alekhine's defence"]
[Variation "modern, Keres variation"]

e4 Nf6 e5 Nd5 d4 d6 Nf3 g6 Bc4 Nb6 Bb3 Bg7 a4 *

[ECO "B05"]
[Opening "Alekhine's defence"]
[Variation "modern variation, 4...Bg4"]

e4 Nf6 e5 Nd5 d4 d6 Nf3 Bg4 *

[ECO "B05"]
[Opening "Alekhine's defence"]
[Variation "modern, Flohr variation"]

e4 Nf6 e5 Nd5 d4 d6 Nf3 Bg4 Be2 c6 *

[ECO "B05"]
[Opening "Alekhine's defence"]
[Variation "modern, Panov variation"]

e4 Nf6 e5 Nd5 d4 d6 Nf3 Bg4 h3 *

[ECO "B05"]
[Opening "Alekhine's defence"]
[Variation "modern, Alekhine variation"]

e4 Nf6 e5 Nd5 d4 d6 Nf3 Bg4 c4 *

[ECO "B05"]
[Opening "Alekhine's defence"]
[Variation "modern, Vitolins attack"]

e4 Nf6 e5 Nd5 d4 d6 Nf3 Bg4 c4 Nb6 d5 *

[ECO "B06"]
[Opening "Robatsch (modern) defence"]

e4 g6 *

[ECO "B06"]
[Opening "Norwegian defence"]

e4 g6 d4 Nf6 e5 Nh5 g4 Ng7 *

[ECO "B06"]
[Opening "Robatsch (modern) defence"]

e4 g6 d4 Bg7 *

[ECO "B06"]
[Opening "Robatsch defence"]
[Variation "three pawns attack"]

e4 g6 d4 Bg7 f4 *

[ECO "B06"]
[Opening "Robatsch defence"]

e4 g6 d4 Bg7 Nc3 *

[ECO "B06"]
[Opening "Robatsch defence"]
[Variation "Gurgenidze variation"]

e4 g6 d4 Bg7 Nc3 c6 f4 d5 e5 h5 *

[ECO "B06"]
[Opening "Robatsch (modern) defence"]

e4 g6 d4 Bg7 Nc3 d6 *

[ECO "B06"]
[Opening "Robatsch defence"]
[Variation "two knights variation"]

e4 g6 d4 Bg7 Nc3 d6 Nf3 *

[ECO "B06"]
[Opening "Robatsch defence"]
[Variation "two knights, Suttles variation"]

e4 g6 d4 Bg7 Nc3 d6 Nf3 c6 *

[ECO "B06"]
[Opening "Robatsch defence"]
[Variation "Pseudo-Austrian attack"]

e4 g6 d4 Bg7 Nc3 d6 f4 *

[ECO "B07"]
[Opening "Pirc defence"]

e4 d6 d4 Nf6 Nc3 *

[ECO "B07"]
[Opening "Pirc"]
[Variation "Ufimtsev-Pytel variation"]

e4 d6 d4 Nf6 Nc3 c6 *

[ECO "B07"]
[Opening "Pirc defence"]

e4 d6 d4 Nf6 Nc3 g6 *

[ECO "B07"]
[Opening "Pirc"]
[Variation "150 attack"]

e4 d6 d4 Nf6 Nc3 g6 Be3 c6 Qd2 *

[ECO "B07"]
[Opening "Pirc"]
[Variation "Sveshnikov system"]

e4 d6 d4 Nf6 Nc3 g6 g3 *

[ECO "B07"]
[Opening "Pirc"]
[Variation "Holmov system"]

e4 d6 d4 Nf6 Nc3 g6 Bc4 *

[ECO "B07"]
[Opening "Pirc"]
[Variation "Byrne variation"]

e4 d6 d4 Nf6 Nc3 g6 Bg5 *

[ECO "B07"]
[Opening "Pirc defence"]

e4 d6 d4 Nf6 Nc3 g6 Be2 *

[ECO "B07"]
[Opening "Pirc"]
[Variation "Chinese variation"]

e4 d6 d4 Nf6 Nc3 g6 Be2 Bg7 g4 *

[ECO "B07"]
[Opening "Pirc"]
[Variation "bayonet (Mariotti) attack"]

e4 d6 d4 Nf6 Nc3 g6 Be2 Bg7 h4 *

[ECO "B07"]
[Opening "Robatsch defence"]
[Variation "Geller's system"]

e4 g6 d4 Bg7 Nf3 d6 c3 *

[ECO "B08"]
[Opening "Pirc"]
[Variation "classical (two knights) system"]

e4 d6 d4 Nf6 Nc3 g6 Nf3 *

[ECO "B08"]
[Opening "Pirc"]
[Variation "classical (two knights) system"]

e4 d6 d4 Nf6 Nc3 g6 Nf3 Bg7 *

[ECO "B08"]
[Opening "Pirc"]
[Variation "classical, h3 system"]

e4 d6 d4 Nf6 Nc3 g6 Nf3 Bg7 h3 *

[ECO "B08"]
[Opening "Pirc"]
[Variation "classical system, 5.Be2"]

e4 d6 d4 Nf6 Nc3 g6 Nf3 Bg7 Be2 *

[ECO "B09"]
[Opening "Pirc"]
[Variation "Austrian attack"]

e4 d6 d4 Nf6 Nc3 g6 f4 *

[ECO "B09"]
[Opening "Pirc"]
[Variation "Austrian attack"]

e4 d6 d4 Nf6 Nc3 g6 f4 Bg7 Nf3 O-O *

[ECO "B09"]
[Opening "Pirc"]
[Variation "Austrian attack, 6.e5"]

e4 d6 d4 Nf6 Nc3 g6 f4 Bg7 Nf3 O-O e5 *

[ECO "B09"]
[Opening "Pirc"]
[Variation "Austrian attack, 6.Be3"]

e4 d6 d4 Nf6 Nc3 g6 f4 Bg7 Nf3 O-O Be3 *

[ECO "B09"]
[Opening "Pirc"]
[Variation "Austrian attack, 6.Bd3"]

e4 d6 d4 Nf6 Nc3 g6 f4 Bg7 Nf3 O-O Bd3 *

[ECO "B09"]
[Opening "Pirc"]
[Variation "Austrian attack, dragon formation"]

e4 d6 d4 Nf6 Nc3 g6 f4 Bg7 Nf3 c5 *

[ECO "B09"]
[Opening "Pirc"]
[Variation "Austrian attack, Ljubojevic variation"]

e4 d6 d4 Nf6 Nc3 g6 f4 Bg7 Bc4 *

[ECO "B10"]
[Opening "Caro-Kann defence"]

e4 c6 *

[ECO "B10"]
[Opening "Caro-Kann"]
[Variation "Hillbilly attack"]

e4 c6 Bc4 *

[ECO "B10"]
[Opening "Caro-Kann"]
[Variation "anti-Caro-Kann defence"]

e4 c6 c4 *

[ECO "B10"]
[Opening "Caro-Kann"]
[Variation "anti-anti-Caro-Kann defence"]

e4 c6 c4 d5 *

[ECO "B10"]
[Opening "Caro-Kann"]
[Variation "closed (Breyer) variation"]

e4 c6 d3 *

[ECO "B10"]
[Opening "Caro-Kann defence"]

e4 c6 Nc3 *

[ECO "B10"]
[Opening "Caro-Kann"]
[Variation "Goldman (Spielmann) variation"]

e4 c6 Nc3 d5 Qf3 *

[ECO "B10"]
[Opening "Caro-Kann"]
[Variation "two knights variation"]

e4 c6 Nc3 d5 Nf3 *

[ECO "B11"]
[Opening "Caro-Kann"]
[Variation "two knights, 3...Bg4"]

e4 c6 Nc3 d5 Nf3 Bg4 *

[ECO "B12"]
[Opening "Caro-Kann defence"]

e4 c6 d4 *

[ECO "B12"]
[Opening "de Bruycker defence"]

e4 c6 d4 Na6 Nc3 Nc7 *

[ECO "B12"]
[Opening "Caro-Masi defence"]

e4 c6 d4 Nf6 *

[ECO "B12"]
[Opening "Caro-Kann defence"]

e4 c6 d4 d5 *

[ECO "B12"]
[Opening "Caro-Kann"]
[Variation "Tartakower (fantasy) variation"]

e4 c6 d4 d5 f3 *

[ECO "B12"]
[Opening "Caro-Kann"]
[Variation "3.Nd2"]

e4 c6 d4 d5 Nd2 *

[ECO "B12"]
[Opening "Caro-Kann"]
[Variation "Edinburgh variation"]

e4 c6 d4 d5 Nd2 Qb6 *

[ECO "B12"]
[Opening "Caro-Kann"]
[Variation "advance variation"]

e4 c6 d4 d5 e5 *

[ECO "B12"]
[Opening "Caro-Kann"]
[Variation "advance, Short variation"]

e4 c6 d4 d5 e5 Bf5 c3 e6 Be2 *

[ECO "B13"]
[Opening "Caro-Kann"]
[Variation "exchange variation"]

e4 c6 d4 d5 exd5 *

[ECO "B13"]
[Opening "Caro-Kann"]
[Variation "exchange, Rubinstein variation"]

e4 c6 d4 d5 exd5 cxd5 Bd3 Nc6 c3 Nf6 Bf4 *

[ECO "B13"]
[Opening "Caro-Kann"]
[Variation "Panov-Botvinnik attack"]

e4 c6 d4 d5 exd5 cxd5 c4 *

[ECO "B13"]
[Opening "Caro-Kann"]
[Variation "Panov-Botvinnik, Gunderam attack"]

e4 c6 d4 d5 exd5 cxd5 c4 Nf6 c5 *

[ECO "B13"]
[Opening "Caro-Kann"]
[Variation "Panov-Botvinnik attack"]

e4 c6 d4 d5 exd5 cxd5 c4 Nf6 Nc3 *

[ECO "B13"]
[Opening "Caro-Kann"]
[Variation "Panov-Botvinnik, Herzog defence"]

e4 c6 d4 d5 exd5 cxd5 c4 Nf6 Nc3 Nc6 Bg5 dxc4 d5 Na5 *

[ECO "B13"]
[Opening "Caro-Kann"]
[Variation "Panov-Botvinnik, normal variation"]

e4 c6 d4 d5 exd5 cxd5 c4 Nf6 Nc3 Nc6 Bg5 e6 *

[ECO "B13"]
[Opening "Caro-Kann"]
[Variation "Panov-Botvinnik, Czerniak variation"]

e4 c6 d4 d5 exd5 cxd5 c4 Nf6 Nc3 Nc6 Bg5 Qa5 *

[ECO "B13"]
[Opening "Caro-Kann"]
[Variation "Panov-Botvinnik, Reifir (Spielmann) variation"]

e4 c6 d4 d5 exd5 cxd5 c4 Nf6 Nc3 Nc6 Bg5 Qb6 *

[ECO "B14"]
[Opening "Caro-Kann"]
[Variation "Panov-Botvinnik attack, 5...e6"]

e4 c6 d4 d5 exd5 cxd5 c4 Nf6 Nc3 e6 *

[ECO "B14"]
[Opening "Caro-Kann"]
[Variation "Panov-Botvinnik attack, 5...g6"]

e4 c6 d4 d5 exd5 cxd5 c4 Nf6 Nc3 g6 *

[ECO "B15"]
[Opening "Caro-Kann defence"]

e4 c6 d4 d5 Nc3 *

[ECO "B15"]
[Opening "Caro-Kann"]
[Variation "Gurgenidze counter-attack"]

e4 c6 d4 d5 Nc3 b5 *

[ECO "B15"]
[Opening "Caro-Kann"]
[Variation "Gurgenidze system"]

e4 c6 d4 d5 Nc3 g6 *

[ECO "B15"]
[Opening "Caro-Kann"]
[Variation "Rasa-Studier gambit"]

e4 c6 d4 d5 Nc3 dxe4 f3 *

[ECO "B15"]
[Opening "Caro-Kann defence"]

e4 c6 d4 d5 Nc3 dxe4 Nxe4 *

[ECO "B15"]
[Opening "Caro-Kann"]
[Variation "Alekhine gambit"]

e4 c6 d4 d5 Nc3 dxe4 Nxe4 Nf6 Bd3 *

[ECO "B15"]
[Opening "Caro-Kann"]
[Variation "Tartakower (Nimzovich) variation"]

e4 c6 d4 d5 Nc3 dxe4 Nxe4 Nf6 Nxf6+ exf6 *

[ECO "B15"]
[Opening "Caro-Kann"]
[Variation "Forgacs variation"]

e4 c6 d4 d5 Nc3 dxe4 Nxe4 Nf6 Nxf6+ exf6 Bc4 *

[ECO "B16"]
[Opening "Caro-Kann"]
[Variation "Bronstein-Larsen variation"]

e4 c6 d4 d5 Nc3 dxe4 Nxe4 Nf6 Nxf6+ gxf6 *

[ECO "B17"]
[Opening "Caro-Kann"]
[Variation "Steinitz variation"]

e4 c6 d4 d5 Nc3 dxe4 Nxe4 Nd7 *

[ECO "B18"]
[Opening "Caro-Kann"]
[Variation "classical variation"]

e4 c6 d4 d5 Nc3 dxe4 Nxe4 Bf5 *

[ECO "B18"]
[Opening "Caro-Kann"]
[Variation "classical, Flohr variation"]

e4 c6 d4 d5 Nc3 dxe4 Nxe4 Bf5 Ng3 Bg6 Nh3 *

[ECO "B18"]
[Opening "Caro-Kann"]
[Variation "classical, Maroczy attack"]

e4 c6 d4 d5 Nc3 dxe4 Nxe4 Bf5 Ng3 Bg6 f4 *

[ECO "B18"]
[Opening "Caro-Kann"]
[Variation "classical, 6.h4"]

e4 c6 d4 d5 Nc3 dxe4 Nxe4 Bf5 Ng3 Bg6 h4 *

[ECO "B19"]
[Opening "Caro-Kann"]
[Variation "classical, 7...Nd7"]

e4 c6 d4 d5 Nc3 dxe4 Nxe4 Bf5 Ng3 Bg6 h4 h6 Nf3 Nd7 *

[ECO "B19"]
[Opening "Caro-Kann"]
[Variation "classical, Spassky variation"]

e4 c6 d4 d5 Nc3 dxe4 Nxe4 Bf5 Ng3 Bg6 h4 h6 Nf3 Nd7 h5 *

[ECO "B20"]
[Opening "Sicilian defence"]

e4 c5 *

[ECO "B20"]
[Opening "Sicilian"]
[Variation "Gloria variation"]

e4 c5 c4 d6 Nc3 Nc6 g3 h5 *

[ECO "B20"]
[Opening "Sicilian"]
[Variation "Steinitz variation"]

e4 c5 g3 *

[ECO "B20"]
[Opening "Sicilian"]
[Variation "wing gambit"]

e4 c5 b4 *

[ECO "B20"]
[Opening "Sicilian"]
[Variation "wing gambit, Santasiere variation"]

e4 c5 b4 cxb4 c4 *

[ECO "B20"]
[Opening "Sicilian"]
[Variation "wing gambit, Marshall variation"]

e4 c5 b4 cxb4 a3 *

[ECO "B20"]
[Opening "Sicilian"]
[Variation "wing gambit, Marienbad variation"]

e4 c5 b4 cxb4 a3 d5 exd5 Qxd5 Bb2 *

[ECO "B20"]
[Opening "Sicilian"]
[Variation "wing gambit, Carlsbad variation"]

e4 c5 b4 cxb4 a3 bxa3 *

[ECO "B20"]
[Opening "Sicilian"]
[Variation "Keres variation (2.Ne2)"]

e4 c5 Ne2 *

[ECO "B21"]
[Opening "Sicilian"]
[Variation "Grand Prix attack"]

e4 c5 f4 *

[ECO "B21"]
[Opening "Sicilian"]
[Variation "Smith-Morra gambit"]

e4 c5 d4 *

[ECO "B21"]
[Opening "Sicilian"]
[Variation "Andreaschek gambit"]

e4 c5 d4 cxd4 Nf3 e5 c3 *

[ECO "B21"]
[Opening "Sicilian"]
[Variation "Smith-Morra gambit"]

e4 c5 d4 cxd4 c3 *

[ECO "B21"]
[Opening "Sicilian"]
[Variation "Smith-Morra gambit, Chicago defence"]

e4 c5 d4 cxd4 c3 dxc3 Nxc3 Nc6 Nf3 d6 Bc4 e6 O-O a6 Qe2 b5 Bb3 Ra7 *

[ECO "B22"]
[Opening "Sicilian"]
[Variation "Alapin's variation (2.c3)"]

e4 c5 c3 *

[ECO "B22"]
[Opening "Sicilian"]
[Variation "2.c3, Heidenfeld variation"]

e4 c5 c3 Nf6 e5 Nd5 Nf3 Nc6 Na3 *

[ECO "B23"]
[Opening "Sicilian"]
[Variation "closed"]

e4 c5 Nc3 *

[ECO "B23"]
[Opening "Sicilian"]
[Variation "closed, Korchnoi variation"]

e4 c5 Nc3 e6 g3 d5 *

[ECO "B23"]
[Opening "Sicilian"]
[Variation "closed, 2...Nc6"]

e4 c5 Nc3 Nc6 *

[ECO "B23"]
[Opening "Sicilian"]
[Variation "chameleon variation"]

e4 c5 Nc3 Nc6 Nge2 *

[ECO "B23"]
[Opening "Sicilian"]
[Variation "Grand Prix attack"]

e4 c5 Nc3 Nc6 f4 *

[ECO "B23"]
[Opening "Sicilian"]
[Variation "Grand Prix attack, Schofman variation"]

e4 c5 Nc3 Nc6 f4 g6 Nf3 Bg7 Bc4 e6 f5 *

[ECO "B24"]
[Opening "Sicilian"]
[Variation "closed"]

e4 c5 Nc3 Nc6 g3 *

[ECO "B24"]
[Opening "Sicilian"]
[Variation "closed, Smyslov variation"]

e4 c5 Nc3 Nc6 g3 g6 Bg2 Bg7 d3 e6 Be3 Nd4 Nce2 *

[ECO "B25"]
[Opening "Sicilian"]
[Variation "closed"]

e4 c5 Nc3 Nc6 g3 g6 Bg2 Bg7 d3 d6 *

[ECO "B25"]
[Opening "Sicilian"]
[Variation "closed, 6.Ne2 e5 (Botvinnik)"]

e4 c5 Nc3 Nc6 g3 g6 Bg2 Bg7 d3 d6 Nge2 e5 *

[ECO "B25"]
[Opening "Sicilian"]
[Variation "closed, 6.f4"]

e4 c5 Nc3 Nc6 g3 g6 Bg2 Bg7 d3 d6 f4 *

[ECO "B25"]
[Opening "Sicilian"]
[Variation "closed, 6.f4 e5 (Botvinnik)"]

e4 c5 Nc3 Nc6 g3 g6 Bg2 Bg7 d3 d6 f4 e5 *

[ECO "B26"]
[Opening "Sicilian"]
[Variation "closed, 6.Be3"]

e4 c5 Nc3 Nc6 g3 g6 Bg2 Bg7 d3 d6 Be3 *

[ECO "B27"]
[Opening "Sicilian defence"]

e4 c5 Nf3 *

[ECO "B27"]
[Opening "Sicilian"]
[Variation "Stiletto (Althouse) variation"]

e4 c5 Nf3 Qa5 *

[ECO "B27"]
[Opening "Sicilian"]
[Variation "Quinteros variation"]

e4 c5 Nf3 Qc7 *

[ECO "B27"]
[Opening "Sicilian"]
[Variation "Katalimov variation"]

e4 c5 Nf3 b6 *

[ECO "B27"]
[Opening "Sicilian"]
[Variation "Hungarian variation"]

e4 c5 Nf3 g6 *

[ECO "B27"]
[Opening "Sicilian"]
[Variation "Acton extension"]

e4 c5 Nf3 g6 c4 Bh6 *

[ECO "B28"]
[Opening "Sicilian"]
[Variation "O'Kelly variation"]

e4 c5 Nf3 a6 *

[ECO "B29"]
[Opening "Sicilian"]
[Variation "Nimzovich-Rubinstein variation"]

e4 c5 Nf3 Nf6 *

[ECO "B29"]
[Opening "Sicilian"]
[Variation "Nimzovich-Rubinstein; Rubinstein counter-gambit"]

e4 c5 Nf3 Nf6 e5 Nd5 Nc3 e6 Nxd5 exd5 d4 Nc6 *

[ECO "B30"]
[Opening "Sicilian defence"]

e4 c5 Nf3 Nc6 *

[ECO "B30"]
[Opening "Sicilian"]
[Variation "Nimzovich-Rossolimo attack (without ...d6)"]

e4 c5 Nf3 Nc6 Bb5 *

[ECO "B31"]
[Opening "Sicilian"]
[Variation "Nimzovich-Rossolimo attack (with ...g6, without ...d6)"]

e4 c5 Nf3 Nc6 Bb5 g6 *

[ECO "B31"]
[Opening "Sicilian"]
[Variation "Nimzovich-Rossolimo attack, Gurgenidze variation"]

e4 c5 Nf3 Nc6 Bb5 g6 O-O Bg7 Re1 e5 b4 *

[ECO "B32"]
[Opening "Sicilian defence"]

e4 c5 Nf3 Nc6 d4 *

[ECO "B32"]
[Opening "Sicilian"]
[Variation "Flohr variation"]

e4 c5 Nf3 Nc6 d4 cxd4 Nxd4 Qc7 *

[ECO "B32"]
[Opening "Sicilian"]
[Variation "Nimzovich variation"]

e4 c5 Nf3 Nc6 d4 cxd4 Nxd4 d5 *

[ECO "B32"]
[Opening "Sicilian"]
[Variation "Labourdonnais-Löwenthal variation"]

e4 c5 Nf3 Nc6 d4 cxd4 Nxd4 e5 *

[ECO "B32"]
[Opening "Sicilian"]
[Variation "Labourdonnais-Löwenthal (Kalashnikov) variation"]

e4 c5 Nf3 Nc6 d4 cxd4 Nxd4 e5 Nb5 d6 *

[ECO "B33"]
[Opening "Sicilian defence"]

e4 c5 Nf3 Nc6 d4 cxd4 Nxd4 Nf6 *

[ECO "B33"]
[Opening "Sicilian"]
[Variation "Pelikan (Lasker/Sveshnikov) variation"]

e4 c5 Nf3 Nc6 d4 cxd4 Nxd4 Nf6 Nc3 e5 *

[ECO "B33"]
[Opening "Sicilian"]
[Variation "Pelikan, Bird variation"]

e4 c5 Nf3 Nc6 d4 cxd4 Nxd4 Nf6 Nc3 e5 Ndb5 d6 Bg5 a6 Na3 Be6 *

[ECO "B33"]
[Opening "Sicilian"]
[Variation "Pelikan, Chelyabinsk variation"]

e4 c5 Nf3 Nc6 d4 cxd4 Nxd4 Nf6 Nc3 e5 Ndb5 d6 Bg5 a6 Na3 b5 *

[ECO "B33"]
[Opening "Sicilian"]
[Variation "Sveshnikov variation"]

e4 c5 Nf3 Nc6 d4 cxd4 Nxd4 Nf6 Nc3 e5 Ndb5 d6 Bg5 a6 Na3 b5 Bxf6 gxf6 Nd5 f5 *

[ECO "B34"]
[Opening "Sicilian"]
[Variation "accelerated fianchetto, exchange variation"]

e4 c5 Nf3 Nc6 d4 cxd4 Nxd4 g6 Nxc6 *

[ECO "B34"]
[Opening "Sicilian"]
[Variation "accelerated fianchetto, modern variation"]

e4 c5 Nf3 Nc6 d4 cxd4 Nxd4 g6 Nc3 *

[ECO "B35"]
[Opening "Sicilian"]
[Variation "accelerated fianchetto, modern variation with Bc4"]

e4 c5 Nf3 Nc6 d4 cxd4 Nxd4 g6 Nc3 Bg7 Be3 Nf6 Bc4 *

[ECO "B36"]
[Opening "Sicilian"]
[Variation "accelerated fianchetto, Maroczy bind"]

e4 c5 Nf3 Nc6 d4 cxd4 Nxd4 g6 c4 *

[ECO "B36"]
[Opening "Sicilian"]
[Variation "accelerated fianchetto, Gurgenidze variation"]

e4 c5 Nf3 Nc6 d4 cxd4 Nxd4 g6 c4 Nf6 Nc3 Nxd4 Qxd4 d6 *

[ECO "B37"]
[Opening "Sicilian"]
[Variation "accelerated fianchetto, Maroczy bind, 5...Bg7"]

e4 c5 Nf3 Nc6 d4 cxd4 Nxd4 g6 c4 Bg7 *

[ECO "B37"]
[Opening "Sicilian"]
[Variation "accelerated fianchetto, Simagin variation"]

e4 c5 Nf3 Nc6 d4 cxd4 Nxd4 g6 c4 Bg7 Nc2 d6 Be2 Nh6 *

[ECO "B38"]
[Opening "Sicilian"]
[Variation "accelerated fianchetto, Maroczy bind, 6.Be3"]

e4 c5 Nf3 Nc6 d4 cxd4 Nxd4 g6 c4 Bg7 Be3 *

[ECO "B39"]
[Opening "Sicilian"]
[Variation "accelerated fianchetto, Breyer variation"]

e4 c5 Nf3 Nc6 d4 cxd4 Nxd4 g6 c4 Bg7 Be3 Nf6 Nc3 Ng4 *

[ECO "B40"]
[Opening "Sicilian defence"]

e4 c5 Nf3 e6 *

[ECO "B40"]
[Opening "Sicilian"]
[Variation "Marshall variation"]

e4 c5 Nf3 e6 d4 d5 *

[ECO "B40"]
[Opening "Sicilian defence"]

e4 c5 Nf3 e6 d4 cxd4 *

[ECO "B40"]
[Opening "Sicilian"]
[Variation "Anderssen variation"]

e4 c5 Nf3 e6 d4 cxd4 Nxd4 Nf6 *

[ECO "B40"]
[Opening "Sicilian"]
[Variation "Pin variation (Sicilian counter-attack)"]

e4 c5 Nf3 e6 d4 cxd4 Nxd4 Nf6 Nc3 Bb4 *

[ECO "B40"]
[Opening "Sicilian"]
[Variation "Pin, Jaffe variation"]

e4 c5 Nf3 e6 d4 cxd4 Nxd4 Nf6 Nc3 Bb4 Bd3 e5 *

[ECO "B40"]
[Opening "Sicilian"]
[Variation "Pin, Koch variation"]

e4 c5 Nf3 e6 d4 cxd4 Nxd4 Nf6 Nc3 Bb4 e5 *

[ECO "B41"]
[Opening "Sicilian"]
[Variation "Kan variation"]

e4 c5 Nf3 e6 d4 cxd4 Nxd4 a6 *

[ECO "B41"]
[Opening "Sicilian"]
[Variation "Kan, Maroczy bind (Reti variation)"]

e4 c5 Nf3 e6 d4 cxd4 Nxd4 a6 c4 *

[ECO "B41"]
[Opening "Sicilian"]
[Variation "Kan, Maroczy bind - Bronstein variation"]

e4 c5 Nf3 e6 d4 cxd4 Nxd4 a6 c4 Nf6 Nc3 Bb4 Bd3 Nc6 Bc2 *

[ECO "B42"]
[Opening "Sicilian"]
[Variation "Kan, 5.Bd3"]

e4 c5 Nf3 e6 d4 cxd4 Nxd4 a6 Bd3 *

[ECO "B42"]
[Opening "Sicilian"]
[Variation "Kan, Gipslis variation"]

e4 c5 Nf3 e6 d4 cxd4 Nxd4 a6 Bd3 Nf6 O-O d6 c4 g6 *

[ECO "B42"]
[Opening "Sicilian"]
[Variation "Kan, Polugaievsky variation"]

e4 c5 Nf3 e6 d4 cxd4 Nxd4 a6 Bd3 Bc5 *

[ECO "B42"]
[Opening "Sicilian"]
[Variation "Kan, Swiss cheese variation"]

e4 c5 Nf3 e6 d4 cxd4 Nxd4 a6 Bd3 g6 *

[ECO "B43"]
[Opening "Sicilian"]
[Variation "Kan, 5.Nc3"]

e4 c5 Nf3 e6 d4 cxd4 Nxd4 a6 Nc3 *

[ECO "B44"]
[Opening "Sicilian defence"]

e4 c5 Nf3 e6 d4 cxd4 Nxd4 Nc6 *

[ECO "B44"]
[Opening "Sicilian, Szen (`anti-Taimanov') variation"]

e4 c5 Nf3 e6 d4 cxd4 Nxd4 Nc6 Nb5 *

[ECO "B44"]
[Opening "Sicilian, Szen, hedgehog variation"]

e4 c5 Nf3 e6 d4 cxd4 Nxd4 Nc6 Nb5 d6 c4 Nf6 N1c3 a6 Na3 Be7 Be2 O-O O-O b6 *

[ECO "B44"]
[Opening "Sicilian, Szen variation, Dely-Kasparov gambit"]

e4 c5 Nf3 e6 d4 cxd4 Nxd4 Nc6 Nb5 d6 c4 Nf6 N1c3 a6 Na3 d5 *

[ECO "B45"]
[Opening "Sicilian"]
[Variation "Taimanov variation"]

e4 c5 Nf3 e6 d4 cxd4 Nxd4 Nc6 Nc3 *

[ECO "B45"]
[Opening "Sicilian"]
[Variation "Taimanov, American attack"]

e4 c5 Nf3 e6 d4 cxd4 Nxd4 Nc6 Nc3 Nf6 Ndb5 Bb4 Nd6+ *

[ECO "B46"]
[Opening "Sicilian"]
[Variation "Taimanov variation"]

e4 c5 Nf3 e6 d4 cxd4 Nxd4 Nc6 Nc3 a6 *

[ECO "B47"]
[Opening "Sicilian"]
[Variation "Taimanov (Bastrikov) variation"]

e4 c5 Nf3 e6 d4 cxd4 Nxd4 Nc6 Nc3 Qc7 *

[ECO "B48"]
[Opening "Sicilian"]
[Variation "Taimanov variation"]

e4 c5 Nf3 e6 d4 cxd4 Nxd4 Nc6 Nc3 Qc7 Be3 *

[ECO "B49"]
[Opening "Sicilian"]
[Variation "Taimanov variation"]

e4 c5 Nf3 e6 d4 cxd4 Nxd4 Nc6 Nc3 Qc7 Be3 a6 Be2 *

[ECO "B50"]
[Opening "Sicilian"]

e4 c5 Nf3 d6 *

[ECO "B50"]
[Opening "Sicilian"]
[Variation "wing gambit deferred"]

e4 c5 Nf3 d6 b4 *

[ECO "B51"]
[Opening "Sicilian"]
[Variation "Canal-Sokolsky (Nimzovich-Rossolimo, Moscow) attack"]

e4 c5 Nf3 d6 Bb5+ *

[ECO "B52"]
[Opening "Sicilian"]
[Variation "Canal-Sokolsky attack, 3...Bd7"]

e4 c5 Nf3 d6 Bb5+ Bd7 *

[ECO "B52"]
[Opening "Sicilian"]
[Variation "Canal-Sokolsky attack, Bronstein gambit"]

e4 c5 Nf3 d6 Bb5+ Bd7 Bxd7+ Qxd7 O-O Nc6 c3 Nf6 d4 *

[ECO "B52"]
[Opening "Sicilian"]
[Variation "Canal-Sokolsky attack, Sokolsky variation"]

e4 c5 Nf3 d6 Bb5+ Bd7 Bxd7+ Qxd7 c4 *

[ECO "B53"]
[Opening "Sicilian, Chekhover variation"]

e4 c5 Nf3 d6 d4 cxd4 Qxd4 *

[ECO "B53"]
[Opening "Sicilian"]
[Variation "Chekhover, Zaitsev variation"]

e4 c5 Nf3 d6 d4 cxd4 Qxd4 Nc6 Bb5 Qd7 *

[ECO "B54"]
[Opening "Sicilian"]

e4 c5 Nf3 d6 d4 cxd4 Nxd4 *

[ECO "B54"]
[Opening "Sicilian"]
[Variation "Prins (Moscow) variation"]

e4 c5 Nf3 d6 d4 cxd4 Nxd4 Nf6 f3 *

[ECO "B55"]
[Opening "Sicilian"]
[Variation "Prins variation, Venice attack"]

e4 c5 Nf3 d6 d4 cxd4 Nxd4 Nf6 f3 e5 Bb5+ *

[ECO "B56"]
[Opening "Sicilian"]

e4 c5 Nf3 d6 d4 cxd4 Nxd4 Nf6 Nc3 *

[ECO "B56"]
[Opening "Sicilian"]
[Variation "Venice attack"]

e4 c5 Nf3 d6 d4 cxd4 Nxd4 Nf6 Nc3 e5 Bb5+ *

[ECO "B56"]
[Opening "Sicilian"]

e4 c5 Nf3 d6 d4 cxd4 Nxd4 Nf6 Nc3 Nc6 *

[ECO "B57"]
[Opening "Sicilian"]
[Variation "Sozin, not Scheveningen"]

e4 c5 Nf3 d6 d4 cxd4 Nxd4 Nf6 Nc3 Nc6 Bc4 *

[ECO "B57"]
[Opening "Sicilian"]
[Variation "Magnus Smith trap"]

e4 c5 Nf3 d6 d4 cxd4 Nxd4 Nf6 Nc3 Nc6 Bc4 g6 Nxc6 bxc6 e5 *

[ECO "B57"]
[Opening "Sicilian"]
[Variation "Sozin, Benko variation"]

e4 c5 Nf3 d6 d4 cxd4 Nxd4 Nf6 Nc3 Nc6 Bc4 Qb6 *

[ECO "B58"]
[Opening "Sicilian"]
[Variation "classical"]

e4 c5 Nf3 Nc6 d4 cxd4 Nxd4 Nf6 Nc3 d6 Be2 *

[ECO "B58"]
[Opening "Sicilian"]
[Variation "Boleslavsky variation"]

e4 c5 Nf3 Nc6 d4 cxd4 Nxd4 Nf6 Nc3 d6 Be2 e5 *

[ECO "B58"]
[Opening "Sicilian"]
[Variation "Boleslavsky, Louma variation"]

e4 c5 Nf3 Nc6 d4 cxd4 Nxd4 Nf6 Nc3 d6 Be2 e5 Nxc6 *

[ECO "B59"]
[Opening "Sicilian"]
[Variation "Boleslavsky variation, 7.Nb3"]

e4 c5 Nf3 Nc6 d4 cxd4 Nxd4 Nf6 Nc3 d6 Be2 e5 Nb3 *

[ECO "B60"]
[Opening "Sicilian"]
[Variation "Richter-Rauzer"]

e4 c5 Nf3 d6 d4 cxd4 Nxd4 Nf6 Nc3 Nc6 Bg5 *

[ECO "B60"]
[Opening "Sicilian"]
[Variation "Richter-Rauzer, Bondarevsky variation"]

e4 c5 Nf3 d6 d4 cxd4 Nxd4 Nf6 Nc3 Nc6 Bg5 g6 *

[ECO "B60"]
[Opening "Sicilian"]
[Variation "Richter-Rauzer, Larsen variation"]

e4 c5 Nf3 d6 d4 cxd4 Nxd4 Nf6 Nc3 Nc6 Bg5 Bd7 *

[ECO "B61"]
[Opening "Sicilian"]
[Variation "Richter-Rauzer, Larsen variation, 7.Qd2"]

e4 c5 Nf3 d6 d4 cxd4 Nxd4 Nf6 Nc3 Nc6 Bg5 Bd7 Qd2 *

[ECO "B62"]
[Opening "Sicilian"]
[Variation "Richter-Rauzer, 6...e6"]

e4 c5 Nf3 d6 d4 cxd4 Nxd4 Nf6 Nc3 Nc6 Bg5 e6 *

[ECO "B62"]
[Opening "Sicilian"]
[Variation "Richter-Rauzer, Podvebrady variation"]

e4 c5 Nf3 d6 d4 cxd4 Nxd4 Nf6 Nc3 Nc6 Bg5 e6 Nb3 *

[ECO "B62"]
[Opening "Sicilian"]
[Variation "Richter-Rauzer, Margate (Alekhine) variation"]

e4 c5 Nf3 d6 d4 cxd4 Nxd4 Nf6 Nc3 Nc6 Bg5 e6 Bb5 *

[ECO "B62"]
[Opening "Sicilian"]
[Variation "Richter-Rauzer, Richter attack"]

e4 c5 Nf3 d6 d4 cxd4 Nxd4 Nf6 Nc3 Nc6 Bg5 e6 Nxc6 *

[ECO "B62"]
[Opening "Sicilian"]
[Variation "Richter-Rauzer, Keres variation"]

e4 c5 Nf3 d6 d4 cxd4 Nxd4 Nf6 Nc3 Nc6 Bg5 e6 Qd3 *

[ECO "B63"]
[Opening "Sicilian"]
[Variation "Richter-Rauzer, Rauzer attack"]

e4 c5 Nf3 d6 d4 cxd4 Nxd4 Nf6 Nc3 Nc6 Bg5 e6 Qd2 *

[ECO "B63"]
[Opening "Sicilian"]
[Variation "Richter-Rauzer, Rauzer attack, 7...Be7"]

e4 c5 Nf3 d6 d4 cxd4 Nxd4 Nf6 Nc3 Nc6 Bg5 e6 Qd2 Be7 *

[ECO "B64"]
[Opening "Sicilian"]
[Variation "Richter-Rauzer, Rauzer attack, 7...Be7 defence, 9.f4"]

e4 c5 Nf3 d6 d4 cxd4 Nxd4 Nf6 Nc3 Nc6 Bg5 e6 Qd2 Be7 O-O-O O-O f4 *

[ECO "B64"]
[Opening "Sicilian"]
[Variation "Richter-Rauzer, Rauzer attack, Geller variation"]

e4 c5 Nf3 d6 d4 cxd4 Nxd4 Nf6 Nc3 Nc6 Bg5 e6 Qd2 Be7 O-O-O O-O f4 e5 *

[ECO "B65"]
[Opening "Sicilian"]
[Variation "Richter-Rauzer, Rauzer attack, 7...Be7 defence, 9...Nxd4"]

e4 c5 Nf3 d6 d4 cxd4 Nxd4 Nf6 Nc3 Nc6 Bg5 e6 Qd2 Be7 O-O-O O-O f4 Nxd4 *

[ECO "B65"]
[Opening "Sicilian"]
[Variation "Richter-Rauzer, Rauzer attack, 7...Be7 defence, 9...Nxd4"]

e4 c5 Nf3 d6 d4 cxd4 Nxd4 Nf6 Nc3 Nc6 Bg5 e6 Qd2 Be7 O-O-O O-O f4 Nxd4 Qxd4 *

[ECO "B66"]
[Opening "Sicilian"]
[Variation "Richter-Rauzer, Rauzer attack, 7...a6"]

e4 c5 Nf3 d6 d4 cxd4 Nxd4 Nf6 Nc3 Nc6 Bg5 e6 Qd2 a6 *

[ECO "B67"]
[Opening "Sicilian"]
[Variation "Richter-Rauzer, Rauzer attack, 7...a6 defence, 8...Bd7"]

e4 c5 Nf3 d6 d4 cxd4 Nxd4 Nf6 Nc3 Nc6 Bg5 e6 Qd2 a6 O-O-O Bd7 *

[ECO "B68"]
[Opening "Sicilian"]
[Variation "Richter-Rauzer, Rauzer attack, 7...a6 defence, 9...Be7"]

e4 c5 Nf3 d6 d4 cxd4 Nxd4 Nf6 Nc3 Nc6 Bg5 e6 Qd2 a6 O-O-O Bd7 f4 Be7 *

[ECO "B69"]
[Opening "Sicilian"]
[Variation "Richter-Rauzer, Rauzer attack, 7...a6 defence, 11.Bxf6"]

e4 c5 Nf3 d6 d4 cxd4 Nxd4 Nf6 Nc3 Nc6 Bg5 e6 Qd2 a6 O-O-O Bd7 f4 Be7 Nf3 b5 Bxf6 *

[ECO "B70"]
[Opening "Sicilian"]
[Variation "dragon variation"]

e4 c5 Nf3 d6 d4 cxd4 Nxd4 Nf6 Nc3 g6 *

[ECO "B71"]
[Opening "Sicilian"]
[Variation "dragon, Levenfish variation"]

e4 c5 Nf3 d6 d4 cxd4 Nxd4 Nf6 Nc3 g6 f4 *

[ECO "B71"]
[Opening "Sicilian"]
[Variation "dragon, Levenfish; Flohr variation"]

e4 c5 Nf3 d6 d4 cxd4 Nxd4 Nf6 Nc3 g6 f4 Nbd7 *

[ECO "B72"]
[Opening "Sicilian"]
[Variation "dragon, 6.Be3"]

e4 c5 Nf3 d6 d4 cxd4 Nxd4 Nf6 Nc3 g6 Be3 *

[ECO "B72"]
[Opening "Sicilian"]
[Variation "dragon, classical attack"]

e4 c5 Nf3 d6 d4 cxd4 Nxd4 Nf6 Nc3 g6 Be3 Bg7 Be2 *

[ECO "B72"]
[Opening "Sicilian"]
[Variation "dragon, classical, Amsterdam variation"]

e4 c5 Nf3 d6 d4 cxd4 Nxd4 Nf6 Nc3 g6 Be3 Bg7 Be2 Nc6 Qd2 *

[ECO "B72"]
[Opening "Sicilian"]
[Variation "dragon, classical, Grigoriev variation"]

e4 c5 Nf3 d6 d4 cxd4 Nxd4 Nf6 Nc3 g6 Be3 Bg7 Be2 Nc6 Qd2 O-O O-O-O *

[ECO "B72"]
[Opening "Sicilian"]
[Variation "dragon, classical, Nottingham variation"]

e4 c5 Nf3 d6 d4 cxd4 Nxd4 Nf6 Nc3 g6 Be3 Bg7 Be2 Nc6 Nb3 *

[ECO "B73"]
[Opening "Sicilian"]
[Variation "dragon, classical, 8.O-O"]

e4 c5 Nf3 d6 d4 cxd4 Nxd4 Nf6 Nc3 g6 Be3 Bg7 Be2 Nc6 O-O *

[ECO "B73"]
[Opening "Sicilian"]
[Variation "dragon, classical, Zollner gambit"]

e4 c5 Nf3 d6 d4 cxd4 Nxd4 Nf6 Nc3 g6 Be3 Bg7 Be2 Nc6 O-O O-O f4 Qb6 e5 *

[ECO "B73"]
[Opening "Sicilian"]
[Variation "dragon, classical, Richter variation"]

e4 c5 Nf3 d6 d4 cxd4 Nxd4 Nf6 Nc3 g6 Be3 Bg7 Be2 Nc6 O-O O-O Qd2 *

[ECO "B74"]
[Opening "Sicilian"]
[Variation "dragon, classical, 9.Nb3"]

e4 c5 Nf3 d6 d4 cxd4 Nxd4 Nf6 Nc3 g6 Be3 Bg7 Be2 Nc6 O-O O-O Nb3 *

[ECO "B74"]
[Opening "Sicilian"]
[Variation "dragon, classical, Stockholm attack"]

e4 c5 Nf3 d6 d4 cxd4 Nxd4 Nf6 Nc3 g6 Be3 Bg7 Be2 Nc6 O-O O-O Nb3 Be6 f4 Na5 f5 Bc4 Nxa5 Bxe2 Qxe2 Qxa5 g4 *

[ECO "B74"]
[Opening "Sicilian"]
[Variation "dragon, classical, Spielmann variation"]

e4 c5 Nf3 d6 d4 cxd4 Nxd4 Nf6 Nc3 g6 Be3 Bg7 Be2 Nc6 O-O O-O Nb3 Be6 f4 Na5 f5 Bc4 Bd3 *

[ECO "B74"]
[Opening "Sicilian"]
[Variation "dragon, classical, Bernard defence"]

e4 c5 Nf3 d6 d4 cxd4 Nxd4 Nf6 Nc3 g6 Be3 Bg7 Be2 Nc6 O-O O-O Nb3 Be6 f4 Na5 f5 Bc4 Bd3 Bxd3 cxd3 d5 *

[ECO "B74"]
[Opening "Sicilian"]
[Variation "dragon, classical, Reti-Tartakower variation"]

e4 c5 Nf3 d6 d4 cxd4 Nxd4 Nf6 Nc3 g6 Be3 Bg7 Be2 Nc6 O-O O-O Nb3 Be6 f4 Qc8 *

[ECO "B74"]
[Opening "Sicilian"]
[Variation "dragon, classical, Alekhine variation"]

e4 c5 Nf3 d6 d4 cxd4 Nxd4 Nf6 Nc3 g6 Be3 Bg7 Be2 Nc6 O-O O-O Nb3 a5 *

[ECO "B75"]
[Opening "Sicilian"]
[Variation "dragon, Yugoslav attack"]

e4 c5 Nf3 d6 d4 cxd4 Nxd4 Nf6 Nc3 g6 Be3 Bg7 f3 *

[ECO "B76"]
[Opening "Sicilian"]
[Variation "dragon, Yugoslav attack, 7...O-O"]

e4 c5 Nf3 d6 d4 cxd4 Nxd4 Nf6 Nc3 g6 Be3 Bg7 f3 O-O *

[ECO "B76"]
[Opening "Sicilian"]
[Variation "dragon, Yugoslav attack, Rauser variation"]

e4 c5 Nf3 d6 d4 cxd4 Nxd4 Nf6 Nc3 g6 Be3 Bg7 f3 O-O Qd2 Nc6 O-O-O *

[ECO "B77"]
[Opening "Sicilian"]
[Variation "dragon, Yugoslav attack, 9.Bc4"]

e4 c5 Nf3 d6 d4 cxd4 Nxd4 Nf6 Nc3 g6 Be3 Bg7 f3 O-O Qd2 Nc6 Bc4 *

[ECO "B77"]
[Opening "Sicilian"]
[Variation "dragon, Yugoslav attack, Byrne variation"]

e4 c5 Nf3 d6 d4 cxd4 Nxd4 Nf6 Nc3 g6 Be3 Bg7 f3 O-O Qd2 Nc6 Bc4 a5 *

[ECO "B77"]
[Opening "Sicilian"]
[Variation "dragon, Yugoslav attack, 9...Bd7"]

e4 c5 Nf3 d6 d4 cxd4 Nxd4 Nf6 Nc3 g6 Be3 Bg7 f3 O-O Qd2 Nc6 Bc4 Bd7 *

[ECO "B78"]
[Opening "Sicilian"]
[Variation "dragon, Yugoslav attack, 10.O-O-O"]

e4 c5 Nf3 d6 d4 cxd4 Nxd4 Nf6 Nc3 g6 Be3 Bg7 f3 O-O Qd2 Nc6 Bc4 Bd7 O-O-O *

[ECO "B79"]
[Opening "Sicilian"]
[Variation "dragon, Yugoslav attack, 12.h4"]

e4 c5 Nf3 d6 d4 cxd4 Nxd4 Nf6 Nc3 g6 Be3 Bg7 f3 O-O Qd2 Nc6 Bc4 Bd7 O-O-O Qa5 Bb3 Rfc8 h4 *

[ECO "B80"]
[Opening "Sicilian"]
[Variation "Scheveningen variation"]

e4 c5 Nf3 d6 d4 cxd4 Nxd4 Nf6 Nc3 e6 *

[ECO "B80"]
[Opening "Sicilian"]
[Variation "Scheveningen, English variation"]

e4 c5 Nf3 d6 d4 cxd4 Nxd4 Nf6 Nc3 e6 Be3 a6 Qd2 *

[ECO "B80"]
[Opening "Sicilian"]
[Variation "Scheveningen, Vitolins variation"]

e4 c5 Nf3 d6 d4 cxd4 Nxd4 Nf6 Nc3 e6 Bb5+ *

[ECO "B80"]
[Opening "Sicilian"]
[Variation "Scheveningen, fianchetto variation"]

e4 c5 Nf3 d6 d4 cxd4 Nxd4 Nf6 Nc3 e6 g3 *

[ECO "B81"]
[Opening "Sicilian"]
[Variation "Scheveningen, Keres attack"]

e4 c5 Nf3 d6 d4 cxd4 Nxd4 Nf6 Nc3 e6 g4 *

[ECO "B82"]
[Opening "Sicilian"]
[Variation "Scheveningen, 6.f4"]

e4 c5 Nf3 d6 d4 cxd4 Nxd4 Nf6 Nc3 e6 f4 *

[ECO "B82"]
[Opening "Sicilian"]
[Variation "Scheveningen, Tal variation"]

e4 c5 Nf3 d6 d4 cxd4 Nxd4 Nf6 Nc3 e6 f4 Nc6 Be3 Be7 Qf3 *

[ECO "B83"]
[Opening "Sicilian"]
[Variation "Scheveningen, 6.Be2"]

e4 c5 Nf3 d6 d4 cxd4 Nxd4 Nf6 Nc3 e6 Be2 *

[ECO "B83"]
[Opening "Sicilian"]
[Variation "modern Scheveningen"]

e4 c5 Nf3 d6 d4 cxd4 Nxd4 Nf6 Nc3 e6 Be2 Nc6 *

[ECO "B83"]
[Opening "Sicilian"]
[Variation "modern Scheveningen, main line"]

e4 c5 Nf3 d6 d4 cxd4 Nxd4 Nf6 Nc3 e6 Be2 Nc6 O-O Be7 Be3 O-O f4 *

[ECO "B83"]
[Opening "Sicilian"]
[Variation "modern Scheveningen, main line with Nb3"]

e4 c5 Nf3 d6 d4 cxd4 Nxd4 Nf6 Nc3 e6 Be2 Nc6 O-O Be7 Be3 O-O f4 Bd7 Nb3 *

[ECO "B84"]
[Opening "Sicilian"]
[Variation "Scheveningen (Paulsen), classical variation"]

e4 c5 Nf3 d6 d4 cxd4 Nxd4 Nf6 Nc3 e6 Be2 a6 *

[ECO "B84"]
[Opening "Sicilian"]
[Variation "Scheveningen, classical, Nd7 system"]

e4 c5 Nf3 d6 d4 cxd4 Nxd4 Nf6 Nc3 e6 Be2 a6 O-O Nbd7 *

[ECO "B84"]
[Opening "Sicilian"]
[Variation "Scheveningen (Paulsen), classical variation"]

e4 c5 Nf3 d6 d4 cxd4 Nxd4 Nf6 Nc3 e6 Be2 a6 O-O Qc7 *

[ECO "B85"]
[Opening "Sicilian"]
[Variation "Scheveningen, classical variation with ...Qc7 and ...Nc6"]

e4 c5 Nf3 d6 d4 cxd4 Nxd4 Nf6 Nc3 e6 Be2 a6 O-O Qc7 f4 Nc6 *

[ECO "B85"]
[Opening "Sicilian"]
[Variation "Scheveningen, classical, Maroczy system"]

e4 c5 Nf3 d6 d4 cxd4 Nxd4 Nf6 Nc3 e6 Be2 a6 O-O Qc7 f4 Nc6 Kh1 Be7 a4 *

[ECO "B85"]
[Opening "Sicilian"]
[Variation "Scheveningen, classical"]

e4 c5 Nf3 d6 d4 cxd4 Nxd4 Nf6 Nc3 e6 Be2 a6 O-O Qc7 f4 Nc6 Be3 *

[ECO "B85"]
[Opening "Sicilian"]
[Variation "Scheveningen, classical main line"]

e4 c5 Nf3 d6 d4 cxd4 Nxd4 Nf6 Nc3 e6 Be2 a6 O-O Qc7 f4 Nc6 Be3 Be7 Qe1 O-O *

[ECO "B86"]
[Opening "Sicilian"]
[Variation "Sozin attack"]

e4 c5 Nf3 d6 d4 cxd4 Nxd4 Nf6 Nc3 e6 Bc4 *

[ECO "B87"]
[Opening "Sicilian"]
[Variation "Sozin with ...a6 and ...b5"]

e4 c5 Nf3 d6 d4 cxd4 Nxd4 Nf6 Nc3 e6 Bc4 a6 Bb3 b5 *

[ECO "B88"]
[Opening "Sicilian"]
[Variation "Sozin, Leonhardt variation"]

e4 c5 Nf3 d6 d4 cxd4 Nxd4 Nf6 Nc3 e6 Bc4 Nc6 *

[ECO "B88"]
[Opening "Sicilian"]
[Variation "Sozin, Fischer variation"]

e4 c5 Nf3 d6 d4 cxd4 Nxd4 Nf6 Nc3 e6 Bc4 Nc6 Bb3 Be7 Be3 O-O f4 *

[ECO "B89"]
[Opening "Sicilian"]
[Variation "Sozin, 7.Be3"]

e4 c5 Nf3 d6 d4 cxd4 Nxd4 Nf6 Nc3 e6 Bc4 Nc6 Be3 *

[ECO "B89"]
[Opening "Sicilian"]
[Variation "Velimirovic attack"]

e4 c5 Nf3 d6 d4 cxd4 Nxd4 Nf6 Nc3 e6 Bc4 Nc6 Be3 Be7 Qe2 *

[ECO "B90"]
[Opening "Sicilian"]
[Variation "Najdorf"]

e4 c5 Nf3 d6 d4 cxd4 Nxd4 Nf6 Nc3 a6 *

[ECO "B90"]
[Opening "Sicilian"]
[Variation "Najdorf, Adams attack"]

e4 c5 Nf3 d6 d4 cxd4 Nxd4 Nf6 Nc3 a6 h3 *

[ECO "B90"]
[Opening "Sicilian"]
[Variation "Najdorf, Lipnitzky attack"]

e4 c5 Nf3 d6 d4 cxd4 Nxd4 Nf6 Nc3 a6 Bc4 *

[ECO "B90"]
[Opening "Sicilian"]
[Variation "Najdorf, Byrne (English) attack"]

e4 c5 Nf3 d6 d4 cxd4 Nxd4 Nf6 Nc3 a6 Be3 *

[ECO "B91"]
[Opening "Sicilian"]
[Variation "Najdorf, Zagreb (fianchetto) variation"]

e4 c5 Nf3 d6 d4 cxd4 Nxd4 Nf6 Nc3 a6 g3 *

[ECO "B92"]
[Opening "Sicilian"]
[Variation "Najdorf, Opočenský variation"]

e4 c5 Nf3 d6 d4 cxd4 Nxd4 Nf6 Nc3 a6 Be2 *

[ECO "B93"]
[Opening "Sicilian"]
[Variation "Najdorf, 6.f4"]

e4 c5 Nf3 d6 d4 cxd4 Nxd4 Nf6 Nc3 a6 f4 *

[ECO "B94"]
[Opening "Sicilian"]
[Variation "Najdorf, 6.Bg5"]

e4 c5 Nf3 d6 d4 cxd4 Nxd4 Nf6 Nc3 a6 Bg5 *

[ECO "B94"]
[Opening "Sicilian"]
[Variation "Najdorf, Ivkov variation"]

e4 c5 Nf3 d6 d4 cxd4 Nxd4 Nf6 Nc3 a6 Bg5 Nbd7 Bc4 Qa5 Qd2 e6 O-O-O b5 Bb3 Bb7 Rhe1 Nc5 e5 *

[ECO "B95"]
[Opening "Sicilian"]
[Variation "Najdorf, 6...e6"]

e4 c5 Nf3 d6 d4 cxd4 Nxd4 Nf6 Nc3 a6 Bg5 e6 *

[ECO "B96"]
[Opening "Sicilian"]
[Variation "Najdorf, 7.f4"]

e4 c5 Nf3 d6 d4 cxd4 Nxd4 Nf6 Nc3 a6 Bg5 e6 f4 *

[ECO "B96"]
[Opening "Sicilian"]
[Variation "Najdorf, Polugayevsky variation"]

e4 c5 Nf3 d6 d4 cxd4 Nxd4 Nf6 Nc3 a6 Bg5 e6 f4 b5 *

[ECO "B96"]
[Opening "Sicilian"]
[Variation "Najdorf, Polugayevsky, Simagin variation"]

e4 c5 Nf3 d6 d4 cxd4 Nxd4 Nf6 Nc3 a6 Bg5 e6 f4 b5 e5 dxe5 fxe5 Qc7 Qe2 *

[ECO "B97"]
[Opening "Sicilian"]
[Variation "Najdorf, 7...Qb6"]

e4 c5 Nf3 d6 d4 cxd4 Nxd4 Nf6 Nc3 a6 Bg5 e6 f4 Qb6 *

[ECO "B97"]
[Opening "Sicilian"]
[Variation "Najdorf, Poisoned pawn variation"]

e4 c5 Nf3 d6 d4 cxd4 Nxd4 Nf6 Nc3 a6 Bg5 e6 f4 Qb6 Qd2 Qxb2 Rb1 Qa3 *

[ECO "B98"]
[Opening "Sicilian"]
[Variation "Najdorf, 7...Be7"]

e4 c5 Nf3 d6 d4 cxd4 Nxd4 Nf6 Nc3 a6 Bg5 e6 f4 Be7 *

[ECO "B98"]
[Opening "Sicilian"]
[Variation "Najdorf, Browne variation"]

e4 c5 Nf3 d6 d4 cxd4 Nxd4 Nf6 Nc3 a6 Bg5 e6 f4 Be7 Qf3 h6 Bh4 Qc7 *

[ECO "B98"]
[Opening "Sicilian"]
[Variation "Najdorf, Göteborg (Argentine) variation"]

e4 c5 Nf3 d6 d4 cxd4 Nxd4 Nf6 Nc3 a6 Bg5 e6 f4 Be7 Qf3 h6 Bh4 g5 *

[ECO "B98"]
[Opening "Sicilian"]
[Variation "Najdorf variation"]

e4 c5 Nf3 d6 d4 cxd4 Nxd4 Nf6 Nc3 a6 Bg5 e6 f4 Be7 Qf3 Qc7 *

[ECO "B99"]
[Opening "Sicilian"]
[Variation "Najdorf, 7...Be7 main line"]

e4 c5 Nf3 d6 d4 cxd4 Nxd4 Nf6 Nc3 a6 Bg5 e6 f4 Be7 Qf3 Qc7 O-O-O Nbd7 *

[ECO "C00"]
[Opening "French defence"]

e4 e6 *

[ECO "C00"]
[Opening "French defence, Steiner variation"]

e4 e6 c4 *

[ECO "C00"]
[Opening "French"]
[Variation "Reti (Spielmann) variation"]

e4 e6 b3 *

[ECO "C00"]
[Opening "French"]
[Variation "Steinitz attack"]

e4 e6 e5 *

[ECO "C00"]
[Opening "French"]
[Variation "Labourdonnais variation"]

e4 e6 f4 *

[ECO "C00"]
[Opening "French defence"]

e4 e6 Nf3 *

[ECO "C00"]
[Opening "French"]
[Variation "Wing gambit"]

e4 e6 Nf3 d5 e5 c5 b4 *

[ECO "C00"]
[Opening "French defence"]

e4 e6 Nc3 *

[ECO "C00"]
[Opening "French"]
[Variation "Pelikan variation"]

e4 e6 Nc3 d5 f4 *

[ECO "C00"]
[Opening "French"]
[Variation "Two knights variation"]

e4 e6 Nc3 d5 Nf3 *

[ECO "C00"]
[Opening "French"]
[Variation "Chigorin variation"]

e4 e6 Qe2 *

[ECO "C00"]
[Opening "French"]
[Variation "King's Indian attack"]

e4 e6 d3 *

[ECO "C00"]
[Opening "French"]
[Variation "Reversed Philidor formation"]

e4 e6 d3 d5 Nd2 Nf6 Ngf3 Nc6 Be2 *

[ECO "C00"]
[Opening "French defence"]

e4 e6 d4 *

[ECO "C00"]
[Opening "Lengfellner system"]

e4 e6 d4 d6 *

[ECO "C00"]
[Opening "St. George defence"]

e4 e6 d4 a6 *

[ECO "C00"]
[Opening "French defence"]

e4 e6 d4 d5 *

[ECO "C00"]
[Opening "French"]
[Variation "Schlechter variation"]

e4 e6 d4 d5 Bd3 *

[ECO "C00"]
[Opening "French"]
[Variation "Alapin variation"]

e4 e6 d4 d5 Be3 *

[ECO "C01"]
[Opening "French"]
[Variation "exchange variation"]

e4 e6 d4 d5 exd5 *

[ECO "C01"]
[Opening "French"]
[Variation "exchange, Svenonius variation"]

e4 e6 d4 d5 exd5 exd5 Nc3 Nf6 Bg5 *

[ECO "C01"]
[Opening "French"]
[Variation "exchange, Bogolyubov variation"]

e4 e6 d4 d5 exd5 exd5 Nc3 Nf6 Bg5 Nc6 *

[ECO "C02"]
[Opening "French"]
[Variation "advance variation"]

e4 e6 d4 d5 e5 *

[ECO "C02"]
[Opening "French"]
[Variation "advance, Steinitz variation"]

e4 e6 d4 d5 e5 c5 dxc5 *

[ECO "C02"]
[Opening "French"]
[Variation "advance, Nimzovich variation"]

e4 e6 d4 d5 e5 c5 Qg4 *

[ECO "C02"]
[Opening "French"]
[Variation "advance, Nimzovich system"]

e4 e6 d4 d5 e5 c5 Nf3 *

[ECO "C02"]
[Opening "French"]
[Variation "advance variation"]

e4 e6 d4 d5 e5 c5 c3 *

[ECO "C02"]
[Opening "French"]
[Variation "advance, Wade variation"]

e4 e6 d4 d5 e5 c5 c3 Qb6 Nf3 Bd7 *

[ECO "C02"]
[Opening "French"]
[Variation "advance variation"]

e4 e6 d4 d5 e5 c5 c3 Nc6 *

[ECO "C02"]
[Opening "French"]
[Variation "advance, Paulsen attack"]

e4 e6 d4 d5 e5 c5 c3 Nc6 Nf3 *

[ECO "C02"]
[Opening "French"]
[Variation "advance, Milner-Barry gambit"]

e4 e6 d4 d5 e5 c5 c3 Nc6 Nf3 Qb6 Bd3 *

[ECO "C02"]
[Opening "French"]
[Variation "advance, Euwe variation"]

e4 e6 d4 d5 e5 c5 c3 Nc6 Nf3 Bd7 *

[ECO "C03"]
[Opening "French"]
[Variation "Tarrasch"]

e4 e6 d4 d5 Nd2 *

[ECO "C03"]
[Opening "French"]
[Variation "Tarrasch, Haberditz variation"]

e4 e6 d4 d5 Nd2 f5 *

[ECO "C03"]
[Opening "French"]
[Variation "Tarrasch, Guimard variation"]

e4 e6 d4 d5 Nd2 Nc6 *

[ECO "C04"]
[Opening "French"]
[Variation "Tarrasch, Guimard main line"]

e4 e6 d4 d5 Nd2 Nc6 Ngf3 Nf6 *

[ECO "C05"]
[Opening "French"]
[Variation "Tarrasch, closed variation"]

e4 e6 d4 d5 Nd2 Nf6 *

[ECO "C05"]
[Opening "French"]
[Variation "Tarrasch, Botvinnik variation"]

e4 e6 d4 d5 Nd2 Nf6 e5 Nfd7 Bd3 c5 c3 b6 *

[ECO "C05"]
[Opening "French"]
[Variation "Tarrasch, closed variation"]

e4 e6 d4 d5 Nd2 Nf6 e5 Nfd7 Bd3 c5 c3 Nc6 *

[ECO "C06"]
[Opening "French"]
[Variation "Tarrasch, closed variation, main line"]

e4 e6 d4 d5 Nd2 Nf6 e5 Nfd7 Bd3 c5 c3 Nc6 Ne2 cxd4 cxd4 *

[ECO "C06"]
[Opening "French"]
[Variation "Tarrasch, Leningrad variation"]

e4 e6 d4 d5 Nd2 Nf6 e5 Nfd7 Bd3 c5 c3 Nc6 Ne2 cxd4 cxd4 Nb6 *

[ECO "C07"]
[Opening "French"]
[Variation "Tarrasch, open variation"]

e4 e6 d4 d5 Nd2 c5 *

[ECO "C07"]
[Opening "French"]
[Variation "Tarrasch, Eliskases variation"]

e4 e6 d4 d5 Nd2 c5 exd5 Qxd5 Ngf3 cxd4 Bc4 Qd8 *

[ECO "C08"]
[Opening "French"]
[Variation "Tarrasch, open, 4.ed ed"]

e4 e6 d4 d5 Nd2 c5 exd5 exd5 *

[ECO "C09"]
[Opening "French"]
[Variation "Tarrasch, open variation, main line"]

e4 e6 d4 d5 Nd2 c5 exd5 exd5 Ngf3 Nc6 *

[ECO "C10"]
[Opening "French"]
[Variation "Paulsen variation"]

e4 e6 d4 d5 Nc3 *

[ECO "C10"]
[Opening "French"]
[Variation "Marshall variation"]

e4 e6 d4 d5 Nc3 c5 *

[ECO "C10"]
[Opening "French"]
[Variation "Rubinstein variation"]

e4 e6 d4 d5 Nc3 dxe4 *

[ECO "C10"]
[Opening "French"]
[Variation "Fort Knox variation"]

e4 e6 d4 d5 Nc3 dxe4 Nxe4 Bd7 Nf3 Bc6 *

[ECO "C10"]
[Opening "French"]
[Variation "Rubinstein variation"]

e4 e6 d4 d5 Nc3 dxe4 Nxe4 Nd7 *

[ECO "C10"]
[Opening "French"]
[Variation "Rubinstein, Capablanca line"]

e4 e6 d4 d5 Nc3 dxe4 Nxe4 Nd7 Nf3 Ngf6 Nxf6+ Nxf6 Ne5 *

[ECO "C10"]
[Opening "French"]
[Variation "Frere (Becker) variation"]

e4 e6 d4 d5 Nc3 dxe4 Nxe4 Qd5 *

[ECO "C11"]
[Opening "French defence"]

e4 e6 d4 d5 Nc3 Nf6 *

[ECO "C11"]
[Opening "French"]
[Variation "Swiss variation"]

e4 e6 d4 d5 Nc3 Nf6 Bd3 *

[ECO "C11"]
[Opening "French"]
[Variation "Henneberger variation"]

e4 e6 d4 d5 Nc3 Nf6 Be3 *

[ECO "C11"]
[Opening "French"]
[Variation "Steinitz variation"]

e4 e6 d4 d5 Nc3 Nf6 e5 *

[ECO "C11"]
[Opening "French"]
[Variation "Steinitz, Bradford attack"]

e4 e6 d4 d5 Nc3 Nf6 e5 Nfd7 f4 c5 dxc5 Bxc5 Qg4 *

[ECO "C11"]
[Opening "French"]
[Variation "Steinitz variation"]

e4 e6 d4 d5 Nc3 Nf6 e5 Nfd7 f4 c5 dxc5 Nc6 *

[ECO "C11"]
[Opening "French"]
[Variation "Steinitz, Brodsky-Jones variation"]

e4 e6 d4 d5 Nc3 Nf6 e5 Nfd7 f4 c5 dxc5 Nc6 a3 Bxc5 Qg4 O-O Nf3 f6 *

[ECO "C11"]
[Opening "French"]
[Variation "Steinitz variation"]

e4 e6 d4 d5 Nc3 Nf6 e5 Nfd7 f4 c5 Nf3 *

[ECO "C11"]
[Opening "French"]
[Variation "Steinitz, Boleslavsky variation"]

e4 e6 d4 d5 Nc3 Nf6 e5 Nfd7 f4 c5 Nf3 Nc6 Be3 *

[ECO "C11"]
[Opening "French"]
[Variation "Steinitz, Gledhill attack"]

e4 e6 d4 d5 Nc3 Nf6 e5 Nfd7 Qg4 *

[ECO "C11"]
[Opening "French"]
[Variation "Burn variation"]

e4 e6 d4 d5 Nc3 Nf6 Bg5 dxe4 *

[ECO "C12"]
[Opening "French"]
[Variation "MacCutcheon variation"]

e4 e6 d4 d5 Nc3 Nf6 Bg5 Bb4 *

[ECO "C12"]
[Opening "French"]
[Variation "MacCutcheon, Bogolyubov variation"]

e4 e6 d4 d5 Nc3 Nf6 Bg5 Bb4 exd5 Qxd5 Bxf6 gxf6 Qd2 Qa5 *

[ECO "C12"]
[Opening "French"]
[Variation "MacCutcheon, advance variation"]

e4 e6 d4 d5 Nc3 Nf6 Bg5 Bb4 e5 *

[ECO "C12"]
[Opening "French"]
[Variation "MacCutcheon, Chigorin variation"]

e4 e6 d4 d5 Nc3 Nf6 Bg5 Bb4 e5 h6 exf6 *

[ECO "C12"]
[Opening "French"]
[Variation "MacCutcheon, Grigoriev variation"]

e4 e6 d4 d5 Nc3 Nf6 Bg5 Bb4 e5 h6 exf6 hxg5 fxg7 Rg8 h4 gxh4 Qg4 *

[ECO "C12"]
[Opening "French"]
[Variation "MacCutcheon, Bernstein variation"]

e4 e6 d4 d5 Nc3 Nf6 Bg5 Bb4 e5 h6 Bh4 *

[ECO "C12"]
[Opening "French"]
[Variation "MacCutcheon, Janowski variation"]

e4 e6 d4 d5 Nc3 Nf6 Bg5 Bb4 e5 h6 Be3 *

[ECO "C12"]
[Opening "French"]
[Variation "MacCutcheon, Dr. Olland (Dutch) variation"]

e4 e6 d4 d5 Nc3 Nf6 Bg5 Bb4 e5 h6 Bc1 *

[ECO "C12"]
[Opening "French"]
[Variation "MacCutcheon, Tartakower variation"]

e4 e6 d4 d5 Nc3 Nf6 Bg5 Bb4 e5 h6 Bd2 Nfd7 *

[ECO "C12"]
[Opening "French"]
[Variation "MacCutcheon, Lasker variation"]

e4 e6 d4 d5 Nc3 Nf6 Bg5 Bb4 e5 h6 Bd2 Bxc3 *

[ECO "C12"]
[Opening "French"]
[Variation "MacCutcheon, Duras variation"]

e4 e6 d4 d5 Nc3 Nf6 Bg5 Bb4 e5 h6 Bd2 Bxc3 bxc3 Ne4 Qg4 Kf8 Bc1 *

[ECO "C12"]
[Opening "French"]
[Variation "MacCutcheon, Lasker variation, 8...g6"]

e4 e6 d4 d5 Nc3 Nf6 Bg5 Bb4 e5 h6 Bd2 Bxc3 bxc3 Ne4 Qg4 g6 *

[ECO "C13"]
[Opening "French"]
[Variation "classical"]

e4 e6 d4 d5 Nc3 Nf6 Bg5 Be7 *

[ECO "C13"]
[Opening "French"]
[Variation "classical, Anderssen variation"]

e4 e6 d4 d5 Nc3 Nf6 Bg5 Be7 Bxf6 *

[ECO "C13"]
[Opening "French"]
[Variation "classical, Anderssen-Richter variation"]

e4 e6 d4 d5 Nc3 Nf6 Bg5 Be7 Bxf6 Bxf6 e5 Be7 Qg4 *

[ECO "C13"]
[Opening "French"]
[Variation "classical, Vistaneckis (Nimzovich) variation"]

e4 e6 d4 d5 Nc3 Nf6 Bg5 Be7 e5 Ng8 *

[ECO "C13"]
[Opening "French"]
[Variation "classical, Frankfurt variation"]

e4 e6 d4 d5 Nc3 Nf6 Bg5 Be7 e5 Ng8 Be3 b6 *

[ECO "C13"]
[Opening "French"]
[Variation "classical, Tartakower variation"]

e4 e6 d4 d5 Nc3 Nf6 Bg5 Be7 e5 Ne4 *

[ECO "C13"]
[Opening "French"]
[Variation "Albin-Alekhine-Chatard attack"]

e4 e6 d4 d5 Nc3 Nf6 Bg5 Be7 e5 Nfd7 h4 *

[ECO "C13"]
[Opening "French"]
[Variation "Albin-Alekhine-Chatard attack, Maroczy variation"]

e4 e6 d4 d5 Nc3 Nf6 Bg5 Be7 e5 Nfd7 h4 a6 *

[ECO "C13"]
[Opening "French"]
[Variation "Albin-Alekhine-Chatard attack, Breyer variation"]

e4 e6 d4 d5 Nc3 Nf6 Bg5 Be7 e5 Nfd7 h4 c5 *

[ECO "C13"]
[Opening "French"]
[Variation "Albin-Alekhine-Chatard attack, Teichmann variation"]

e4 e6 d4 d5 Nc3 Nf6 Bg5 Be7 e5 Nfd7 h4 f6 *

[ECO "C13"]
[Opening "French"]
[Variation "Albin-Alekhine-Chatard attack, Spielmann variation"]

e4 e6 d4 d5 Nc3 Nf6 Bg5 Be7 e5 Nfd7 h4 O-O *

[ECO "C14"]
[Opening "French"]
[Variation "classical variation"]

e4 e6 d4 d5 Nc3 Nf6 Bg5 Be7 e5 Nfd7 Bxe7 Qxe7 *

[ECO "C14"]
[Opening "French"]
[Variation "classical, Tarrasch variation"]

e4 e6 d4 d5 Nc3 Nf6 Bg5 Be7 e5 Nfd7 Bxe7 Qxe7 Bd3 *

[ECO "C14"]
[Opening "French"]
[Variation "classical, Rubinstein variation"]

e4 e6 d4 d5 Nc3 Nf6 Bg5 Be7 e5 Nfd7 Bxe7 Qxe7 Qd2 *

[ECO "C14"]
[Opening "French"]
[Variation "classical, Alapin variation"]

e4 e6 d4 d5 Nc3 Nf6 Bg5 Be7 e5 Nfd7 Bxe7 Qxe7 Nb5 *

[ECO "C14"]
[Opening "French"]
[Variation "classical, Pollock variation"]

e4 e6 d4 d5 Nc3 Nf6 Bg5 Be7 e5 Nfd7 Bxe7 Qxe7 Qg4 *

[ECO "C14"]
[Opening "French"]
[Variation "classical, Steinitz variation"]

e4 e6 d4 d5 Nc3 Nf6 Bg5 Be7 e5 Nfd7 Bxe7 Qxe7 f4 *

[ECO "C14"]
[Opening "French"]
[Variation "classical, Stahlberg variation"]

e4 e6 d4 d5 Nc3 Nf6 Bg5 Be7 e5 Nfd7 Bxe7 Qxe7 f4 O-O Nf3 c5 Qd2 Nc6 O-O-O c4 *

[ECO "C15"]
[Opening "French"]
[Variation "Winawer (Nimzovich) variation"]

e4 e6 d4 d5 Nc3 Bb4 *

[ECO "C15"]
[Opening "French"]
[Variation "Winawer, Kondratiyev variation"]

e4 e6 d4 d5 Nc3 Bb4 Bd3 c5 exd5 Qxd5 Bd2 *

[ECO "C15"]
[Opening "French"]
[Variation "Winawer, fingerslip variation"]

e4 e6 d4 d5 Nc3 Bb4 Bd2 *

[ECO "C15"]
[Opening "French"]
[Variation "Winawer, Alekhine (Maroczy) gambit"]

e4 e6 d4 d5 Nc3 Bb4 Ne2 *

[ECO "C15"]
[Opening "French"]
[Variation "Winawer, Alekhine gambit, Alatortsev variation"]

e4 e6 d4 d5 Nc3 Bb4 Ne2 dxe4 a3 Be7 Nxe4 Nf6 N2g3 O-O Be2 Nc6 *

[ECO "C15"]
[Opening "French"]
[Variation "Winawer, Alekhine gambit"]

e4 e6 d4 d5 Nc3 Bb4 Ne2 dxe4 a3 Bxc3+ *

[ECO "C15"]
[Opening "French"]
[Variation "Winawer, Alekhine gambit, Kan variation"]

e4 e6 d4 d5 Nc3 Bb4 Ne2 dxe4 a3 Bxc3+ Nxc3 Nc6 *

[ECO "C16"]
[Opening "French"]
[Variation "Winawer, advance variation"]

e4 e6 d4 d5 Nc3 Bb4 e5 *

[ECO "C16"]
[Opening "French"]
[Variation "Winawer, Petrosian variation"]

e4 e6 d4 d5 Nc3 Bb4 e5 Qd7 *

[ECO "C17"]
[Opening "French"]
[Variation "Winawer, advance variation"]

e4 e6 d4 d5 Nc3 Bb4 e5 c5 *

[ECO "C17"]
[Opening "French"]
[Variation "Winawer, advance, Bogolyubov variation"]

e4 e6 d4 d5 Nc3 Bb4 e5 c5 Bd2 *

[ECO "C17"]
[Opening "French"]
[Variation "Winawer, advance, Russian variation"]

e4 e6 d4 d5 Nc3 Bb4 e5 c5 Qg4 *

[ECO "C17"]
[Opening "French"]
[Variation "Winawer, advance, 5.a3"]

e4 e6 d4 d5 Nc3 Bb4 e5 c5 a3 *

[ECO "C17"]
[Opening "French"]
[Variation "Winawer, advance, Rauzer variation"]

e4 e6 d4 d5 Nc3 Bb4 e5 c5 a3 cxd4 axb4 dxc3 Nf3 *

[ECO "C18"]
[Opening "French"]
[Variation "Winawer, advance variation"]

e4 e6 d4 d5 Nc3 Bb4 e5 c5 a3 Bxc3+ bxc3 *

[ECO "C18"]
[Opening "French"]
[Variation "Winawer, classical variation"]

e4 e6 d4 d5 Nc3 Bb4 e5 c5 a3 Bxc3+ bxc3 Qc7 *

[ECO "C19"]
[Opening "French"]
[Variation "Winawer, advance, 6...Ne7"]

e4 e6 d4 d5 Nc3 Bb4 e5 c5 a3 Bxc3+ bxc3 Ne7 *

[ECO "C19"]
[Opening "French"]
[Variation "Winawer, advance, Smyslov variation"]

e4 e6 d4 d5 Nc3 Bb4 e5 c5 a3 Bxc3+ bxc3 Ne7 a4 *

[ECO "C19"]
[Opening "French"]
[Variation "Winawer, advance, positional main line"]

e4 e6 d4 d5 Nc3 Bb4 e5 c5 a3 Bxc3+ bxc3 Ne7 Nf3 *

[ECO "C19"]
[Opening "French"]
[Variation "Winawer, advance, poisoned pawn variation"]

e4 e6 d4 d5 Nc3 Bb4 e5 c5 a3 Bxc3+ bxc3 Ne7 Qg4 *

[ECO "C19"]
[Opening "French"]
[Variation "Winawer, advance, poisoned pawn, Euwe-Gligoric variation"]

e4 e6 d4 d5 Nc3 Bb4 e5 c5 a3 Bxc3+ bxc3 Ne7 Qg4 Qc7 Qxg7 Rg8 Qxh7 cxd4 Kd1 *

[ECO "C19"]
[Opening "French"]
[Variation "Winawer, advance, poisoned pawn, Konstantinopolsky variation"]

e4 e6 d4 d5 Nc3 Bb4 e5 c5 a3 Bxc3+ bxc3 Ne7 Qg4 Qc7 Qxg7 Rg8 Qxh7 cxd4 Ne2 *

[ECO "C20"]
[Opening "King's pawn game"]

e4 e5 *

[ECO "C20"]
[Opening "KP"]
[Variation "Indian opening"]

e4 e5 d3 *

[ECO "C20"]
[Opening "KP"]
[Variation "Mengarini's opening"]

e4 e5 a3 *

[ECO "C20"]
[Opening "KP"]
[Variation "King's head opening"]

e4 e5 f3 *

[ECO "C20"]
[Opening "KP"]
[Variation "Patzer opening"]

e4 e5 Qh5 *

[ECO "C20"]
[Opening "KP"]
[Variation "Napoleon's opening"]

e4 e5 Qf3 *

[ECO "C20"]
[Opening "KP"]
[Variation "Lopez opening"]

e4 e5 c3 *

[ECO "C20"]
[Opening "Alapin's opening"]

e4 e5 Ne2 *

[ECO "C21"]
[Opening "Centre game"]

e4 e5 d4 exd4 *

[ECO "C21"]
[Opening "Centre game, Kieseritsky variation"]

e4 e5 d4 exd4 Nf3 c5 Bc4 b5 *

[ECO "C21"]
[Opening "Halasz gambit"]

e4 e5 d4 exd4 f4 *

[ECO "C21"]
[Opening "Danish gambit"]

e4 e5 d4 exd4 c3 *

[ECO "C21"]
[Opening "Danish gambit"]
[Variation "Collijn defence"]

e4 e5 d4 exd4 c3 dxc3 Bc4 cxb2 Bxb2 Qe7 *

[ECO "C21"]
[Opening "Danish gambit"]
[Variation "Schlechter defence"]

e4 e5 d4 exd4 c3 dxc3 Bc4 cxb2 Bxb2 d5 *

[ECO "C21"]
[Opening "Danish gambit"]
[Variation "Sörensen defence"]

e4 e5 d4 exd4 c3 d5 *

[ECO "C21"]
[Opening "Centre game"]

e4 e5 d4 exd4 Qxd4 *

[ECO "C22"]
[Opening "Centre game"]

e4 e5 d4 exd4 Qxd4 Nc6 *

[ECO "C22"]
[Opening "Centre game"]
[Variation "Paulsen attack"]

e4 e5 d4 exd4 Qxd4 Nc6 Qe3 *

[ECO "C22"]
[Opening "Centre game"]
[Variation "Charousek variation"]

e4 e5 d4 exd4 Qxd4 Nc6 Qe3 Bb4+ c3 Be7 *

[ECO "C22"]
[Opening "Centre game"]
[Variation "l'Hermet variation"]

e4 e5 d4 exd4 Qxd4 Nc6 Qe3 f5 *

[ECO "C22"]
[Opening "Centre game"]
[Variation "Berger variation"]

e4 e5 d4 exd4 Qxd4 Nc6 Qe3 Nf6 *

[ECO "C22"]
[Opening "Centre game"]
[Variation "Kupreichik variation"]

e4 e5 d4 exd4 Qxd4 Nc6 Qe3 Nf6 Nc3 Bb4 Bd2 O-O O-O-O Re8 Bc4 d6 Nh3 *

[ECO "C22"]
[Opening "Centre game"]
[Variation "Hall variation"]

e4 e5 d4 exd4 Qxd4 Nc6 Qc4 *

[ECO "C23"]
[Opening "Bishop's opening"]

e4 e5 Bc4 *

[ECO "C23"]
[Opening "Bishop's opening"]
[Variation "Philidor counter-attack"]

e4 e5 Bc4 c6 *

[ECO "C23"]
[Opening "Bishop's opening"]
[Variation "Lisitsyn variation"]

e4 e5 Bc4 c6 d4 d5 exd5 cxd5 Bb5+ Bd7 Bxd7+ Nxd7 dxe5 Nxe5 Ne2 *

[ECO "C23"]
[Opening "Bishop's opening"]
[Variation "Calabrese counter-gambit"]

e4 e5 Bc4 f5 *

[ECO "C23"]
[Opening "Bishop's opening"]
[Variation "Calabrese counter-gambit, Jaenisch variation"]

e4 e5 Bc4 f5 d3 *

[ECO "C23"]
[Opening "Bishop's opening"]
[Variation "Classical variation"]

e4 e5 Bc4 Bc5 *

[ECO "C23"]
[Opening "Bishop's opening"]
[Variation "Lopez gambit"]

e4 e5 Bc4 Bc5 Qe2 Nc6 c3 Nf6 f4 *

[ECO "C23"]
[Opening "Bishop's opening"]
[Variation "Philidor variation"]

e4 e5 Bc4 Bc5 c3 *

[ECO "C23"]
[Opening "Bishop's opening"]
[Variation "Pratt variation"]

e4 e5 Bc4 Bc5 c3 Nf6 d4 exd4 e5 d5 exf6 dxc4 Qh5 O-O *

[ECO "C23"]
[Opening "Bishop's opening"]
[Variation "Lewis counter-gambit"]

e4 e5 Bc4 Bc5 c3 d5 *

[ECO "C23"]
[Opening "Bishop's opening"]
[Variation "del Rio variation"]

e4 e5 Bc4 Bc5 c3 Qg5 *

[ECO "C23"]
[Opening "Bishop's opening"]
[Variation "Lewis gambit"]

e4 e5 Bc4 Bc5 d4 *

[ECO "C23"]
[Opening "Bishop's opening"]
[Variation "Wing gambit"]

e4 e5 Bc4 Bc5 b4 *

[ECO "C23"]
[Opening "Bishop's opening"]
[Variation "MacDonnell double gambit"]

e4 e5 Bc4 Bc5 b4 Bxb4 f4 *

[ECO "C23"]
[Opening "Bishop's opening"]
[Variation "Four pawns' gambit"]

e4 e5 Bc4 Bc5 b4 Bxb4 f4 exf4 Nf3 Be7 d4 Bh4+ g3 fxg3 O-O gxh2+ Kh1 *

[ECO "C24"]
[Opening "Bishop's opening"]
[Variation "Berlin defence"]

e4 e5 Bc4 Nf6 *

[ECO "C24"]
[Opening "Bishop's opening"]
[Variation "Greco gambit"]

e4 e5 Bc4 Nf6 f4 *

[ECO "C24"]
[Opening "Bishop's opening"]
[Variation "Ponziani gambit"]

e4 e5 Bc4 Nf6 d4 *

[ECO "C24"]
[Opening "Bishop's opening"]
[Variation "Urusov gambit"]

e4 e5 Bc4 Nf6 d4 exd4 Nf3 *

[ECO "C24"]
[Opening "Bishop's opening"]
[Variation "Urusov gambit, Panov variation"]

e4 e5 Bc4 Nf6 d4 exd4 Nf3 d5 exd5 Bb4+ c3 Qe7+ *

[ECO "C25"]
[Opening "Vienna game"]

e4 e5 Nc3 *

[ECO "C25"]
[Opening "Vienna"]
[Variation "Zhuravlev countergambit"]

e4 e5 Nc3 Bb4 Qg4 Nf6 *

[ECO "C25"]
[Opening "Vienna game, Max Lange defence"]

e4 e5 Nc3 Nc6 *

[ECO "C25"]
[Opening "Vienna"]
[Variation "Paulsen variation"]

e4 e5 Nc3 Nc6 g3 *

[ECO "C25"]
[Opening "Vienna"]
[Variation "Fyfe gambit"]

e4 e5 Nc3 Nc6 d4 *

[ECO "C25"]
[Opening "Vienna gambit"]

e4 e5 Nc3 Nc6 f4 *

[ECO "C25"]
[Opening "Vienna"]
[Variation "Steinitz gambit"]

e4 e5 Nc3 Nc6 f4 exf4 d4 *

[ECO "C25"]
[Opening "Vienna"]
[Variation "Steinitz gambit, Zukertort defence"]

e4 e5 Nc3 Nc6 f4 exf4 d4 Qh4+ Ke2 d5 *

[ECO "C25"]
[Opening "Vienna"]
[Variation "Steinitz gambit, Fraser-Minckwitz variation"]

e4 e5 Nc3 Nc6 f4 exf4 d4 Qh4+ Ke2 b6 *

[ECO "C25"]
[Opening "Vienna gambit"]

e4 e5 Nc3 Nc6 f4 exf4 Nf3 *

[ECO "C25"]
[Opening "Vienna"]
[Variation "Hamppe-Allgaier gambit"]

e4 e5 Nc3 Nc6 f4 exf4 Nf3 g5 h4 g4 Ng5 *

[ECO "C25"]
[Opening "Vienna"]
[Variation "Hamppe-Allgaier gambit, Alapin variation"]

e4 e5 Nc3 Nc6 f4 exf4 Nf3 g5 h4 g4 Ng5 d6 *

[ECO "C25"]
[Opening "Vienna"]
[Variation "Hamppe-Muzio gambit"]

e4 e5 Nc3 Nc6 f4 exf4 Nf3 g5 Bc4 g4 O-O *

[ECO "C25"]
[Opening "Vienna"]
[Variation "Hamppe-Muzio, Dubois variation"]

e4 e5 Nc3 Nc6 f4 exf4 Nf3 g5 Bc4 g4 O-O gxf3 Qxf3 Ne5 Qxf4 Qf6 *

[ECO "C25"]
[Opening "Vienna"]
[Variation "Pierce gambit"]

e4 e5 Nc3 Nc6 f4 exf4 Nf3 g5 d4 *

[ECO "C25"]
[Opening "Vienna"]
[Variation "Pierce gambit, Rushmere attack"]

e4 e5 Nc3 Nc6 f4 exf4 Nf3 g5 d4 g4 Bc4 gxf3 O-O d5 exd5 Bg4 dxc6 *

[ECO "C26"]
[Opening "Vienna"]
[Variation "Falkbeer variation"]

e4 e5 Nc3 Nf6 *

[ECO "C26"]
[Opening "Vienna"]
[Variation "Mengarini variation"]

e4 e5 Nc3 Nf6 a3 *

[ECO "C26"]
[Opening "Vienna"]
[Variation "Paulsen-Mieses variation"]

e4 e5 Nc3 Nf6 g3 *

[ECO "C26"]
[Opening "Vienna game"]

e4 e5 Nc3 Nf6 Bc4 *

[ECO "C27"]
[Opening "Vienna game"]

e4 e5 Nc3 Nf6 Bc4 Nxe4 *

[ECO "C27"]
[Opening "Vienna"]
[Variation "`Frankenstein-Dracula' variation"]

e4 e5 Nc3 Nf6 Bc4 Nxe4 Qh5 Nd6 Bb3 Nc6 Nb5 g6 Qf3 f5 Qd5 Qe7 Nxc7+ Kd8 Nxa8 b6 *

[ECO "C27"]
[Opening "Vienna"]
[Variation "Adams' gambit"]

e4 e5 Nc3 Nf6 Bc4 Nxe4 Qh5 Nd6 Bb3 Nc6 d4 *

[ECO "C27"]
[Opening "Vienna game"]

e4 e5 Nc3 Nf6 Bc4 Nxe4 Qh5 Nd6 Bb3 Be7 *

[ECO "C27"]
[Opening "Vienna"]
[Variation "Alekhine variation"]

e4 e5 Nc3 Nf6 Bc4 Nxe4 Qh5 Nd6 Bb3 Be7 Nf3 Nc6 Nxe5 *

[ECO "C27"]
[Opening "Boden-Kieseritsky gambit"]

e4 e5 Nc3 Nf6 Bc4 Nxe4 Nf3 *

[ECO "C27"]
[Opening "Boden-Kieseritsky gambit"]
[Variation "Lichtenhein defence"]

e4 e5 Nc3 Nf6 Bc4 Nxe4 Nf3 d5 *

[ECO "C28"]
[Opening "Vienna game"]

e4 e5 Nc3 Nf6 Bc4 Nc6 *

[ECO "C29"]
[Opening "Vienna gambit"]

e4 e5 Nc3 Nf6 f4 d5 *

[ECO "C29"]
[Opening "Vienna gambit"]
[Variation "Kaufmann variation"]

e4 e5 Nc3 Nf6 f4 d5 fxe5 Nxe4 Nf3 Bg4 Qe2 *

[ECO "C29"]
[Opening "Vienna gambit"]
[Variation "Breyer variation"]

e4 e5 Nc3 Nf6 f4 d5 fxe5 Nxe4 Nf3 Be7 *

[ECO "C29"]
[Opening "Vienna gambit"]
[Variation "Paulsen attack"]

e4 e5 Nc3 Nf6 f4 d5 fxe5 Nxe4 Qf3 *

[ECO "C29"]
[Opening "Vienna gambit"]
[Variation "Bardeleben variation"]

e4 e5 Nc3 Nf6 f4 d5 fxe5 Nxe4 Qf3 f5 *

[ECO "C29"]
[Opening "Vienna gambit"]
[Variation "Heyde variation"]

e4 e5 Nc3 Nf6 f4 d5 fxe5 Nxe4 Qf3 f5 d4 *

[ECO "C29"]
[Opening "Vienna gambit"]

e4 e5 Nc3 Nf6 f4 d5 fxe5 Nxe4 d3 *

[ECO "C29"]
[Opening "Vienna gambit, Würzburger trap"]

e4 e5 Nc3 Nf6 f4 d5 fxe5 Nxe4 d3 Qh4+ g3 Nxg3 Nf3 Qh5 Nxd5 *

[ECO "C29"]
[Opening "Vienna gambit, Steinitz variation"]

e4 e5 Nc3 Nf6 f4 d5 d3 *

[ECO "C30"]
[Opening "King's gambit"]

e4 e5 f4 *

[ECO "C30"]
[Opening "KGD"]
[Variation "Keene's defence"]

e4 e5 f4 Qh4+ g3 Qe7 *

[ECO "C30"]
[Opening "KGD"]
[Variation "Mafia defence"]

e4 e5 f4 c5 *

[ECO "C30"]
[Opening "KGD"]
[Variation "Norwalde variation"]

e4 e5 f4 Qf6 *

[ECO "C30"]
[Opening "KGD"]
[Variation "Norwalde variation, Buecker gambit"]

e4 e5 f4 Qf6 Nf3 Qxf4 Nc3 Bb4 Bc4 *

[ECO "C30"]
[Opening "KGD"]
[Variation "classical variation"]

e4 e5 f4 Bc5 *

[ECO "C30"]
[Opening "KGD"]
[Variation "classical, Svenonius variation"]

e4 e5 f4 Bc5 Nf3 d6 Nc3 Nf6 Bc4 Nc6 d3 Bg4 h3 Bxf3 Qxf3 exf4 *

[ECO "C30"]
[Opening "KGD"]
[Variation "classical, Hanham variation"]

e4 e5 f4 Bc5 Nf3 d6 Nc3 Nd7 *

[ECO "C30"]
[Opening "KGD"]
[Variation "classical, 4.c3"]

e4 e5 f4 Bc5 Nf3 d6 c3 *

[ECO "C30"]
[Opening "KGD"]
[Variation "classical, Marshall attack"]

e4 e5 f4 Bc5 Nf3 d6 c3 Bg4 fxe5 dxe5 Qa4+ *

[ECO "C30"]
[Opening "KGD"]
[Variation "classical counter-gambit"]

e4 e5 f4 Bc5 Nf3 d6 c3 f5 *

[ECO "C30"]
[Opening "KGD"]
[Variation "classical, Reti variation"]

e4 e5 f4 Bc5 Nf3 d6 c3 f5 fxe5 dxe5 d4 exd4 Bc4 *

[ECO "C30"]
[Opening "KGD"]
[Variation "classical, Soldatenkov variation"]

e4 e5 f4 Bc5 Nf3 d6 fxe5 *

[ECO "C30"]
[Opening "KGD"]
[Variation "classical, Heath variation"]

e4 e5 f4 Bc5 Nf3 d6 b4 *

[ECO "C30"]
[Opening "KGD"]
[Variation "2...Nf6"]

e4 e5 f4 Nf6 *

[ECO "C31"]
[Opening "KGD"]
[Variation "Falkbeer counter-gambit"]

e4 e5 f4 d5 *

[ECO "C31"]
[Opening "KGD"]
[Variation "Falkbeer, Tartakower variation"]

e4 e5 f4 d5 Nf3 *

[ECO "C31"]
[Opening "KGD"]
[Variation "Falkbeer, Milner-Barry variation"]

e4 e5 f4 d5 Nc3 *

[ECO "C31"]
[Opening "KGD"]
[Variation "Falkbeer counter-gambit"]

e4 e5 f4 d5 exd5 *

[ECO "C31"]
[Opening "KGD"]
[Variation "Nimzovich counter-gambit"]

e4 e5 f4 d5 exd5 c6 *

[ECO "C31"]
[Opening "KGD"]
[Variation "Falkbeer, 3...e4"]

e4 e5 f4 d5 exd5 e4 *

[ECO "C31"]
[Opening "KGD"]
[Variation "Falkbeer, Rubinstein variation"]

e4 e5 f4 d5 exd5 e4 Nc3 Nf6 Qe2 *

[ECO "C31"]
[Opening "KGD"]
[Variation "Falkbeer, Nimzovich variation"]

e4 e5 f4 d5 exd5 e4 Bb5+ *

[ECO "C31"]
[Opening "KGD"]
[Variation "Falkbeer, 4.d3"]

e4 e5 f4 d5 exd5 e4 d3 *

[ECO "C31"]
[Opening "KGD"]
[Variation "Falkbeer, Morphy gambit"]

e4 e5 f4 d5 exd5 e4 d3 Nf6 Nc3 Bb4 Bd2 e3 *

[ECO "C32"]
[Opening "KGD"]
[Variation "Falkbeer, 5.de"]

e4 e5 f4 d5 exd5 e4 d3 Nf6 dxe4 *

[ECO "C32"]
[Opening "KGD"]
[Variation "Falkbeer, Alapin variation"]

e4 e5 f4 d5 exd5 e4 d3 Nf6 dxe4 Nxe4 Nf3 Bc5 Qe2 Bf2+ Kd1 Qxd5+ Nfd2 *

[ECO "C32"]
[Opening "KGD"]
[Variation "Falkbeer, main line, 7...Bf5"]

e4 e5 f4 d5 exd5 e4 d3 Nf6 dxe4 Nxe4 Nf3 Bc5 Qe2 Bf5 *

[ECO "C32"]
[Opening "KGD"]
[Variation "Falkbeer, Tarrasch variation"]

e4 e5 f4 d5 exd5 e4 d3 Nf6 dxe4 Nxe4 Nf3 Bc5 Qe2 Bf5 g4 O-O *

[ECO "C32"]
[Opening "KGD"]
[Variation "Falkbeer, Charousek gambit"]

e4 e5 f4 d5 exd5 e4 d3 Nf6 dxe4 Nxe4 Qe2 *

[ECO "C32"]
[Opening "KGD"]
[Variation "Falkbeer, Charousek variation"]

e4 e5 f4 d5 exd5 e4 d3 Nf6 dxe4 Nxe4 Qe2 Qxd5 Nd2 f5 g4 *

[ECO "C32"]
[Opening "KGD"]
[Variation "Falkbeer, Keres variation"]

e4 e5 f4 d5 exd5 e4 d3 Nf6 Nd2 *

[ECO "C32"]
[Opening "KGD"]
[Variation "Falkbeer, Reti variation"]

e4 e5 f4 d5 exd5 e4 d3 Nf6 Qe2 *

[ECO "C33"]
[Opening "King's gambit accepted"]

e4 e5 f4 exf4 *

[ECO "C33"]
[Opening "KGA"]
[Variation "Tumbleweed gambit"]

e4 e5 f4 exf4 Kf2 *

[ECO "C33"]
[Opening "KGA"]
[Variation "Orsini gambit"]

e4 e5 f4 exf4 b3 *

[ECO "C33"]
[Opening "KGA"]
[Variation "Pawn's gambit (Stamma gambit)"]

e4 e5 f4 exf4 h4 *

[ECO "C33"]
[Opening "KGA"]
[Variation "Schurig gambit"]

e4 e5 f4 exf4 Bd3 *

[ECO "C33"]
[Opening "KGA"]
[Variation "Carrera (Basman) gambit"]

e4 e5 f4 exf4 Qe2 *

[ECO "C33"]
[Opening "KGA"]
[Variation "Villemson (Steinitz) gambit"]

e4 e5 f4 exf4 d4 *

[ECO "C33"]
[Opening "KGA"]
[Variation "Keres (Mason-Steinitz) gambit"]

e4 e5 f4 exf4 Nc3 *

[ECO "C33"]
[Opening "KGA"]
[Variation "Breyer gambit"]

e4 e5 f4 exf4 Qf3 *

[ECO "C33"]
[Opening "KGA"]
[Variation "Lesser bishop's (Petroff-Jaenisch-Tartakower) gambit"]

e4 e5 f4 exf4 Be2 *

[ECO "C33"]
[Opening "KGA"]
[Variation "bishop's gambit"]

e4 e5 f4 exf4 Bc4 *

[ECO "C33"]
[Opening "KGA"]
[Variation "bishop's gambit, Chigorin's attack"]

e4 e5 f4 exf4 Bc4 Qh4+ Kf1 d5 Bxd5 g5 g3 *

[ECO "C33"]
[Opening "KGA"]
[Variation "bishop's gambit, Greco variation"]

e4 e5 f4 exf4 Bc4 Qh4+ Kf1 Bc5 *

[ECO "C33"]
[Opening "KGA"]
[Variation "bishop's gambit, classical defence"]

e4 e5 f4 exf4 Bc4 Qh4+ Kf1 g5 *

[ECO "C33"]
[Opening "KGA"]
[Variation "bishop's gambit, Grimm attack"]

e4 e5 f4 exf4 Bc4 Qh4+ Kf1 g5 Nc3 Bg7 d4 d6 e5 *

[ECO "C33"]
[Opening "KGA"]
[Variation "bishop's gambit, classical defence"]

e4 e5 f4 exf4 Bc4 Qh4+ Kf1 g5 Nc3 Bg7 d4 Ne7 *

[ECO "C33"]
[Opening "KGA"]
[Variation "bishop's gambit, McDonnell attack"]

e4 e5 f4 exf4 Bc4 Qh4+ Kf1 g5 Nc3 Bg7 d4 Ne7 g3 *

[ECO "C33"]
[Opening "KGA"]
[Variation "bishop's gambit, McDonnell attack"]

e4 e5 f4 exf4 Bc4 Qh4+ Kf1 g5 Nc3 Bg7 g3 *

[ECO "C33"]
[Opening "KGA"]
[Variation "bishop's gambit, Fraser variation"]

e4 e5 f4 exf4 Bc4 Qh4+ Kf1 g5 Nc3 Bg7 g3 fxg3 Qf3 *

[ECO "C33"]
[Opening "KGA"]
[Variation "bishop's gambit, classical defence, Cozio attack"]

e4 e5 f4 exf4 Bc4 Qh4+ Kf1 g5 Qf3 *

[ECO "C33"]
[Opening "KGA"]
[Variation "bishop's gambit, Boden defence"]

e4 e5 f4 exf4 Bc4 Qh4+ Kf1 Nc6 *

[ECO "C33"]
[Opening "KGA"]
[Variation "bishop's gambit, Bryan counter-gambit"]

e4 e5 f4 exf4 Bc4 Qh4+ Kf1 b5 *

[ECO "C33"]
[Opening "KGA"]
[Variation "bishop's gambit, Bryan counter-gambit"]

e4 e5 f4 exf4 Bc4 b5 *

[ECO "C33"]
[Opening "KGA"]
[Variation "bishop's gambit, Steinitz defence"]

e4 e5 f4 exf4 Bc4 Ne7 *

[ECO "C33"]
[Opening "KGA"]
[Variation "bishop's gambit, Maurian defence"]

e4 e5 f4 exf4 Bc4 Nc6 *

[ECO "C33"]
[Opening "KGA"]
[Variation "bishop's gambit, Ruy Lopez defence"]

e4 e5 f4 exf4 Bc4 c6 *

[ECO "C33"]
[Opening "KGA"]
[Variation "bishop's gambit, Lopez-Gianutio counter-gambit"]

e4 e5 f4 exf4 Bc4 f5 *

[ECO "C33"]
[Opening "KGA"]
[Variation "Lopez-Gianutio counter-gambit, Hein variation"]

e4 e5 f4 exf4 Bc4 f5 Qe2 Qh4+ Kd1 fxe4 Nc3 Kd8 *

[ECO "C33"]
[Opening "KGA"]
[Variation "bishop's gambit, Bledow variation"]

e4 e5 f4 exf4 Bc4 d5 *

[ECO "C33"]
[Opening "KGA"]
[Variation "bishop's gambit, Gifford variation"]

e4 e5 f4 exf4 Bc4 d5 Bxd5 Qh4+ Kf1 g5 g3 *

[ECO "C33"]
[Opening "KGA"]
[Variation "bishop's gambit, Boren-Svenonius variation"]

e4 e5 f4 exf4 Bc4 d5 Bxd5 Qh4+ Kf1 Bd6 *

[ECO "C33"]
[Opening "KGA"]
[Variation "bishop's gambit, Anderssen variation"]

e4 e5 f4 exf4 Bc4 d5 Bxd5 c6 *

[ECO "C33"]
[Opening "KGA"]
[Variation "bishop's gambit, Morphy variation"]

e4 e5 f4 exf4 Bc4 d5 Bxd5 Nf6 *

[ECO "C33"]
[Opening "KGA"]
[Variation "bishop's gambit, Cozio (Morphy) defence"]

e4 e5 f4 exf4 Bc4 Nf6 *

[ECO "C33"]
[Opening "KGA"]
[Variation "bishop's gambit, Bogolyubov variation"]

e4 e5 f4 exf4 Bc4 Nf6 Nc3 *

[ECO "C33"]
[Opening "KGA"]
[Variation "bishop's gambit, Paulsen attack"]

e4 e5 f4 exf4 Bc4 Nf6 Nc3 Bb4 e5 *

[ECO "C33"]
[Opening "KGA"]
[Variation "bishop's gambit, Jaenisch variation"]

e4 e5 f4 exf4 Bc4 Nf6 Nc3 c6 *

[ECO "C34"]
[Opening "King's knight's gambit"]

e4 e5 f4 exf4 Nf3 *

[ECO "C34"]
[Opening "KGA"]
[Variation "Bonsch-Osmolovsky variation"]

e4 e5 f4 exf4 Nf3 Ne7 *

[ECO "C34"]
[Opening "KGA"]
[Variation "Gianutio counter-gambit"]

e4 e5 f4 exf4 Nf3 f5 *

[ECO "C34"]
[Opening "KGA"]
[Variation "Fischer defence"]

e4 e5 f4 exf4 Nf3 d6 *

[ECO "C34"]
[Opening "KGA"]
[Variation "Becker defence"]

e4 e5 f4 exf4 Nf3 h6 *

[ECO "C34"]
[Opening "KGA"]
[Variation "Schallop defence"]

e4 e5 f4 exf4 Nf3 Nf6 *

[ECO "C35"]
[Opening "KGA"]
[Variation "Cunningham defence"]

e4 e5 f4 exf4 Nf3 Be7 *

[ECO "C35"]
[Opening "KGA"]
[Variation "Cunningham, Bertin gambit"]

e4 e5 f4 exf4 Nf3 Be7 Bc4 Bh4+ g3 *

[ECO "C35"]
[Opening "KGA"]
[Variation "Cunningham, three pawns gambit"]

e4 e5 f4 exf4 Nf3 Be7 Bc4 Bh4+ g3 fxg3 O-O gxh2+ Kh1 *

[ECO "C35"]
[Opening "KGA"]
[Variation "Cunningham, Euwe defence"]

e4 e5 f4 exf4 Nf3 Be7 Bc4 Nf6 *

[ECO "C36"]
[Opening "KGA"]
[Variation "Abbazia defence (classical defence, modern defence[!])"]

e4 e5 f4 exf4 Nf3 d5 *

[ECO "C36"]
[Opening "KGA"]
[Variation "Abbazia defence, modern variation"]

e4 e5 f4 exf4 Nf3 d5 exd5 Nf6 *

[ECO "C36"]
[Opening "KGA"]
[Variation "Abbazia defence, Botvinnik variation"]

e4 e5 f4 exf4 Nf3 d5 exd5 Nf6 Bb5+ c6 dxc6 bxc6 Bc4 Nd5 *

[ECO "C37"]
[Opening "KGA"]
[Variation "Quaade gambit"]

e4 e5 f4 exf4 Nf3 g5 Nc3 *

[ECO "C37"]
[Opening "KGA"]
[Variation "Rosentreter gambit"]

e4 e5 f4 exf4 Nf3 g5 d4 *

[ECO "C37"]
[Opening "KGA"]
[Variation "Sörensen gambit"]

e4 e5 f4 exf4 Nf3 g5 d4 g4 Ne5 *

[ECO "C37"]
[Opening "KGA"]
[Variation "King's knight's gambit"]

e4 e5 f4 exf4 Nf3 g5 Bc4 *

[ECO "C37"]
[Opening "KGA"]
[Variation "Blachly gambit"]

e4 e5 f4 exf4 Nf3 g5 Bc4 Nc6 *

[ECO "C37"]
[Opening "KGA"]
[Variation "Lolli gambit (wild Muzio gambit)"]

e4 e5 f4 exf4 Nf3 g5 Bc4 g4 Bxf7+ *

[ECO "C37"]
[Opening "KGA"]
[Variation "Lolli gambit, Young variation"]

e4 e5 f4 exf4 Nf3 g5 Bc4 g4 Bxf7+ Kxf7 O-O gxf3 Qxf3 Qf6 d4 Qxd4+ Be3 Qf6 Nc3 *

[ECO "C37"]
[Opening "KGA"]
[Variation "Ghulam Kassim gambit"]

e4 e5 f4 exf4 Nf3 g5 Bc4 g4 d4 *

[ECO "C37"]
[Opening "KGA"]
[Variation "MacDonnell gambit"]

e4 e5 f4 exf4 Nf3 g5 Bc4 g4 Nc3 *

[ECO "C37"]
[Opening "KGA"]
[Variation "Salvio gambit"]

e4 e5 f4 exf4 Nf3 g5 Bc4 g4 Ne5 *

[ECO "C37"]
[Opening "KGA"]
[Variation "Silberschmidt gambit"]

e4 e5 f4 exf4 Nf3 g5 Bc4 g4 Ne5 Qh4+ Kf1 Nh6 d4 f3 *

[ECO "C37"]
[Opening "KGA"]
[Variation "Salvio gambit, Anderssen counter-attack"]

e4 e5 f4 exf4 Nf3 g5 Bc4 g4 Ne5 Qh4+ Kf1 Nh6 d4 d6 *

[ECO "C37"]
[Opening "KGA"]
[Variation "Cochrane gambit"]

e4 e5 f4 exf4 Nf3 g5 Bc4 g4 Ne5 Qh4+ Kf1 f3 *

[ECO "C37"]
[Opening "KGA"]
[Variation "Herzfeld gambit"]

e4 e5 f4 exf4 Nf3 g5 Bc4 g4 Ne5 Qh4+ Kf1 Nc6 *

[ECO "C37"]
[Opening "KGA"]
[Variation "Muzio gambit"]

e4 e5 f4 exf4 Nf3 g5 Bc4 g4 O-O *

[ECO "C37"]
[Opening "KGA"]
[Variation "Muzio gambit, Paulsen variation"]

e4 e5 f4 exf4 Nf3 g5 Bc4 g4 O-O gxf3 Qxf3 Qf6 e5 Qxe5 d3 Bh6 Nc3 Ne7 Bd2 Nbc6 Rae1 *

[ECO "C37"]
[Opening "KGA"]
[Variation "double Muzio gambit"]

e4 e5 f4 exf4 Nf3 g5 Bc4 g4 O-O gxf3 Qxf3 Qf6 e5 Qxe5 Bxf7+ *

[ECO "C37"]
[Opening "KGA"]
[Variation "Muzio gambit, From defence"]

e4 e5 f4 exf4 Nf3 g5 Bc4 g4 O-O gxf3 Qxf3 Qe7 *

[ECO "C37"]
[Opening "KGA"]
[Variation "Muzio gambit, Holloway defence"]

e4 e5 f4 exf4 Nf3 g5 Bc4 g4 O-O gxf3 Qxf3 Nc6 *

[ECO "C37"]
[Opening "KGA"]
[Variation "Muzio gambit, Kling and Horwitz counter-attack"]

e4 e5 f4 exf4 Nf3 g5 Bc4 g4 O-O Qe7 *

[ECO "C37"]
[Opening "KGA"]
[Variation "Muzio gambit, Brentano defence"]

e4 e5 f4 exf4 Nf3 g5 Bc4 g4 O-O d5 *

[ECO "C38"]
[Opening "King's knight's gambit"]

e4 e5 f4 exf4 Nf3 g5 Bc4 Bg7 *

[ECO "C38"]
[Opening "KGA"]
[Variation "Hanstein gambit"]

e4 e5 f4 exf4 Nf3 g5 Bc4 Bg7 O-O *

[ECO "C38"]
[Opening "KGA"]
[Variation "Philidor gambit"]

e4 e5 f4 exf4 Nf3 g5 Bc4 Bg7 h4 *

[ECO "C38"]
[Opening "KGA"]
[Variation "Greco gambit"]

e4 e5 f4 exf4 Nf3 g5 Bc4 Bg7 h4 h6 d4 d6 Nc3 c6 hxg5 hxg5 Rxh8 Bxh8 Ne5 *

[ECO "C38"]
[Opening "KGA"]
[Variation "Philidor gambit, Schultz variation"]

e4 e5 f4 exf4 Nf3 g5 Bc4 Bg7 h4 h6 d4 d6 Qd3 *

[ECO "C39"]
[Opening "King's knight's gambit"]

e4 e5 f4 exf4 Nf3 g5 h4 *

[ECO "C39"]
[Opening "KGA"]
[Variation "Allgaier gambit"]

e4 e5 f4 exf4 Nf3 g5 h4 g4 Ng5 *

[ECO "C39"]
[Opening "KGA"]
[Variation "Allgaier, Horny defence"]

e4 e5 f4 exf4 Nf3 g5 h4 g4 Ng5 h6 Nxf7 Kxf7 Qxg4 Nf6 Qxf4 Bd6 *

[ECO "C39"]
[Opening "KGA"]
[Variation "Allgaier, Thorold variation"]

e4 e5 f4 exf4 Nf3 g5 h4 g4 Ng5 h6 Nxf7 Kxf7 d4 *

[ECO "C39"]
[Opening "KGA"]
[Variation "Allgaier, Cook variation"]

e4 e5 f4 exf4 Nf3 g5 h4 g4 Ng5 h6 Nxf7 Kxf7 d4 d5 Bxf4 dxe4 Bc4+ Kg7 Be5+ *

[ECO "C39"]
[Opening "KGA"]
[Variation "Allgaier, Blackburne gambit"]

e4 e5 f4 exf4 Nf3 g5 h4 g4 Ng5 h6 Nxf7 Kxf7 Nc3 *

[ECO "C39"]
[Opening "KGA"]
[Variation "Allgaier, Walker attack"]

e4 e5 f4 exf4 Nf3 g5 h4 g4 Ng5 h6 Nxf7 Kxf7 Bc4+ *

[ECO "C39"]
[Opening "KGA"]
[Variation "Allgaier, Urusov attack"]

e4 e5 f4 exf4 Nf3 g5 h4 g4 Ng5 h6 Nxf7 Kxf7 Bc4+ d5 Bxd5+ Kg7 d4 *

[ECO "C39"]
[Opening "KGA"]
[Variation "Allgaier, Schlechter defence"]

e4 e5 f4 exf4 Nf3 g5 h4 g4 Ng5 Nf6 *

[ECO "C39"]
[Opening "KGA"]
[Variation "Kieseritsky, Paulsen defence"]

e4 e5 f4 exf4 Nf3 g5 h4 g4 Ne5 Bg7 *

[ECO "C39"]
[Opening "KGA"]
[Variation "Kieseritsky, long whip (Stockwhip, classical) defence"]

e4 e5 f4 exf4 Nf3 g5 h4 g4 Ne5 h5 *

[ECO "C39"]
[Opening "KGA"]
[Variation "Kieseritsky, long whip defence, Jaenisch variation"]

e4 e5 f4 exf4 Nf3 g5 h4 g4 Ne5 h5 Bc4 Rh7 d4 Bh6 Nc3 *

[ECO "C39"]
[Opening "KGA"]
[Variation "Kieseritsky, Brentano (Campbell) defence"]

e4 e5 f4 exf4 Nf3 g5 h4 g4 Ne5 d5 *

[ECO "C39"]
[Opening "KGA"]
[Variation "Kieseritsky, Brentano defence, Kaplanek variation"]

e4 e5 f4 exf4 Nf3 g5 h4 g4 Ne5 d5 d4 Nf6 exd5 Qxd5 Nc3 Bb4 Kf2 *

[ECO "C39"]
[Opening "KGA"]
[Variation "Kieseritsky, Brentano defence"]

e4 e5 f4 exf4 Nf3 g5 h4 g4 Ne5 d5 d4 Nf6 Bxf4 *

[ECO "C39"]
[Opening "KGA"]
[Variation "Kieseritsky, Brentano defence, Caro variation"]

e4 e5 f4 exf4 Nf3 g5 h4 g4 Ne5 d5 d4 Nf6 Bxf4 Nxe4 Nd2 *

[ECO "C39"]
[Opening "KGA"]
[Variation "Kieseritsky, Salvio (Rosenthal) defence"]

e4 e5 f4 exf4 Nf3 g5 h4 g4 Ne5 Qe7 *

[ECO "C39"]
[Opening "KGA"]
[Variation "Kieseritsky, Salvio defence, Cozio variation"]

e4 e5 f4 exf4 Nf3 g5 h4 g4 Ne5 Qe7 d4 f5 Bc4 *

[ECO "C39"]
[Opening "KGA"]
[Variation "Kieseritsky, Polerio defence"]

e4 e5 f4 exf4 Nf3 g5 h4 g4 Ne5 Be7 *

[ECO "C39"]
[Opening "KGA"]
[Variation "Kieseritsky, Neumann defence"]

e4 e5 f4 exf4 Nf3 g5 h4 g4 Ne5 Nc6 *

[ECO "C39"]
[Opening "KGA"]
[Variation "Kieseritsky, Kolisch defence"]

e4 e5 f4 exf4 Nf3 g5 h4 g4 Ne5 d6 *

[ECO "C39"]
[Opening "KGA"]
[Variation "Kieseritsky, Berlin defence"]

e4 e5 f4 exf4 Nf3 g5 h4 g4 Ne5 Nf6 *

[ECO "C39"]
[Opening "KGA"]
[Variation "Kieseritsky, Berlin defence, Riviere variation"]

e4 e5 f4 exf4 Nf3 g5 h4 g4 Ne5 Nf6 Nxg4 d5 *

[ECO "C39"]
[Opening "KGA"]
[Variation "Kieseritsky, Berlin defence, 6.Bc4"]

e4 e5 f4 exf4 Nf3 g5 h4 g4 Ne5 Nf6 Bc4 *

[ECO "C39"]
[Opening "KGA"]
[Variation "Kieseritsky, Rice gambit"]

e4 e5 f4 exf4 Nf3 g5 h4 g4 Ne5 Nf6 Bc4 d5 exd5 Bd6 O-O *

[ECO "C40"]
[Opening "King's knight opening"]

e4 e5 Nf3 *

[ECO "C40"]
[Opening "Gunderam defence"]

e4 e5 Nf3 Qe7 *

[ECO "C40"]
[Opening "Greco defence"]

e4 e5 Nf3 Qf6 *

[ECO "C40"]
[Opening "Damiano's defence"]

e4 e5 Nf3 f6 *

[ECO "C40"]
[Opening "QP counter-gambit (elephant gambit)"]

e4 e5 Nf3 d5 *

[ECO "C40"]
[Opening "QP counter-gambit"]
[Variation "Maroczy gambit"]

e4 e5 Nf3 d5 exd5 Bd6 *

[ECO "C40"]
[Opening "Latvian counter-gambit"]

e4 e5 Nf3 f5 *

[ECO "C40"]
[Opening "Latvian"]
[Variation "Nimzovich variation"]

e4 e5 Nf3 f5 Nxe5 Qf6 d4 d6 Nc4 fxe4 Ne3 *

[ECO "C40"]
[Opening "Latvian"]
[Variation "Fraser defence"]

e4 e5 Nf3 f5 Nxe5 Nc6 *

[ECO "C40"]
[Opening "Latvian gambit, 3.Bc4"]

e4 e5 Nf3 f5 Bc4 *

[ECO "C40"]
[Opening "Latvian"]
[Variation "Behting variation"]

e4 e5 Nf3 f5 Bc4 fxe4 Nxe5 Qg5 Nf7 Qxg2 Rf1 d5 Nxh8 Nf6 *

[ECO "C40"]
[Opening "Latvian"]
[Variation "Polerio variation"]

e4 e5 Nf3 f5 Bc4 fxe4 Nxe5 d5 *

[ECO "C40"]
[Opening "Latvian"]
[Variation "corkscrew counter-gambit"]

e4 e5 Nf3 f5 Bc4 fxe4 Nxe5 Nf6 *

[ECO "C41"]
[Opening "Philidor's defence"]

e4 e5 Nf3 d6 *

[ECO "C41"]
[Opening "Philidor"]
[Variation "Steinitz variation"]

e4 e5 Nf3 d6 Bc4 Be7 c3 *

[ECO "C41"]
[Opening "Philidor"]
[Variation "Lopez counter-gambit"]

e4 e5 Nf3 d6 Bc4 f5 *

[ECO "C41"]
[Opening "Philidor"]
[Variation "Lopez counter-gambit, Jaenisch variation"]

e4 e5 Nf3 d6 Bc4 f5 d4 exd4 Ng5 Nh6 Nxh7 *

[ECO "C41"]
[Opening "Philidor's defence"]

e4 e5 Nf3 d6 d4 *

[ECO "C41"]
[Opening "Philidor"]
[Variation "Philidor counter-gambit"]

e4 e5 Nf3 d6 d4 f5 *

[ECO "C41"]
[Opening "Philidor"]
[Variation "Philidor counter-gambit, del Rio attack"]

e4 e5 Nf3 d6 d4 f5 dxe5 fxe4 Ng5 d5 e6 *

[ECO "C41"]
[Opening "Philidor"]
[Variation "Philidor counter-gambit, Berger variation"]

e4 e5 Nf3 d6 d4 f5 dxe5 fxe4 Ng5 d5 e6 Bc5 Nc3 *

[ECO "C41"]
[Opening "Philidor"]
[Variation "Philidor counter-gambit, Zukertort variation"]

e4 e5 Nf3 d6 d4 f5 Nc3 *

[ECO "C41"]
[Opening "Philidor"]
[Variation "exchange variation"]

e4 e5 Nf3 d6 d4 exd4 *

[ECO "C41"]
[Opening "Philidor"]
[Variation "Boden variation"]

e4 e5 Nf3 d6 d4 exd4 Qxd4 Bd7 *

[ECO "C41"]
[Opening "Philidor"]
[Variation "exchange variation"]

e4 e5 Nf3 d6 d4 exd4 Nxd4 *

[ECO "C41"]
[Opening "Philidor"]
[Variation "Paulsen attack"]

e4 e5 Nf3 d6 d4 exd4 Nxd4 d5 exd5 *

[ECO "C41"]
[Opening "Philidor"]
[Variation "exchange variation"]

e4 e5 Nf3 d6 d4 exd4 Nxd4 Nf6 *

[ECO "C41"]
[Opening "Philidor"]
[Variation "Berger variation"]

e4 e5 Nf3 d6 d4 exd4 Nxd4 Nf6 Nc3 Be7 Be2 O-O O-O c5 Nf3 Nc6 Bg5 Be6 Re1 *

[ECO "C41"]
[Opening "Philidor"]
[Variation "Larsen variation"]

e4 e5 Nf3 d6 d4 exd4 Nxd4 g6 *

[ECO "C41"]
[Opening "Philidor"]
[Variation "Nimzovich (Jaenisch) variation"]

e4 e5 Nf3 d6 d4 Nf6 *

[ECO "C41"]
[Opening "Philidor"]
[Variation "Improved Hanham variation"]

e4 e5 Nf3 d6 d4 Nf6 Nc3 Nbd7 *

[ECO "C41"]
[Opening "Philidor"]
[Variation "Nimzovich, Sozin variation"]

e4 e5 Nf3 d6 d4 Nf6 Nc3 Nbd7 Bc4 Be7 O-O O-O Qe2 c6 a4 exd4 *

[ECO "C41"]
[Opening "Philidor"]
[Variation "Nimzovich, Larobok variation"]

e4 e5 Nf3 d6 d4 Nf6 Nc3 Nbd7 Bc4 Be7 Ng5 O-O Bxf7+ *

[ECO "C41"]
[Opening "Philidor"]
[Variation "Nimzovich variation"]

e4 e5 Nf3 d6 d4 Nf6 dxe5 *

[ECO "C41"]
[Opening "Philidor"]
[Variation "Nimzovich, Sokolsky variation"]

e4 e5 Nf3 d6 d4 Nf6 dxe5 Nxe4 Nbd2 *

[ECO "C41"]
[Opening "Philidor"]
[Variation "Nimzovich, Rellstab variation"]

e4 e5 Nf3 d6 d4 Nf6 dxe5 Nxe4 Qd5 *

[ECO "C41"]
[Opening "Philidor"]
[Variation "Nimzovich, Locock variation"]

e4 e5 Nf3 d6 d4 Nf6 Ng5 *

[ECO "C41"]
[Opening "Philidor"]
[Variation "Nimzovich, Klein variation"]

e4 e5 Nf3 d6 d4 Nf6 Bc4 *

[ECO "C41"]
[Opening "Philidor"]
[Variation "Hanham variation"]

e4 e5 Nf3 d6 d4 Nd7 *

[ECO "C41"]
[Opening "Philidor"]
[Variation "Hanham, Krause variation"]

e4 e5 Nf3 d6 d4 Nd7 Bc4 c6 O-O *

[ECO "C41"]
[Opening "Philidor"]
[Variation "Hanham, Steiner variation"]

e4 e5 Nf3 d6 d4 Nd7 Bc4 c6 O-O Be7 dxe5 *

[ECO "C41"]
[Opening "Philidor"]
[Variation "Hanham, Kmoch variation"]

e4 e5 Nf3 d6 d4 Nd7 Bc4 c6 Ng5 *

[ECO "C41"]
[Opening "Philidor"]
[Variation "Hanham, Berger variation"]

e4 e5 Nf3 d6 d4 Nd7 Bc4 c6 Ng5 Nh6 f4 Be7 O-O O-O c3 d5 *

[ECO "C41"]
[Opening "Philidor"]
[Variation "Hanham, Schlechter variation"]

e4 e5 Nf3 d6 d4 Nd7 Bc4 c6 Nc3 *

[ECO "C41"]
[Opening "Philidor"]
[Variation "Hanham, Delmar variation"]

e4 e5 Nf3 d6 d4 Nd7 Bc4 c6 c3 *

[ECO "C42"]
[Opening "Petrov's defence"]

e4 e5 Nf3 Nf6 *

[ECO "C42"]
[Opening "Petrov"]
[Variation "French attack"]

e4 e5 Nf3 Nf6 Nxe5 d6 Nf3 Nxe4 d3 *

[ECO "C42"]
[Opening "Petrov"]
[Variation "Kaufmann attack"]

e4 e5 Nf3 Nf6 Nxe5 d6 Nf3 Nxe4 c4 *

[ECO "C42"]
[Opening "Petrov"]
[Variation "Nimzovich attack"]

e4 e5 Nf3 Nf6 Nxe5 d6 Nf3 Nxe4 Nc3 *

[ECO "C42"]
[Opening "Petrov"]
[Variation "Cozio (Lasker) attack"]

e4 e5 Nf3 Nf6 Nxe5 d6 Nf3 Nxe4 Qe2 *

[ECO "C42"]
[Opening "Petrov"]
[Variation "classical attack"]

e4 e5 Nf3 Nf6 Nxe5 d6 Nf3 Nxe4 d4 *

[ECO "C42"]
[Opening "Petrov"]
[Variation "classical attack, Chigorin variation"]

e4 e5 Nf3 Nf6 Nxe5 d6 Nf3 Nxe4 d4 d5 Bd3 Be7 O-O Nc6 Re1 *

[ECO "C42"]
[Opening "Petrov"]
[Variation "classical attack, Berger variation"]

e4 e5 Nf3 Nf6 Nxe5 d6 Nf3 Nxe4 d4 d5 Bd3 Be7 O-O Nc6 Re1 Bg4 c3 f5 Nbd2 *

[ECO "C42"]
[Opening "Petrov"]
[Variation "classical attack, Krause variation"]

e4 e5 Nf3 Nf6 Nxe5 d6 Nf3 Nxe4 d4 d5 Bd3 Be7 O-O Nc6 Re1 Bg4 c3 f5 c4 *

[ECO "C42"]
[Opening "Petrov"]
[Variation "classical attack, Maroczy variation"]

e4 e5 Nf3 Nf6 Nxe5 d6 Nf3 Nxe4 d4 d5 Bd3 Be7 O-O Nc6 Re1 Bg4 c3 f5 c4 Bh4 *

[ECO "C42"]
[Opening "Petrov"]
[Variation "classical attack, Jaenisch variation"]

e4 e5 Nf3 Nf6 Nxe5 d6 Nf3 Nxe4 d4 d5 Bd3 Be7 O-O Nc6 c4 *

[ECO "C42"]
[Opening "Petrov"]
[Variation "classical attack, Mason variation"]

e4 e5 Nf3 Nf6 Nxe5 d6 Nf3 Nxe4 d4 d5 Bd3 Be7 O-O O-O *

[ECO "C42"]
[Opening "Petrov"]
[Variation "classical attack, Marshall variation"]

e4 e5 Nf3 Nf6 Nxe5 d6 Nf3 Nxe4 d4 d5 Bd3 Bd6 *

[ECO "C42"]
[Opening "Petrov"]
[Variation "classical attack, Tarrasch variation"]

e4 e5 Nf3 Nf6 Nxe5 d6 Nf3 Nxe4 d4 d5 Bd3 Bd6 O-O O-O c4 Bg4 *

[ECO "C42"]
[Opening "Petrov"]
[Variation "classical attack, Marshall trap"]

e4 e5 Nf3 Nf6 Nxe5 d6 Nf3 Nxe4 d4 d5 Bd3 Bd6 O-O O-O c4 Bg4 cxd5 f5 Re1 Bxh2+ *

[ECO "C42"]
[Opening "Petrov"]
[Variation "classical attack, close variation"]

e4 e5 Nf3 Nf6 Nxe5 d6 Nf3 Nxe4 d4 Nf6 *

[ECO "C42"]
[Opening "Petrov"]
[Variation "Cochrane gambit"]

e4 e5 Nf3 Nf6 Nxe5 d6 Nxf7 *

[ECO "C42"]
[Opening "Petrov"]
[Variation "Paulsen attack"]

e4 e5 Nf3 Nf6 Nxe5 d6 Nc4 *

[ECO "C42"]
[Opening "Petrov"]
[Variation "Damiano variation"]

e4 e5 Nf3 Nf6 Nxe5 Nxe4 *

[ECO "C42"]
[Opening "Petrov three knights game"]

e4 e5 Nf3 Nf6 Nc3 *

[ECO "C42"]
[Opening "Petrov"]
[Variation "Italian variation"]

e4 e5 Nf3 Nf6 Bc4 *

[ECO "C43"]
[Opening "Petrov"]
[Variation "modern (Steinitz) attack"]

e4 e5 Nf3 Nf6 d4 *

[ECO "C43"]
[Opening "Petrov"]
[Variation "modern attack, main line"]

e4 e5 Nf3 Nf6 d4 exd4 e5 Ne4 Qxd4 *

[ECO "C43"]
[Opening "Petrov"]
[Variation "modern attack, Steinitz variation"]

e4 e5 Nf3 Nf6 d4 exd4 e5 Ne4 Qe2 *

[ECO "C43"]
[Opening "Petrov"]
[Variation "modern attack, Bardeleben variation"]

e4 e5 Nf3 Nf6 d4 exd4 e5 Ne4 Qe2 Nc5 Nxd4 Nc6 *

[ECO "C43"]
[Opening "Petrov"]
[Variation "Urusov gambit"]

e4 e5 Nf3 Nf6 d4 exd4 Bc4 *

[ECO "C43"]
[Opening "Petrov"]
[Variation "modern attack, Symmetrical variation"]

e4 e5 Nf3 Nf6 d4 Nxe4 *

[ECO "C43"]
[Opening "Petrov"]
[Variation "modern attack, Trifunovic variation"]

e4 e5 Nf3 Nf6 d4 Nxe4 Bd3 d5 Nxe5 Bd6 O-O O-O c4 Bxe5 *

[ECO "C44"]
[Opening "King's pawn game"]

e4 e5 Nf3 Nc6 *

[ECO "C44"]
[Opening "Irish (Chicago) gambit"]

e4 e5 Nf3 Nc6 Nxe5 Nxe5 d4 *

[ECO "C44"]
[Opening "Konstantinopolsky opening"]

e4 e5 Nf3 Nc6 g3 *

[ECO "C44"]
[Opening "Dresden opening"]

e4 e5 Nf3 Nc6 c4 *

[ECO "C44"]
[Opening "Inverted Hungarian"]

e4 e5 Nf3 Nc6 Be2 *

[ECO "C44"]
[Opening "Inverted Hanham"]

e4 e5 Nf3 Nc6 Be2 Nf6 d3 d5 Nbd2 *

[ECO "C44"]
[Opening "Tayler opening"]

e4 e5 Nf3 Nc6 Be2 Nf6 d4 *

[ECO "C44"]
[Opening "Ponziani opening"]

e4 e5 Nf3 Nc6 c3 *

[ECO "C44"]
[Opening "Ponziani"]
[Variation "Caro variation"]

e4 e5 Nf3 Nc6 c3 d5 Qa4 Bd7 *

[ECO "C44"]
[Opening "Ponziani"]
[Variation "Leonhardt variation"]

e4 e5 Nf3 Nc6 c3 d5 Qa4 Nf6 *

[ECO "C44"]
[Opening "Ponziani"]
[Variation "Steinitz variation"]

e4 e5 Nf3 Nc6 c3 d5 Qa4 f6 *

[ECO "C44"]
[Opening "Ponziani"]
[Variation "Jaenisch counter-attack"]

e4 e5 Nf3 Nc6 c3 Nf6 *

[ECO "C44"]
[Opening "Ponziani"]
[Variation "Fraser defence"]

e4 e5 Nf3 Nc6 c3 Nf6 d4 Nxe4 d5 Bc5 *

[ECO "C44"]
[Opening "Ponziani"]
[Variation "Reti variation"]

e4 e5 Nf3 Nc6 c3 Nge7 *

[ECO "C44"]
[Opening "Ponziani"]
[Variation "Romanishin variation"]

e4 e5 Nf3 Nc6 c3 Be7 *

[ECO "C44"]
[Opening "Ponziani counter-gambit"]

e4 e5 Nf3 Nc6 c3 f5 *

[ECO "C44"]
[Opening "Ponziani counter-gambit, Schmidt attack"]

e4 e5 Nf3 Nc6 c3 f5 d4 d6 d5 *

[ECO "C44"]
[Opening "Ponziani counter-gambit, Cordel variation"]

e4 e5 Nf3 Nc6 c3 f5 d4 d6 d5 fxe4 Ng5 Nb8 Nxe4 Nf6 Bd3 Be7 *

[ECO "C44"]
[Opening "Scotch opening"]

e4 e5 Nf3 Nc6 d4 *

[ECO "C44"]
[Opening "Scotch"]
[Variation "Lolli variation"]

e4 e5 Nf3 Nc6 d4 Nxd4 *

[ECO "C44"]
[Opening "Scotch"]
[Variation "Cochrane variation"]

e4 e5 Nf3 Nc6 d4 Nxd4 Nxe5 Ne6 Bc4 c6 O-O Nf6 Nxf7 *

[ECO "C44"]
[Opening "Scotch"]
[Variation "Relfsson gambit ('MacLopez')"]

e4 e5 Nf3 Nc6 d4 exd4 Bb5 *

[ECO "C44"]
[Opening "Scotch"]
[Variation "Göring gambit"]

e4 e5 Nf3 Nc6 d4 exd4 c3 *

[ECO "C44"]
[Opening "Scotch"]
[Variation "Sea-cadet mate"]

e4 e5 Nf3 Nc6 d4 exd4 c3 dxc3 Nxc3 d6 Bc4 Bg4 O-O Ne5 Nxe5 Bxd1 Bxf7+ Ke7 Nd5# *

[ECO "C44"]
[Opening "Scotch"]
[Variation "Göring gambit"]

e4 e5 Nf3 Nc6 d4 exd4 c3 dxc3 Nxc3 Bb4 *

[ECO "C44"]
[Opening "Scotch"]
[Variation "Göring gambit, Bardeleben variation"]

e4 e5 Nf3 Nc6 d4 exd4 c3 dxc3 Nxc3 Bb4 Bc4 Nf6 *

[ECO "C44"]
[Opening "Scotch gambit"]

e4 e5 Nf3 Nc6 d4 exd4 Bc4 *

[ECO "C44"]
[Opening "Scotch gambit"]
[Variation "Anderssen (Paulsen, Suhle) counter-attack"]

e4 e5 Nf3 Nc6 d4 exd4 Bc4 Bc5 O-O d6 c3 Bg4 *

[ECO "C44"]
[Opening "Scotch gambit"]

e4 e5 Nf3 Nc6 d4 exd4 Bc4 Bc5 Ng5 *

[ECO "C44"]
[Opening "Scotch gambit"]
[Variation "Cochrane-Shumov defence"]

e4 e5 Nf3 Nc6 d4 exd4 Bc4 Bc5 Ng5 Nh6 Nxf7 Nxf7 Bxf7+ Kxf7 Qh5+ g6 Qxc5 d5 *

[ECO "C44"]
[Opening "Scotch gambit"]
[Variation "Vitzhum attack"]

e4 e5 Nf3 Nc6 d4 exd4 Bc4 Bc5 Ng5 Nh6 Qh5 *

[ECO "C44"]
[Opening "Scotch gambit"]

e4 e5 Nf3 Nc6 d4 exd4 Bc4 Bb4+ *

[ECO "C44"]
[Opening "Scotch gambit"]
[Variation "Hanneken variation"]

e4 e5 Nf3 Nc6 d4 exd4 Bc4 Bb4+ c3 dxc3 O-O cxb2 Bxb2 Nf6 Ng5 O-O e5 Nxe5 *

[ECO "C44"]
[Opening "Scotch gambit"]

e4 e5 Nf3 Nc6 d4 exd4 Bc4 Bb4+ c3 dxc3 bxc3 *

[ECO "C44"]
[Opening "Scotch gambit"]
[Variation "Cochrane variation"]

e4 e5 Nf3 Nc6 d4 exd4 Bc4 Bb4+ c3 dxc3 bxc3 Ba5 e5 *

[ECO "C44"]
[Opening "Scotch gambit"]
[Variation "Benima defence"]

e4 e5 Nf3 Nc6 d4 exd4 Bc4 Be7 *

[ECO "C44"]
[Opening "Scotch gambit"]
[Variation "Dubois-Reti defence"]

e4 e5 Nf3 Nc6 d4 exd4 Bc4 Nf6 *

[ECO "C45"]
[Opening "Scotch game"]

e4 e5 Nf3 Nc6 d4 exd4 Nxd4 *

[ECO "C45"]
[Opening "Scotch"]
[Variation "Ghulam Kassim variation"]

e4 e5 Nf3 Nc6 d4 exd4 Nxd4 Nxd4 Qxd4 d6 Bd3 *

[ECO "C45"]
[Opening "Scotch"]
[Variation "Pulling counter-attack"]

e4 e5 Nf3 Nc6 d4 exd4 Nxd4 Qh4 *

[ECO "C45"]
[Opening "Scotch"]
[Variation "Horwitz attack"]

e4 e5 Nf3 Nc6 d4 exd4 Nxd4 Qh4 Nb5 *

[ECO "C45"]
[Opening "Scotch"]
[Variation "Berger variation"]

e4 e5 Nf3 Nc6 d4 exd4 Nxd4 Qh4 Nb5 Bb4+ Nd2 Qxe4+ Be2 Qxg2 Bf3 Qh3 Nxc7+ Kd8 Nxa8 Nf6 a3 *

[ECO "C45"]
[Opening "Scotch game"]

e4 e5 Nf3 Nc6 d4 exd4 Nxd4 Qh4 Nb5 Bb4+ Bd2 *

[ECO "C45"]
[Opening "Scotch"]
[Variation "Rosenthal variation"]

e4 e5 Nf3 Nc6 d4 exd4 Nxd4 Qh4 Nb5 Bb4+ Bd2 Qxe4+ Be2 Kd8 O-O Bxd2 Nxd2 Qg6 *

[ECO "C45"]
[Opening "Scotch"]
[Variation "Fraser attack"]

e4 e5 Nf3 Nc6 d4 exd4 Nxd4 Qh4 Nf3 *

[ECO "C45"]
[Opening "Scotch"]
[Variation "Steinitz variation"]

e4 e5 Nf3 Nc6 d4 exd4 Nxd4 Qh4 Nc3 *

[ECO "C45"]
[Opening "Scotch"]
[Variation "Schmidt variation"]

e4 e5 Nf3 Nc6 d4 exd4 Nxd4 Nf6 *

[ECO "C45"]
[Opening "Scotch"]
[Variation "Mieses variation"]

e4 e5 Nf3 Nc6 d4 exd4 Nxd4 Nf6 Nxc6 bxc6 e5 *

[ECO "C45"]
[Opening "Scotch"]
[Variation "Tartakower variation"]

e4 e5 Nf3 Nc6 d4 exd4 Nxd4 Nf6 Nxc6 bxc6 Nd2 *

[ECO "C45"]
[Opening "Scotch game"]

e4 e5 Nf3 Nc6 d4 exd4 Nxd4 Bc5 *

[ECO "C45"]
[Opening "Scotch"]
[Variation "Blackburne attack"]

e4 e5 Nf3 Nc6 d4 exd4 Nxd4 Bc5 Be3 Qf6 c3 Nge7 Qd2 *

[ECO "C45"]
[Opening "Scotch"]
[Variation "Gottschall variation"]

e4 e5 Nf3 Nc6 d4 exd4 Nxd4 Bc5 Be3 Qf6 c3 Nge7 Qd2 d5 Nb5 Bxe3 Qxe3 O-O Nxc7 Rb8 Nxd5 Nxd5 exd5 Nb4 *

[ECO "C45"]
[Opening "Scotch"]
[Variation "Paulsen attack"]

e4 e5 Nf3 Nc6 d4 exd4 Nxd4 Bc5 Be3 Qf6 c3 Nge7 Bb5 *

[ECO "C45"]
[Opening "Scotch"]
[Variation "Paulsen, Gunsberg defence"]

e4 e5 Nf3 Nc6 d4 exd4 Nxd4 Bc5 Be3 Qf6 c3 Nge7 Bb5 Nd8 *

[ECO "C45"]
[Opening "Scotch"]
[Variation "Meitner variation"]

e4 e5 Nf3 Nc6 d4 exd4 Nxd4 Bc5 Be3 Qf6 c3 Nge7 Nc2 *

[ECO "C45"]
[Opening "Scotch"]
[Variation "Blumenfeld attack"]

e4 e5 Nf3 Nc6 d4 exd4 Nxd4 Bc5 Be3 Qf6 Nb5 *

[ECO "C45"]
[Opening "Scotch"]
[Variation "Potter variation"]

e4 e5 Nf3 Nc6 d4 exd4 Nxd4 Bc5 Nb3 *

[ECO "C45"]
[Opening "Scotch"]
[Variation "Romanishin variation"]

e4 e5 Nf3 Nc6 d4 exd4 Nxd4 Bc5 Nb3 Bb4+ *

[ECO "C46"]
[Opening "Three knights game"]

e4 e5 Nf3 Nc6 Nc3 *

[ECO "C46"]
[Opening "Three knights"]
[Variation "Schlechter variation"]

e4 e5 Nf3 Nc6 Nc3 Bb4 Nd5 Nf6 *

[ECO "C46"]
[Opening "Three knights"]
[Variation "Winawer defence (Gothic defence)"]

e4 e5 Nf3 Nc6 Nc3 f5 *

[ECO "C46"]
[Opening "Three knights"]
[Variation "Steinitz variation"]

e4 e5 Nf3 Nc6 Nc3 g6 *

[ECO "C46"]
[Opening "Three knights"]
[Variation "Steinitz, Rosenthal variation"]

e4 e5 Nf3 Nc6 Nc3 g6 d4 exd4 Nd5 *

[ECO "C46"]
[Opening "Four knights game"]

e4 e5 Nf3 Nc6 Nc3 Nf6 *

[ECO "C46"]
[Opening "Four knights"]
[Variation "Schultze-Müller gambit"]

e4 e5 Nf3 Nc6 Nc3 Nf6 Nxe5 *

[ECO "C46"]
[Opening "Four knights"]
[Variation "Italian variation"]

e4 e5 Nf3 Nc6 Nc3 Nf6 Bc4 *

[ECO "C46"]
[Opening "Four knights"]
[Variation "Gunsberg variation"]

e4 e5 Nf3 Nc6 Nc3 Nf6 a3 *

[ECO "C47"]
[Opening "Four knights"]
[Variation "Scotch variation"]

e4 e5 Nf3 Nc6 Nc3 Nf6 d4 *

[ECO "C47"]
[Opening "Four knights"]
[Variation "Scotch, Krause variation"]

e4 e5 Nf3 Nc6 Nc3 Nf6 d4 Bb4 Nxe5 *

[ECO "C47"]
[Opening "Four knights"]
[Variation "Scotch, 4...exd4"]

e4 e5 Nf3 Nc6 Nc3 Nf6 d4 exd4 *

[ECO "C47"]
[Opening "Four knights"]
[Variation "Belgrade gambit"]

e4 e5 Nf3 Nc6 Nc3 Nf6 d4 exd4 Nd5 *

[ECO "C48"]
[Opening "Four knights"]
[Variation "Spanish variation"]

e4 e5 Nf3 Nc6 Nc3 Nf6 Bb5 *

[ECO "C48"]
[Opening "Four knights"]
[Variation "Ranken variation"]

e4 e5 Nf3 Nc6 Nc3 Nf6 Bb5 a6 Bxc6 *

[ECO "C48"]
[Opening "Four knights"]
[Variation "Spielmann variation"]

e4 e5 Nf3 Nc6 Nc3 Nf6 Bb5 a6 Bxc6 dxc6 Nxe5 Nxe4 Nxe4 Qd4 O-O Qxe5 Re1 Be6 d4 Qd5 *

[ECO "C48"]
[Opening "Four knights"]
[Variation "Spanish, classical defence"]

e4 e5 Nf3 Nc6 Nc3 Nf6 Bb5 Bc5 *

[ECO "C48"]
[Opening "Four knights"]
[Variation "Bardeleben variation"]

e4 e5 Nf3 Nc6 Nc3 Nf6 Bb5 Bc5 O-O O-O Nxe5 Nxe5 d4 Bd6 f4 Nc6 e5 Bb4 *

[ECO "C48"]
[Opening "Four knights"]
[Variation "Marshall variation"]

e4 e5 Nf3 Nc6 Nc3 Nf6 Bb5 Bc5 O-O O-O Nxe5 Nd4 *

[ECO "C48"]
[Opening "Four knights"]
[Variation "Rubinstein counter-gambit"]

e4 e5 Nf3 Nc6 Nc3 Nf6 Bb5 Nd4 *

[ECO "C48"]
[Opening "Four knights"]
[Variation "Rubinstein counter-gambit, Bogolyubov variation"]

e4 e5 Nf3 Nc6 Nc3 Nf6 Bb5 Nd4 Nxe5 Qe7 f4 *

[ECO "C48"]
[Opening "Four knights"]
[Variation "Rubinstein counter-gambit, 5.Be2"]

e4 e5 Nf3 Nc6 Nc3 Nf6 Bb5 Nd4 Be2 *

[ECO "C48"]
[Opening "Four knights"]
[Variation "Rubinstein counter-gambit Maroczy variation"]

e4 e5 Nf3 Nc6 Nc3 Nf6 Bb5 Nd4 Be2 Nxf3+ Bxf3 Bc5 O-O O-O d3 d6 Na4 Bb6 *

[ECO "C48"]
[Opening "Four knights"]
[Variation "Rubinstein counter-gambit, exchange variation"]

e4 e5 Nf3 Nc6 Nc3 Nf6 Bb5 Nd4 Nxd4 *

[ECO "C48"]
[Opening "Four knights"]
[Variation "Rubinstein counter-gambit, Henneberger variation"]

e4 e5 Nf3 Nc6 Nc3 Nf6 Bb5 Nd4 O-O *

[ECO "C49"]
[Opening "Four knights"]
[Variation "double Ruy Lopez"]

e4 e5 Nf3 Nc6 Nc3 Nf6 Bb5 Bb4 *

[ECO "C49"]
[Opening "Four knights"]
[Variation "Gunsberg counter-attack"]

e4 e5 Nf3 Nc6 Nc3 Nf6 Bb5 Bb4 O-O O-O Nd5 Nxd5 exd5 e4 *

[ECO "C49"]
[Opening "Four knights"]
[Variation "double Ruy Lopez"]

e4 e5 Nf3 Nc6 Nc3 Nf6 Bb5 Bb4 O-O O-O d3 *

[ECO "C49"]
[Opening "Four knights"]
[Variation "Alatortsev variation"]

e4 e5 Nf3 Nc6 Nc3 Nf6 Bb5 Bb4 O-O O-O d3 Qe7 Ne2 d5 *

[ECO "C49"]
[Opening "Four knights"]

e4 e5 Nf3 Nc6 Nc3 Nf6 Bb5 Bb4 O-O O-O d3 Bxc3 *

[ECO "C49"]
[Opening "Four knights"]
[Variation "Janowski variation"]

e4 e5 Nf3 Nc6 Nc3 Nf6 Bb5 Bb4 O-O O-O d3 Bxc3 bxc3 d6 Re1 *

[ECO "C49"]
[Opening "Four knights"]
[Variation "Svenonius variation"]

e4 e5 Nf3 Nc6 Nc3 Nf6 Bb5 Bb4 O-O O-O d3 Bxc3 bxc3 d5 *

[ECO "C49"]
[Opening "Four knights"]
[Variation "symmetrical variation"]

e4 e5 Nf3 Nc6 Nc3 Nf6 Bb5 Bb4 O-O O-O d3 d6 *

[ECO "C49"]
[Opening "Four knights"]
[Variation "symmetrical, Metger unpin"]

e4 e5 Nf3 Nc6 Nc3 Nf6 Bb5 Bb4 O-O O-O d3 d6 Bg5 Bxc3 bxc3 Qe7 *

[ECO "C49"]
[Opening "Four knights"]
[Variation "symmetrical, Capablanca variation"]

e4 e5 Nf3 Nc6 Nc3 Nf6 Bb5 Bb4 O-O O-O d3 d6 Bg5 Bxc3 bxc3 Qe7 Re1 Nd8 d4 Bg4 *

[ECO "C49"]
[Opening "Four knights"]
[Variation "symmetrical, Pillsbury variation"]

e4 e5 Nf3 Nc6 Nc3 Nf6 Bb5 Bb4 O-O O-O d3 d6 Bg5 Ne7 *

[ECO "C49"]
[Opening "Four knights"]
[Variation "symmetrical, Blake variation"]

e4 e5 Nf3 Nc6 Nc3 Nf6 Bb5 Bb4 O-O O-O d3 d6 Bg5 Ne7 Nh4 c6 Bc4 d5 Bb3 Qd6 *

[ECO "C49"]
[Opening "Four knights"]
[Variation "symmetrical, Tarrasch variation"]

e4 e5 Nf3 Nc6 Nc3 Nf6 Bb5 Bb4 O-O O-O d3 d6 Bg5 Be6 *

[ECO "C49"]
[Opening "Four knights"]
[Variation "symmetrical, Maroczy system"]

e4 e5 Nf3 Nc6 Nc3 Nf6 Bb5 Bb4 O-O O-O d3 d6 Ne2 *

[ECO "C49"]
[Opening "Four knights"]
[Variation "Nimzovich (Paulsen) variation"]

e4 e5 Nf3 Nc6 Nc3 Nf6 Bb5 Bb4 O-O O-O Bxc6 *

[ECO "C50"]
[Opening "King's pawn game"]

e4 e5 Nf3 Nc6 Bc4 *

[ECO "C50"]
[Opening "Blackburne shilling gambit"]

e4 e5 Nf3 Nc6 Bc4 Nd4 Nxe5 Qg5 Nxf7 Qxg2 Rf1 Qxe4+ Be2 Nf3# *

[ECO "C50"]
[Opening "Rousseau gambit"]

e4 e5 Nf3 Nc6 Bc4 f5 *

[ECO "C50"]
[Opening "Hungarian defence"]

e4 e5 Nf3 Nc6 Bc4 Be7 *

[ECO "C50"]
[Opening "Hungarian defence"]
[Variation "Tartakower variation"]

e4 e5 Nf3 Nc6 Bc4 Be7 d4 exd4 c3 Nf6 e5 Ne4 *

[ECO "C50"]
[Opening "Giuoco Piano"]

e4 e5 Nf3 Nc6 Bc4 Bc5 *

[ECO "C50"]
[Opening "Giuoco Piano"]
[Variation "four knights variation"]

e4 e5 Nf3 Nc6 Bc4 Bc5 Nc3 Nf6 *

[ECO "C50"]
[Opening "Giuoco Piano"]
[Variation "Jerome gambit"]

e4 e5 Nf3 Nc6 Bc4 Bc5 Bxf7+ *

[ECO "C50"]
[Opening "Giuoco Pianissimo"]

e4 e5 Nf3 Nc6 Bc4 Bc5 d3 *

[ECO "C50"]
[Opening "Giuoco Pianissimo"]
[Variation "Dubois variation"]

e4 e5 Nf3 Nc6 Bc4 Bc5 d3 f5 Ng5 f4 *

[ECO "C50"]
[Opening "Giuoco Pianissimo"]

e4 e5 Nf3 Nc6 Bc4 Bc5 d3 Nf6 *

[ECO "C50"]
[Opening "Giuoco Pianissimo"]
[Variation "Italian four knights variation"]

e4 e5 Nf3 Nc6 Bc4 Bc5 d3 Nf6 Nc3 *

[ECO "C50"]
[Opening "Giuoco Pianissimo"]
[Variation "Canal variation"]

e4 e5 Nf3 Nc6 Bc4 Bc5 d3 Nf6 Nc3 d6 Bg5 *

[ECO "C51"]
[Opening "Evans gambit declined"]

e4 e5 Nf3 Nc6 Bc4 Bc5 b4 *

[ECO "C51"]
[Opening "Evans gambit declined, Lange variation"]

e4 e5 Nf3 Nc6 Bc4 Bc5 b4 Bb6 b5 Na5 Nxe5 Nh6 *

[ECO "C51"]
[Opening "Evans gambit declined, Pavlov variation"]

e4 e5 Nf3 Nc6 Bc4 Bc5 b4 Bb6 b5 Na5 Nxe5 Nh6 d4 d6 Bxh6 dxe5 Bxg7 Rg8 Bxf7+ Kxf7 Bxe5 Qg5 Nd2 *

[ECO "C51"]
[Opening "Evans gambit declined, Hirschbach variation"]

e4 e5 Nf3 Nc6 Bc4 Bc5 b4 Bb6 b5 Na5 Nxe5 Qg5 *

[ECO "C51"]
[Opening "Evans gambit declined, Vasquez variation"]

e4 e5 Nf3 Nc6 Bc4 Bc5 b4 Bb6 b5 Na5 Nxe5 Qg5 Bxf7+ Ke7 Qh5 *

[ECO "C51"]
[Opening "Evans gambit declined, Hicken variation"]

e4 e5 Nf3 Nc6 Bc4 Bc5 b4 Bb6 b5 Na5 Nxe5 Qg5 Qf3 Qxe5 Qxf7+ Kd8 Bb2 *

[ECO "C51"]
[Opening "Evans gambit declined, 5.a4"]

e4 e5 Nf3 Nc6 Bc4 Bc5 b4 Bb6 a4 *

[ECO "C51"]
[Opening "Evans gambit declined, Showalter variation"]

e4 e5 Nf3 Nc6 Bc4 Bc5 b4 Bb6 a4 a6 Nc3 *

[ECO "C51"]
[Opening "Evans gambit declined, Cordel variation"]

e4 e5 Nf3 Nc6 Bc4 Bc5 b4 Bb6 Bb2 *

[ECO "C51"]
[Opening "Evans counter-gambit"]

e4 e5 Nf3 Nc6 Bc4 Bc5 b4 d5 *

[ECO "C51"]
[Opening "Evans gambit"]

e4 e5 Nf3 Nc6 Bc4 Bc5 b4 Bxb4 *

[ECO "C51"]
[Opening "Evans gambit"]
[Variation "normal variation"]

e4 e5 Nf3 Nc6 Bc4 Bc5 b4 Bxb4 c3 Bc5 d4 exd4 O-O d6 cxd4 Bb6 *

[ECO "C51"]
[Opening "Evans gambit"]
[Variation "Ulvestad variation"]

e4 e5 Nf3 Nc6 Bc4 Bc5 b4 Bxb4 c3 Bc5 d4 exd4 O-O d6 cxd4 Bb6 d5 Na5 Bb2 *

[ECO "C51"]
[Opening "Evans gambit"]
[Variation "Paulsen variation"]

e4 e5 Nf3 Nc6 Bc4 Bc5 b4 Bxb4 c3 Bc5 d4 exd4 O-O d6 cxd4 Bb6 d5 Na5 Bb2 Ne7 *

[ECO "C51"]
[Opening "Evans gambit"]
[Variation "Morphy attack"]

e4 e5 Nf3 Nc6 Bc4 Bc5 b4 Bxb4 c3 Bc5 d4 exd4 O-O d6 cxd4 Bb6 Nc3 *

[ECO "C51"]
[Opening "Evans gambit"]
[Variation "Göring attack"]

e4 e5 Nf3 Nc6 Bc4 Bc5 b4 Bxb4 c3 Bc5 d4 exd4 O-O d6 cxd4 Bb6 Nc3 Na5 Bg5 *

[ECO "C51"]
[Opening "Evans gambit"]
[Variation "Steinitz variation"]

e4 e5 Nf3 Nc6 Bc4 Bc5 b4 Bxb4 c3 Bc5 d4 exd4 O-O d6 cxd4 Bb6 Nc3 Na5 Bg5 f6 Be3 *

[ECO "C51"]
[Opening "Evans gambit"]

e4 e5 Nf3 Nc6 Bc4 Bc5 b4 Bxb4 c3 Bc5 d4 exd4 O-O d6 cxd4 Bb6 Nc3 Bg4 *

[ECO "C51"]
[Opening "Evans gambit"]
[Variation "Fraser attack"]

e4 e5 Nf3 Nc6 Bc4 Bc5 b4 Bxb4 c3 Bc5 d4 exd4 O-O d6 cxd4 Bb6 Nc3 Bg4 Qa4 *

[ECO "C51"]
[Opening "Evans gambit"]
[Variation "Fraser-Mortimer attack"]

e4 e5 Nf3 Nc6 Bc4 Bc5 b4 Bxb4 c3 Bc5 d4 exd4 O-O d6 cxd4 Bb6 Nc3 Bg4 Qa4 Bd7 Qb3 Na5 Bxf7+ Kf8 Qc2 *

[ECO "C51"]
[Opening "Evans gambit"]
[Variation "Stone-Ware variation"]

e4 e5 Nf3 Nc6 Bc4 Bc5 b4 Bxb4 c3 Bd6 *

[ECO "C51"]
[Opening "Evans gambit"]
[Variation "Mayet defence"]

e4 e5 Nf3 Nc6 Bc4 Bc5 b4 Bxb4 c3 Bf8 *

[ECO "C51"]
[Opening "Evans gambit"]
[Variation "5...Be7"]

e4 e5 Nf3 Nc6 Bc4 Bc5 b4 Bxb4 c3 Be7 *

[ECO "C51"]
[Opening "Evans gambit"]
[Variation "Cordel variation"]

e4 e5 Nf3 Nc6 Bc4 Bc5 b4 Bxb4 c3 Be7 d4 Na5 *

[ECO "C52"]
[Opening "Evans gambit"]

e4 e5 Nf3 Nc6 Bc4 Bc5 b4 Bxb4 c3 Ba5 *

[ECO "C52"]
[Opening "Evans gambit"]
[Variation "compromised defence"]

e4 e5 Nf3 Nc6 Bc4 Bc5 b4 Bxb4 c3 Ba5 d4 exd4 O-O dxc3 *

[ECO "C52"]
[Opening "Evans gambit"]
[Variation "compromised defence, Paulsen variation"]

e4 e5 Nf3 Nc6 Bc4 Bc5 b4 Bxb4 c3 Ba5 d4 exd4 O-O dxc3 Qb3 Qf6 e5 Qg6 Nxc3 Nge7 Ba3 *

[ECO "C52"]
[Opening "Evans gambit"]
[Variation "compromised defence, Potter variation"]

e4 e5 Nf3 Nc6 Bc4 Bc5 b4 Bxb4 c3 Ba5 d4 exd4 O-O dxc3 Qb3 Qf6 e5 Qg6 Nxc3 Nge7 Rd1 *

[ECO "C52"]
[Opening "Evans gambit"]
[Variation "Leonhardt variation"]

e4 e5 Nf3 Nc6 Bc4 Bc5 b4 Bxb4 c3 Ba5 d4 b5 *

[ECO "C52"]
[Opening "Evans gambit"]

e4 e5 Nf3 Nc6 Bc4 Bc5 b4 Bxb4 c3 Ba5 d4 d6 *

[ECO "C52"]
[Opening "Evans gambit"]
[Variation "Tartakower attack"]

e4 e5 Nf3 Nc6 Bc4 Bc5 b4 Bxb4 c3 Ba5 d4 d6 Qb3 *

[ECO "C52"]
[Opening "Evans gambit"]
[Variation "Levenfish variation"]

e4 e5 Nf3 Nc6 Bc4 Bc5 b4 Bxb4 c3 Ba5 d4 d6 Qb3 Qd7 dxe5 dxe5 O-O Bb6 Ba3 Na5 Nxe5 *

[ECO "C52"]
[Opening "Evans gambit"]
[Variation "Sokolsky variation"]

e4 e5 Nf3 Nc6 Bc4 Bc5 b4 Bxb4 c3 Ba5 d4 d6 Bg5 *

[ECO "C52"]
[Opening "Evans gambit"]

e4 e5 Nf3 Nc6 Bc4 Bc5 b4 Bxb4 c3 Ba5 O-O *

[ECO "C52"]
[Opening "Evans gambit"]
[Variation "Richardson attack"]

e4 e5 Nf3 Nc6 Bc4 Bc5 b4 Bxb4 c3 Ba5 O-O Nf6 d4 O-O Nxe5 *

[ECO "C52"]
[Opening "Evans gambit"]

e4 e5 Nf3 Nc6 Bc4 Bc5 b4 Bxb4 c3 Ba5 O-O d6 *

[ECO "C52"]
[Opening "Evans gambit"]
[Variation "Waller attack"]

e4 e5 Nf3 Nc6 Bc4 Bc5 b4 Bxb4 c3 Ba5 O-O d6 d4 exd4 Qb3 *

[ECO "C52"]
[Opening "Evans gambit"]
[Variation "Lasker defence"]

e4 e5 Nf3 Nc6 Bc4 Bc5 b4 Bxb4 c3 Ba5 O-O d6 d4 Bb6 *

[ECO "C52"]
[Opening "Evans gambit"]
[Variation "Sanders-Alapin variation"]

e4 e5 Nf3 Nc6 Bc4 Bc5 b4 Bxb4 c3 Ba5 O-O d6 d4 Bd7 *

[ECO "C52"]
[Opening "Evans gambit"]
[Variation "Alapin-Steinitz variation"]

e4 e5 Nf3 Nc6 Bc4 Bc5 b4 Bxb4 c3 Ba5 O-O d6 d4 Bg4 *

[ECO "C53"]
[Opening "Giuoco Piano"]

e4 e5 Nf3 Nc6 Bc4 Bc5 c3 *

[ECO "C53"]
[Opening "Giuoco Piano"]
[Variation "LaBourdonnais variation"]

e4 e5 Nf3 Nc6 Bc4 Bc5 c3 d6 d4 exd4 cxd4 Bb6 *

[ECO "C53"]
[Opening "Giuoco Piano"]
[Variation "close variation"]

e4 e5 Nf3 Nc6 Bc4 Bc5 c3 Qe7 *

[ECO "C53"]
[Opening "Giuoco Piano"]
[Variation "centre-holding variation"]

e4 e5 Nf3 Nc6 Bc4 Bc5 c3 Qe7 d4 Bb6 *

[ECO "C53"]
[Opening "Giuoco Piano"]
[Variation "Tarrasch variation"]

e4 e5 Nf3 Nc6 Bc4 Bc5 c3 Qe7 d4 Bb6 O-O Nf6 a4 a6 Re1 d6 h3 *

[ECO "C53"]
[Opening "Giuoco Piano"]
[Variation "Mestel variation"]

e4 e5 Nf3 Nc6 Bc4 Bc5 c3 Qe7 d4 Bb6 Bg5 *

[ECO "C53"]
[Opening "Giuoco Piano"]
[Variation "Eisinger variation"]

e4 e5 Nf3 Nc6 Bc4 Bc5 c3 Qe7 d4 Bb6 d5 Nb8 d6 *

[ECO "C53"]
[Opening "Giuoco Piano"]

e4 e5 Nf3 Nc6 Bc4 Bc5 c3 Nf6 *

[ECO "C53"]
[Opening "Giuoco Piano"]
[Variation "Bird's attack"]

e4 e5 Nf3 Nc6 Bc4 Bc5 c3 Nf6 b4 *

[ECO "C53"]
[Opening "Giuoco Piano"]

e4 e5 Nf3 Nc6 Bc4 Bc5 c3 Nf6 d4 *

[ECO "C53"]
[Opening "Giuoco Piano"]
[Variation "Ghulam Kassim variation"]

e4 e5 Nf3 Nc6 Bc4 Bc5 c3 Nf6 d4 exd4 e5 Ne4 Bd5 Nxf2 Kxf2 dxc3+ Kg3 *

[ECO "C53"]
[Opening "Giuoco Piano"]

e4 e5 Nf3 Nc6 Bc4 Bc5 c3 Nf6 d4 exd4 e5 d5 *

[ECO "C53"]
[Opening "Giuoco Piano"]
[Variation "Anderssen variation"]

e4 e5 Nf3 Nc6 Bc4 Bc5 c3 Nf6 d4 exd4 e5 d5 Bb5 Ne4 cxd4 Bb4+ *

[ECO "C54"]
[Opening "Giuoco Piano"]

e4 e5 Nf3 Nc6 Bc4 Bc5 c3 Nf6 d4 exd4 cxd4 *

[ECO "C54"]
[Opening "Giuoco Piano"]
[Variation "Krause variation"]

e4 e5 Nf3 Nc6 Bc4 Bc5 c3 Nf6 d4 exd4 cxd4 Bb4+ Bd2 Nxe4 Bxb4 Nxb4 Bxf7+ Kxf7 Qb3+ d5 Ne5+ Kf6 f3 *

[ECO "C54"]
[Opening "Giuoco Piano"]
[Variation "Cracow variation"]

e4 e5 Nf3 Nc6 Bc4 Bc5 c3 Nf6 d4 exd4 cxd4 Bb4+ Kf1 *

[ECO "C54"]
[Opening "Giuoco Piano"]
[Variation "Greco's attack"]

e4 e5 Nf3 Nc6 Bc4 Bc5 c3 Nf6 d4 exd4 cxd4 Bb4+ Nc3 *

[ECO "C54"]
[Opening "Giuoco Piano"]
[Variation "Greco variation"]

e4 e5 Nf3 Nc6 Bc4 Bc5 c3 Nf6 d4 exd4 cxd4 Bb4+ Nc3 Nxe4 O-O Nxc3 *

[ECO "C54"]
[Opening "Giuoco Piano"]
[Variation "Bernstein variation"]

e4 e5 Nf3 Nc6 Bc4 Bc5 c3 Nf6 d4 exd4 cxd4 Bb4+ Nc3 Nxe4 O-O Nxc3 bxc3 Bxc3 Qb3 d5 *

[ECO "C54"]
[Opening "Giuoco Piano"]
[Variation "Aitken variation"]

e4 e5 Nf3 Nc6 Bc4 Bc5 c3 Nf6 d4 exd4 cxd4 Bb4+ Nc3 Nxe4 O-O Nxc3 bxc3 Bxc3 Ba3 *

[ECO "C54"]
[Opening "Giuoco Piano"]

e4 e5 Nf3 Nc6 Bc4 Bc5 c3 Nf6 d4 exd4 cxd4 Bb4+ Nc3 Nxe4 O-O Bxc3 *

[ECO "C54"]
[Opening "Giuoco Piano"]
[Variation "Steinitz variation"]

e4 e5 Nf3 Nc6 Bc4 Bc5 c3 Nf6 d4 exd4 cxd4 Bb4+ Nc3 Nxe4 O-O Bxc3 bxc3 d5 Ba3 *

[ECO "C54"]
[Opening "Giuoco Piano"]
[Variation "Möller (Therkatz) attack"]

e4 e5 Nf3 Nc6 Bc4 Bc5 c3 Nf6 d4 exd4 cxd4 Bb4+ Nc3 Nxe4 O-O Bxc3 d5 *

[ECO "C54"]
[Opening "Giuoco Piano"]
[Variation "Therkatz-Herzog variation"]

e4 e5 Nf3 Nc6 Bc4 Bc5 c3 Nf6 d4 exd4 cxd4 Bb4+ Nc3 Nxe4 O-O Bxc3 d5 Bf6 Re1 Ne7 Rxe4 d6 Bg5 Bxg5 Nxg5 O-O Nxh7 *

[ECO "C54"]
[Opening "Giuoco Piano"]
[Variation "Möller, bayonet attack"]

e4 e5 Nf3 Nc6 Bc4 Bc5 c3 Nf6 d4 exd4 cxd4 Bb4+ Nc3 Nxe4 O-O Bxc3 d5 Bf6 Re1 Ne7 Rxe4 d6 g4 *

[ECO "C55"]
[Opening "Two knights defence"]

e4 e5 Nf3 Nc6 Bc4 Nf6 *

[ECO "C55"]
[Opening "Giuoco Piano"]
[Variation "Rosentreter variation"]

e4 e5 Nf3 Nc6 Bc4 Nf6 O-O Bc5 d4 Bxd4 Nxd4 Nxd4 Bg5 h6 Bh4 g5 f4 *

[ECO "C55"]
[Opening "Giuoco Piano"]

e4 e5 Nf3 Nc6 Bc4 Nf6 O-O Bc5 d4 Bxd4 Nxd4 Nxd4 Bg5 d6 *

[ECO "C55"]
[Opening "Giuoco Piano"]
[Variation "Holzhausen attack"]

e4 e5 Nf3 Nc6 Bc4 Nf6 O-O Bc5 d4 Bxd4 Nxd4 Nxd4 Bg5 d6 f4 Qe7 fxe5 dxe5 Nc3 *

[ECO "C55"]
[Opening "Two knights defence (Modern bishop's opening)"]

e4 e5 Nf3 Nc6 Bc4 Nf6 d3 *

[ECO "C55"]
[Opening "Two knights defence"]

e4 e5 Nf3 Nc6 Bc4 Nf6 d4 *

[ECO "C55"]
[Opening "Two knights defence, Keidanz variation"]

e4 e5 Nf3 Nc6 Bc4 Nf6 d4 exd4 e5 d5 Bb5 Ne4 Nxd4 Bc5 Nxc6 Bxf2+ Kf1 Qh4 *

[ECO "C55"]
[Opening "Two knights defence, Perreux variation"]

e4 e5 Nf3 Nc6 Bc4 Nf6 d4 exd4 Ng5 *

[ECO "C55"]
[Opening "Two knights defence"]

e4 e5 Nf3 Nc6 Bc4 Nf6 d4 exd4 O-O *

[ECO "C55"]
[Opening "Two knights"]
[Variation "Max Lange attack"]

e4 e5 Nf3 Nc6 Bc4 Nf6 d4 exd4 O-O Bc5 e5 *

[ECO "C55"]
[Opening "Two knights"]
[Variation "Max Lange attack, Berger variation"]

e4 e5 Nf3 Nc6 Bc4 Nf6 d4 exd4 O-O Bc5 e5 d5 exf6 dxc4 Re1+ Be6 Ng5 Qd5 Nc3 Qf5 g4 Qg6 Nce4 Bb6 f4 O-O-O *

[ECO "C55"]
[Opening "Two knights"]
[Variation "Max Lange attack, Marshall variation"]

e4 e5 Nf3 Nc6 Bc4 Nf6 d4 exd4 O-O Bc5 e5 d5 exf6 dxc4 Re1+ Be6 Ng5 Qd5 Nc3 Qf5 Nce4 *

[ECO "C55"]
[Opening "Two knights"]
[Variation "Max Lange attack, Rubinstein variation"]

e4 e5 Nf3 Nc6 Bc4 Nf6 d4 exd4 O-O Bc5 e5 d5 exf6 dxc4 Re1+ Be6 Ng5 Qd5 Nc3 Qf5 Nce4 Bf8 *

[ECO "C55"]
[Opening "Two knights"]
[Variation "Max Lange attack, Loman defence"]

e4 e5 Nf3 Nc6 Bc4 Nf6 d4 exd4 O-O Bc5 e5 d5 exf6 dxc4 Re1+ Be6 Ng5 g6 *

[ECO "C55"]
[Opening "Two knights"]
[Variation "Max Lange attack, Schlechter variation"]

e4 e5 Nf3 Nc6 Bc4 Nf6 d4 exd4 O-O Bc5 e5 d5 exf6 dxc4 Re1+ Be6 fxg7 *

[ECO "C55"]
[Opening "Two knights"]
[Variation "Max Lange attack, Steinitz variation"]

e4 e5 Nf3 Nc6 Bc4 Nf6 d4 exd4 O-O Bc5 e5 Ng4 *

[ECO "C55"]
[Opening "Two knights"]
[Variation "Max Lange attack, Krause variation"]

e4 e5 Nf3 Nc6 Bc4 Nf6 d4 exd4 O-O Bc5 e5 Ng4 c3 *

[ECO "C56"]
[Opening "Two knights defence"]

e4 e5 Nf3 Nc6 Bc4 Nf6 d4 exd4 O-O Nxe4 *

[ECO "C56"]
[Opening "Two knights defence"]
[Variation "Yurdansky attack"]

e4 e5 Nf3 Nc6 Bc4 Nf6 d4 exd4 O-O Nxe4 Re1 d5 Bxd5 Qxd5 Nc3 Qa5 Nxe4 Be6 Bg5 h6 Bh4 g5 Nf6+ Ke7 b4 *

[ECO "C56"]
[Opening "Two knights defence"]
[Variation "Canal variation"]

e4 e5 Nf3 Nc6 Bc4 Nf6 d4 exd4 O-O Nxe4 Re1 d5 Nc3 *

[ECO "C57"]
[Opening "Two knights defence"]

e4 e5 Nf3 Nc6 Bc4 Nf6 Ng5 *

[ECO "C57"]
[Opening "Two knights defence"]
[Variation "Wilkes Barre (Traxler) variation"]

e4 e5 Nf3 Nc6 Bc4 Nf6 Ng5 Bc5 *

[ECO "C57"]
[Opening "Two knights defence"]
[Variation "Ulvestad variation"]

e4 e5 Nf3 Nc6 Bc4 Nf6 Ng5 d5 exd5 b5 *

[ECO "C57"]
[Opening "Two knights defence"]
[Variation "Fritz variation"]

e4 e5 Nf3 Nc6 Bc4 Nf6 Ng5 d5 exd5 Nd4 *

[ECO "C57"]
[Opening "Two knights defence"]
[Variation "Fritz, Gruber variation"]

e4 e5 Nf3 Nc6 Bc4 Nf6 Ng5 d5 exd5 Nd4 c3 b5 Bf1 Nxd5 Ne4 *

[ECO "C57"]
[Opening "Two knights defence"]
[Variation "Lolli attack"]

e4 e5 Nf3 Nc6 Bc4 Nf6 Ng5 d5 exd5 Nxd5 d4 *

[ECO "C57"]
[Opening "Two knights defence"]
[Variation "Pincus variation"]

e4 e5 Nf3 Nc6 Bc4 Nf6 Ng5 d5 exd5 Nxd5 d4 Bb4+ *

[ECO "C57"]
[Opening "Two knights defence"]
[Variation "Fegatello attack"]

e4 e5 Nf3 Nc6 Bc4 Nf6 Ng5 d5 exd5 Nxd5 Nxf7 *

[ECO "C57"]
[Opening "Two knights defence"]
[Variation "Fegatello attack, Leonhardt variation"]

e4 e5 Nf3 Nc6 Bc4 Nf6 Ng5 d5 exd5 Nxd5 Nxf7 Kxf7 Qf3+ Ke6 Nc3 Nb4 Qe4 c6 a3 Na6 d4 Nc7 *

[ECO "C57"]
[Opening "Two knights defence"]
[Variation "Fegatello attack, Polerio defence"]

e4 e5 Nf3 Nc6 Bc4 Nf6 Ng5 d5 exd5 Nxd5 Nxf7 Kxf7 Qf3+ Ke6 Nc3 Ne7 *

[ECO "C58"]
[Opening "Two knights defence"]

e4 e5 Nf3 Nc6 Bc4 Nf6 Ng5 d5 exd5 Na5 *

[ECO "C58"]
[Opening "Two knights defence"]
[Variation "Kieseritsky variation"]

e4 e5 Nf3 Nc6 Bc4 Nf6 Ng5 d5 exd5 Na5 d3 *

[ECO "C58"]
[Opening "Two knights defence"]
[Variation "Yankovich variation"]

e4 e5 Nf3 Nc6 Bc4 Nf6 Ng5 d5 exd5 Na5 d3 h6 Nf3 e4 Qe2 Nxc4 dxc4 Bc5 Nfd2 *

[ECO "C58"]
[Opening "Two knights defence"]
[Variation "Maroczy variation"]

e4 e5 Nf3 Nc6 Bc4 Nf6 Ng5 d5 exd5 Na5 d3 h6 Nf3 e4 Qe2 Nxc4 dxc4 Be7 *

[ECO "C58"]
[Opening "Two knights defence"]

e4 e5 Nf3 Nc6 Bc4 Nf6 Ng5 d5 exd5 Na5 Bb5+ *

[ECO "C58"]
[Opening "Two knights defence"]
[Variation "Bogolyubov variation"]

e4 e5 Nf3 Nc6 Bc4 Nf6 Ng5 d5 exd5 Na5 Bb5+ c6 dxc6 bxc6 Qf3 *

[ECO "C58"]
[Opening "Two knights defence"]
[Variation "Paoli variation"]

e4 e5 Nf3 Nc6 Bc4 Nf6 Ng5 d5 exd5 Na5 Bb5+ c6 dxc6 bxc6 Qf3 Qc7 Bd3 *

[ECO "C58"]
[Opening "Two knights defence"]
[Variation "Colman variation"]

e4 e5 Nf3 Nc6 Bc4 Nf6 Ng5 d5 exd5 Na5 Bb5+ c6 dxc6 bxc6 Qf3 Rb8 *

[ECO "C58"]
[Opening "Two knights defence"]
[Variation "Blackburne variation"]

e4 e5 Nf3 Nc6 Bc4 Nf6 Ng5 d5 exd5 Na5 Bb5+ c6 dxc6 bxc6 Qf3 cxb5 *

[ECO "C58"]
[Opening "Two knights defence"]

e4 e5 Nf3 Nc6 Bc4 Nf6 Ng5 d5 exd5 Na5 Bb5+ c6 dxc6 bxc6 Be2 *

[ECO "C59"]
[Opening "Two knights defence"]

e4 e5 Nf3 Nc6 Bc4 Nf6 Ng5 d5 exd5 Na5 Bb5+ c6 dxc6 bxc6 Be2 h6 *

[ECO "C59"]
[Opening "Two knights defence"]
[Variation "Knorre variation"]

e4 e5 Nf3 Nc6 Bc4 Nf6 Ng5 d5 exd5 Na5 Bb5+ c6 dxc6 bxc6 Be2 h6 Nf3 e4 Ne5 Bd6 d4 Qc7 Bd2 *

[ECO "C59"]
[Opening "Two knights defence"]
[Variation "Göring variation"]

e4 e5 Nf3 Nc6 Bc4 Nf6 Ng5 d5 exd5 Na5 Bb5+ c6 dxc6 bxc6 Be2 h6 Nf3 e4 Ne5 Qc7 *

[ECO "C59"]
[Opening "Two knights defence"]
[Variation "Steinitz variation"]

e4 e5 Nf3 Nc6 Bc4 Nf6 Ng5 d5 exd5 Na5 Bb5+ c6 dxc6 bxc6 Be2 h6 Nh3 *

[ECO "C60"]
[Opening "Ruy Lopez (Spanish opening)"]

e4 e5 Nf3 Nc6 Bb5 *

[ECO "C60"]
[Opening "Ruy Lopez"]
[Variation "Nuremberg variation"]

e4 e5 Nf3 Nc6 Bb5 f6 *

[ECO "C60"]
[Opening "Ruy Lopez"]
[Variation "Pollock defence"]

e4 e5 Nf3 Nc6 Bb5 Na5 *

[ECO "C60"]
[Opening "Ruy Lopez"]
[Variation "Lucena defence"]

e4 e5 Nf3 Nc6 Bb5 Be7 *

[ECO "C60"]
[Opening "Ruy Lopez"]
[Variation "Vinogradov variation"]

e4 e5 Nf3 Nc6 Bb5 Qe7 *

[ECO "C60"]
[Opening "Ruy Lopez"]
[Variation "Brentano defence"]

e4 e5 Nf3 Nc6 Bb5 g5 *

[ECO "C60"]
[Opening "Ruy Lopez"]
[Variation "fianchetto (Smyslov/Barnes) defence"]

e4 e5 Nf3 Nc6 Bb5 g6 *

[ECO "C60"]
[Opening "Ruy Lopez"]
[Variation "Cozio defence"]

e4 e5 Nf3 Nc6 Bb5 Nge7 *

[ECO "C60"]
[Opening "Ruy Lopez"]
[Variation "Cozio defence, Paulsen variation"]

e4 e5 Nf3 Nc6 Bb5 Nge7 Nc3 g6 *

[ECO "C61"]
[Opening "Ruy Lopez"]
[Variation "Bird's defence"]

e4 e5 Nf3 Nc6 Bb5 Nd4 *

[ECO "C61"]
[Opening "Ruy Lopez"]
[Variation "Bird's defence, Paulsen variation"]

e4 e5 Nf3 Nc6 Bb5 Nd4 Nxd4 exd4 O-O Ne7 *

[ECO "C62"]
[Opening "Ruy Lopez"]
[Variation "old Steinitz defence"]

e4 e5 Nf3 Nc6 Bb5 d6 *

[ECO "C62"]
[Opening "Ruy Lopez"]
[Variation "old Steinitz defence, Nimzovich attack"]

e4 e5 Nf3 Nc6 Bb5 d6 d4 Bd7 Nc3 Nf6 Bxc6 *

[ECO "C62"]
[Opening "Ruy Lopez"]
[Variation "old Steinitz defence, semi-Duras variation"]

e4 e5 Nf3 Nc6 Bb5 d6 d4 Bd7 c4 *

[ECO "C63"]
[Opening "Ruy Lopez"]
[Variation "Schliemann defence"]

e4 e5 Nf3 Nc6 Bb5 f5 *

[ECO "C63"]
[Opening "Ruy Lopez"]
[Variation "Schliemann defence, Berger variation"]

e4 e5 Nf3 Nc6 Bb5 f5 Nc3 *

[ECO "C64"]
[Opening "Ruy Lopez"]
[Variation "classical (Cordel) defence"]

e4 e5 Nf3 Nc6 Bb5 Bc5 *

[ECO "C64"]
[Opening "Ruy Lopez"]
[Variation "classical defence, Zaitsev variation"]

e4 e5 Nf3 Nc6 Bb5 Bc5 O-O Nd4 b4 *

[ECO "C64"]
[Opening "Ruy Lopez"]
[Variation "classical defence, 4.c3"]

e4 e5 Nf3 Nc6 Bb5 Bc5 c3 *

[ECO "C64"]
[Opening "Ruy Lopez"]
[Variation "classical defence, Benelux variation"]

e4 e5 Nf3 Nc6 Bb5 Bc5 c3 Nf6 O-O O-O d4 Bb6 *

[ECO "C64"]
[Opening "Ruy Lopez"]
[Variation "classical defence, Charousek variation"]

e4 e5 Nf3 Nc6 Bb5 Bc5 c3 Bb6 *

[ECO "C64"]
[Opening "Ruy Lopez"]
[Variation "classical defence, Boden variation"]

e4 e5 Nf3 Nc6 Bb5 Bc5 c3 Qe7 *

[ECO "C64"]
[Opening "Ruy Lopez"]
[Variation "Cordel gambit"]

e4 e5 Nf3 Nc6 Bb5 Bc5 c3 f5 *

[ECO "C65"]
[Opening "Ruy Lopez"]
[Variation "Berlin defence"]

e4 e5 Nf3 Nc6 Bb5 Nf6 *

[ECO "C65"]
[Opening "Ruy Lopez"]
[Variation "Berlin defence, Nyholm attack"]

e4 e5 Nf3 Nc6 Bb5 Nf6 d4 exd4 O-O *

[ECO "C65"]
[Opening "Ruy Lopez"]
[Variation "Berlin defence, Mortimer variation"]

e4 e5 Nf3 Nc6 Bb5 Nf6 d3 Ne7 *

[ECO "C65"]
[Opening "Ruy Lopez"]
[Variation "Berlin defence, Mortimer trap"]

e4 e5 Nf3 Nc6 Bb5 Nf6 d3 Ne7 Nxe5 c6 *

[ECO "C65"]
[Opening "Ruy Lopez"]
[Variation "Berlin defence, Anderssen variation"]

e4 e5 Nf3 Nc6 Bb5 Nf6 d3 d6 Bxc6+ *

[ECO "C65"]
[Opening "Ruy Lopez"]
[Variation "Berlin defence, Duras variation"]

e4 e5 Nf3 Nc6 Bb5 Nf6 d3 d6 c4 *

[ECO "C65"]
[Opening "Ruy Lopez"]
[Variation "Berlin defence, Kaufmann variation"]

e4 e5 Nf3 Nc6 Bb5 Nf6 d3 Bc5 Be3 *

[ECO "C65"]
[Opening "Ruy Lopez"]
[Variation "Berlin defence, 4.O-O"]

e4 e5 Nf3 Nc6 Bb5 Nf6 O-O *

[ECO "C65"]
[Opening "Ruy Lopez"]
[Variation "Berlin defence, Beverwijk variation"]

e4 e5 Nf3 Nc6 Bb5 Nf6 O-O Bc5 *

[ECO "C66"]
[Opening "Ruy Lopez"]
[Variation "Berlin defence, 4.O-O, d6"]

e4 e5 Nf3 Nc6 Bb5 Nf6 O-O d6 *

[ECO "C66"]
[Opening "Ruy Lopez"]
[Variation "Berlin defence, hedgehog variation"]

e4 e5 Nf3 Nc6 Bb5 Nf6 O-O d6 d4 Bd7 Nc3 Be7 *

[ECO "C66"]
[Opening "Ruy Lopez"]
[Variation "Berlin defence, Tarrasch trap"]

e4 e5 Nf3 Nc6 Bb5 Nf6 O-O d6 d4 Bd7 Nc3 Be7 Re1 O-O *

[ECO "C66"]
[Opening "Ruy Lopez"]
[Variation "closed Berlin defence, Bernstein variation"]

e4 e5 Nf3 Nc6 Bb5 Nf6 O-O d6 d4 Bd7 Nc3 Be7 Bg5 *

[ECO "C66"]
[Opening "Ruy Lopez"]
[Variation "closed Berlin defence, Showalter variation"]

e4 e5 Nf3 Nc6 Bb5 Nf6 O-O d6 d4 Bd7 Nc3 Be7 Bxc6 *

[ECO "C66"]
[Opening "Ruy Lopez"]
[Variation "closed Berlin defence, Wolf variation"]

e4 e5 Nf3 Nc6 Bb5 Nf6 O-O d6 d4 Bd7 Nc3 exd4 *

[ECO "C66"]
[Opening "Ruy Lopez"]
[Variation "closed Berlin defence, Chigorin variation"]

e4 e5 Nf3 Nc6 Bb5 Nf6 O-O d6 d4 Nd7 *

[ECO "C67"]
[Opening "Ruy Lopez"]
[Variation "Berlin defence, open variation"]

e4 e5 Nf3 Nc6 Bb5 Nf6 O-O Nxe4 *

[ECO "C67"]
[Opening "Ruy Lopez"]
[Variation "open Berlin defence, l'Hermet variation"]

e4 e5 Nf3 Nc6 Bb5 Nf6 O-O Nxe4 d4 Nd6 dxe5 *

[ECO "C67"]
[Opening "Ruy Lopez"]
[Variation "open Berlin defence, Showalter variation"]

e4 e5 Nf3 Nc6 Bb5 Nf6 O-O Nxe4 d4 Nd6 Ba4 *

[ECO "C67"]
[Opening "Ruy Lopez"]
[Variation "open Berlin defence, 5...Be7"]

e4 e5 Nf3 Nc6 Bb5 Nf6 O-O Nxe4 d4 Be7 *

[ECO "C67"]
[Opening "Ruy Lopez"]
[Variation "Berlin defence, Rio de Janeiro variation"]

e4 e5 Nf3 Nc6 Bb5 Nf6 O-O Nxe4 d4 Be7 Qe2 Nd6 Bxc6 bxc6 dxe5 Nb7 Nc3 O-O Re1 Nc5 Nd4 Ne6 Be3 Nxd4 Bxd4 c5 *

[ECO "C67"]
[Opening "Ruy Lopez"]
[Variation "Berlin defence, Zukertort variation"]

e4 e5 Nf3 Nc6 Bb5 Nf6 O-O Nxe4 d4 Be7 Qe2 Nd6 Bxc6 bxc6 dxe5 Nb7 c4 *

[ECO "C67"]
[Opening "Ruy Lopez"]
[Variation "Berlin defence, Pillsbury variation"]

e4 e5 Nf3 Nc6 Bb5 Nf6 O-O Nxe4 d4 Be7 Qe2 Nd6 Bxc6 bxc6 dxe5 Nb7 b3 *

[ECO "C67"]
[Opening "Ruy Lopez"]
[Variation "Berlin defence, Winawer attack"]

e4 e5 Nf3 Nc6 Bb5 Nf6 O-O Nxe4 d4 Be7 Qe2 Nd6 Bxc6 bxc6 dxe5 Nb7 Nd4 *

[ECO "C67"]
[Opening "Ruy Lopez"]
[Variation "Berlin defence, Cordel variation"]

e4 e5 Nf3 Nc6 Bb5 Nf6 O-O Nxe4 d4 Be7 Qe2 Nd6 Bxc6 bxc6 dxe5 Nf5 *

[ECO "C67"]
[Opening "Ruy Lopez"]
[Variation "Berlin defence, Trifunovic variation"]

e4 e5 Nf3 Nc6 Bb5 Nf6 O-O Nxe4 d4 Be7 Qe2 d5 *

[ECO "C67"]
[Opening "Ruy Lopez"]
[Variation "Berlin defence, Minckwitz variation"]

e4 e5 Nf3 Nc6 Bb5 Nf6 O-O Nxe4 d4 Be7 dxe5 *

[ECO "C67"]
[Opening "Ruy Lopez"]
[Variation "Berlin defence, Rosenthal variation"]

e4 e5 Nf3 Nc6 Bb5 Nf6 O-O Nxe4 d4 a6 *

[ECO "C68"]
[Opening "Ruy Lopez"]
[Variation "exchange variation"]

e4 e5 Nf3 Nc6 Bb5 a6 Bxc6 *

[ECO "C68"]
[Opening "Ruy Lopez"]
[Variation "exchange, Alekhine variation"]

e4 e5 Nf3 Nc6 Bb5 a6 Bxc6 dxc6 d4 exd4 Qxd4 Qxd4 Nxd4 Bd7 *

[ECO "C68"]
[Opening "Ruy Lopez"]
[Variation "exchange, Keres variation"]

e4 e5 Nf3 Nc6 Bb5 a6 Bxc6 dxc6 Nc3 *

[ECO "C68"]
[Opening "Ruy Lopez"]
[Variation "exchange, Romanovsky variation"]

e4 e5 Nf3 Nc6 Bb5 a6 Bxc6 dxc6 Nc3 f6 d3 *

[ECO "C69"]
[Opening "Ruy Lopez"]
[Variation "exchange variation, 5.O-O"]

e4 e5 Nf3 Nc6 Bb5 a6 Bxc6 dxc6 O-O *

[ECO "C69"]
[Opening "Ruy Lopez"]
[Variation "exchange variation, Alapin gambit"]

e4 e5 Nf3 Nc6 Bb5 a6 Bxc6 dxc6 O-O Bg4 h3 h5 *

[ECO "C69"]
[Opening "Ruy Lopez"]
[Variation "exchange, Gligoric variation"]

e4 e5 Nf3 Nc6 Bb5 a6 Bxc6 dxc6 O-O f6 *

[ECO "C69"]
[Opening "Ruy Lopez"]
[Variation "exchange, Bronstein variation"]

e4 e5 Nf3 Nc6 Bb5 a6 Bxc6 dxc6 O-O Qd6 *

[ECO "C70"]
[Opening "Ruy Lopez"]

e4 e5 Nf3 Nc6 Bb5 a6 Ba4 *

[ECO "C70"]
[Opening "Ruy Lopez"]
[Variation "fianchetto defence deferred"]

e4 e5 Nf3 Nc6 Bb5 a6 Ba4 g6 *

[ECO "C70"]
[Opening "Ruy Lopez"]
[Variation "Cozio defence deferred"]

e4 e5 Nf3 Nc6 Bb5 a6 Ba4 Nge7 *

[ECO "C70"]
[Opening "Ruy Lopez"]
[Variation "Bird's defence deferred"]

e4 e5 Nf3 Nc6 Bb5 a6 Ba4 Nd4 *

[ECO "C70"]
[Opening "Ruy Lopez"]
[Variation "Alapin's defence deferred"]

e4 e5 Nf3 Nc6 Bb5 a6 Ba4 Bb4 *

[ECO "C70"]
[Opening "Ruy Lopez"]
[Variation "Classical defence deferred"]

e4 e5 Nf3 Nc6 Bb5 a6 Ba4 Bc5 *

[ECO "C70"]
[Opening "Ruy Lopez"]
[Variation "Caro variation"]

e4 e5 Nf3 Nc6 Bb5 a6 Ba4 b5 *

[ECO "C70"]
[Opening "Ruy Lopez"]
[Variation "Graz variation"]

e4 e5 Nf3 Nc6 Bb5 a6 Ba4 b5 Bb3 Bc5 *

[ECO "C70"]
[Opening "Ruy Lopez"]
[Variation "Taimanov (chase/wing/accelerated counterthrust) variation"]

e4 e5 Nf3 Nc6 Bb5 a6 Ba4 b5 Bb3 Na5 *

[ECO "C70"]
[Opening "Ruy Lopez"]
[Variation "Schliemann defence deferred"]

e4 e5 Nf3 Nc6 Bb5 a6 Ba4 f5 *

[ECO "C71"]
[Opening "Ruy Lopez"]
[Variation "modern Steinitz defence"]

e4 e5 Nf3 Nc6 Bb5 a6 Ba4 d6 *

[ECO "C71"]
[Opening "Ruy Lopez"]
[Variation "Noah's ark trap"]

e4 e5 Nf3 Nc6 Bb5 a6 Ba4 d6 d4 b5 Bb3 Nxd4 Nxd4 exd4 Qxd4 c5 *

[ECO "C71"]
[Opening "Ruy Lopez"]
[Variation "modern Steinitz defence, Three knights variation"]

e4 e5 Nf3 Nc6 Bb5 a6 Ba4 d6 Nc3 *

[ECO "C71"]
[Opening "Ruy Lopez"]
[Variation "modern Steinitz defence, Duras (Keres) variation"]

e4 e5 Nf3 Nc6 Bb5 a6 Ba4 d6 c4 *

[ECO "C72"]
[Opening "Ruy Lopez"]
[Variation "modern Steinitz defence, 5.O-O"]

e4 e5 Nf3 Nc6 Bb5 a6 Ba4 d6 O-O *

[ECO "C73"]
[Opening "Ruy Lopez"]
[Variation "modern Steinitz defence, Richter variation"]

e4 e5 Nf3 Nc6 Bb5 a6 Ba4 d6 Bxc6+ bxc6 d4 *

[ECO "C73"]
[Opening "Ruy Lopez"]
[Variation "modern Steinitz defence, Alapin variation"]

e4 e5 Nf3 Nc6 Bb5 a6 Ba4 d6 Bxc6+ bxc6 d4 f6 *

[ECO "C74"]
[Opening "Ruy Lopez"]
[Variation "modern Steinitz defence"]

e4 e5 Nf3 Nc6 Bb5 a6 Ba4 d6 c3 *

[ECO "C74"]
[Opening "Ruy Lopez"]
[Variation "modern Steinitz defence, siesta variation"]

e4 e5 Nf3 Nc6 Bb5 a6 Ba4 d6 c3 f5 *

[ECO "C74"]
[Opening "Ruy Lopez"]
[Variation "Siesta, Kopayev variation"]

e4 e5 Nf3 Nc6 Bb5 a6 Ba4 d6 c3 f5 exf5 Bxf5 O-O *

[ECO "C75"]
[Opening "Ruy Lopez"]
[Variation "modern Steinitz defence"]

e4 e5 Nf3 Nc6 Bb5 a6 Ba4 d6 c3 Bd7 *

[ECO "C75"]
[Opening "Ruy Lopez"]
[Variation "modern Steinitz defence, Rubinstein variation"]

e4 e5 Nf3 Nc6 Bb5 a6 Ba4 d6 c3 Bd7 d4 Nge7 *

[ECO "C76"]
[Opening "Ruy Lopez"]
[Variation "modern Steinitz defence, fianchetto (Bronstein) variation"]

e4 e5 Nf3 Nc6 Bb5 a6 Ba4 d6 c3 Bd7 d4 g6 *

[ECO "C77"]
[Opening "Ruy Lopez"]
[Variation "Morphy defence"]

e4 e5 Nf3 Nc6 Bb5 a6 Ba4 Nf6 *

[ECO "C77"]
[Opening "Ruy Lopez"]
[Variation "four knights (Tarrasch) variation"]

e4 e5 Nf3 Nc6 Bb5 a6 Ba4 Nf6 Nc3 *

[ECO "C77"]
[Opening "Ruy Lopez"]
[Variation "Treybal (Bayreuth) variation (exchange var. deferred)"]

e4 e5 Nf3 Nc6 Bb5 a6 Ba4 Nf6 Bxc6 *

[ECO "C77"]
[Opening "Ruy Lopez"]
[Variation "Wormald (Alapin) attack"]

e4 e5 Nf3 Nc6 Bb5 a6 Ba4 Nf6 Qe2 *

[ECO "C77"]
[Opening "Ruy Lopez"]
[Variation "Wormald attack, Grünfeld variation"]

e4 e5 Nf3 Nc6 Bb5 a6 Ba4 Nf6 Qe2 b5 Bb3 Be7 d4 d6 c3 Bg4 *

[ECO "C77"]
[Opening "Ruy Lopez"]
[Variation "Anderssen variation"]

e4 e5 Nf3 Nc6 Bb5 a6 Ba4 Nf6 d3 *

[ECO "C77"]
[Opening "Ruy Lopez"]
[Variation "Morphy defence, Duras variation"]

e4 e5 Nf3 Nc6 Bb5 a6 Ba4 Nf6 d3 d6 c4 *

[ECO "C78"]
[Opening "Ruy Lopez"]
[Variation "5.O-O"]

e4 e5 Nf3 Nc6 Bb5 a6 Ba4 Nf6 O-O *

[ECO "C78"]
[Opening "Ruy Lopez"]
[Variation "Wing attack"]

e4 e5 Nf3 Nc6 Bb5 a6 Ba4 Nf6 O-O b5 Bb3 Be7 a4 *

[ECO "C78"]
[Opening "Ruy Lopez"]
[Variation "...b5 & ...d6"]

e4 e5 Nf3 Nc6 Bb5 a6 Ba4 Nf6 O-O b5 Bb3 d6 *

[ECO "C78"]
[Opening "Ruy Lopez"]
[Variation "Rabinovich variation"]

e4 e5 Nf3 Nc6 Bb5 a6 Ba4 Nf6 O-O b5 Bb3 d6 Ng5 d5 exd5 Nd4 Re1 Bc5 Rxe5+ Kf8 *

[ECO "C78"]
[Opening "Ruy Lopez"]
[Variation "Archangelsk (counterthrust) variation"]

e4 e5 Nf3 Nc6 Bb5 a6 Ba4 Nf6 O-O b5 Bb3 Bb7 *

[ECO "C78"]
[Opening "Ruy Lopez"]
[Variation "Möller defence"]

e4 e5 Nf3 Nc6 Bb5 a6 Ba4 Nf6 O-O Bc5 *

[ECO "C79"]
[Opening "Ruy Lopez"]
[Variation "Steinitz defence deferred (Russian defence)"]

e4 e5 Nf3 Nc6 Bb5 a6 Ba4 Nf6 O-O d6 *

[ECO "C79"]
[Opening "Ruy Lopez"]
[Variation "Steinitz defence deferred, Lipnitsky variation"]

e4 e5 Nf3 Nc6 Bb5 a6 Ba4 Nf6 O-O d6 Bxc6+ bxc6 d4 Bg4 *

[ECO "C79"]
[Opening "Ruy Lopez"]
[Variation "Steinitz defence deferred, Rubinstein variation"]

e4 e5 Nf3 Nc6 Bb5 a6 Ba4 Nf6 O-O d6 Bxc6+ bxc6 d4 Nxe4 *

[ECO "C79"]
[Opening "Ruy Lopez"]
[Variation "Steinitz defence deferred, Boleslavsky variation"]

e4 e5 Nf3 Nc6 Bb5 a6 Ba4 Nf6 O-O d6 Bxc6+ bxc6 d4 Nxe4 Re1 f5 dxe5 d5 Nc3 *

[ECO "C80"]
[Opening "Ruy Lopez"]
[Variation "open (Tarrasch) defence"]

e4 e5 Nf3 Nc6 Bb5 a6 Ba4 Nf6 O-O Nxe4 *

[ECO "C80"]
[Opening "Ruy Lopez"]
[Variation "open, Tartakower variation"]

e4 e5 Nf3 Nc6 Bb5 a6 Ba4 Nf6 O-O Nxe4 Qe2 *

[ECO "C80"]
[Opening "Ruy Lopez"]
[Variation "open, Knorre variation"]

e4 e5 Nf3 Nc6 Bb5 a6 Ba4 Nf6 O-O Nxe4 Nc3 *

[ECO "C80"]
[Opening "Ruy Lopez"]
[Variation "open, 6.d4"]

e4 e5 Nf3 Nc6 Bb5 a6 Ba4 Nf6 O-O Nxe4 d4 *

[ECO "C80"]
[Opening "Ruy Lopez"]
[Variation "open, Riga variation"]

e4 e5 Nf3 Nc6 Bb5 a6 Ba4 Nf6 O-O Nxe4 d4 exd4 *

[ECO "C80"]
[Opening "Ruy Lopez"]
[Variation "open, 6.d4 b5"]

e4 e5 Nf3 Nc6 Bb5 a6 Ba4 Nf6 O-O Nxe4 d4 b5 *

[ECO "C80"]
[Opening "Ruy Lopez"]
[Variation "open, Friess attack"]

e4 e5 Nf3 Nc6 Bb5 a6 Ba4 Nf6 O-O Nxe4 d4 b5 Nxe5 *

[ECO "C80"]
[Opening "Ruy Lopez"]
[Variation "open, Richter variation"]

e4 e5 Nf3 Nc6 Bb5 a6 Ba4 Nf6 O-O Nxe4 d4 b5 d5 *

[ECO "C80"]
[Opening "Ruy Lopez"]
[Variation "open, 7.Bb3"]

e4 e5 Nf3 Nc6 Bb5 a6 Ba4 Nf6 O-O Nxe4 d4 b5 Bb3 *

[ECO "C80"]
[Opening "Ruy Lopez"]
[Variation "open, Schlechter defence"]

e4 e5 Nf3 Nc6 Bb5 a6 Ba4 Nf6 O-O Nxe4 d4 b5 Bb3 d5 a4 Nxd4 *

[ECO "C80"]
[Opening "Ruy Lopez"]
[Variation "open, Berger variation"]

e4 e5 Nf3 Nc6 Bb5 a6 Ba4 Nf6 O-O Nxe4 d4 b5 Bb3 d5 a4 Nxd4 Nxd4 exd4 Nc3 *

[ECO "C80"]
[Opening "Ruy Lopez"]
[Variation "open, Harksen gambit"]

e4 e5 Nf3 Nc6 Bb5 a6 Ba4 Nf6 O-O Nxe4 d4 b5 Bb3 d5 c4 *

[ECO "C80"]
[Opening "Ruy Lopez"]
[Variation "open, 8.de"]

e4 e5 Nf3 Nc6 Bb5 a6 Ba4 Nf6 O-O Nxe4 d4 b5 Bb3 d5 dxe5 *

[ECO "C80"]
[Opening "Ruy Lopez"]
[Variation "open, Zukertort variation"]

e4 e5 Nf3 Nc6 Bb5 a6 Ba4 Nf6 O-O Nxe4 d4 b5 Bb3 d5 dxe5 Ne7 *

[ECO "C80"]
[Opening "Ruy Lopez"]
[Variation "open, 8...Be6"]

e4 e5 Nf3 Nc6 Bb5 a6 Ba4 Nf6 O-O Nxe4 d4 b5 Bb3 d5 dxe5 Be6 *

[ECO "C80"]
[Opening "Ruy Lopez"]
[Variation "open, Bernstein variation"]

e4 e5 Nf3 Nc6 Bb5 a6 Ba4 Nf6 O-O Nxe4 d4 b5 Bb3 d5 dxe5 Be6 Nbd2 *

[ECO "C80"]
[Opening "Ruy Lopez"]
[Variation "open, Bernstein variation, Karpov gambit"]

e4 e5 Nf3 Nc6 Bb5 a6 Ba4 Nf6 O-O Nxe4 d4 b5 Bb3 d5 dxe5 Be6 Nbd2 Nc5 c3 d4 Ng5 *

[ECO "C81"]
[Opening "Ruy Lopez"]
[Variation "open, Howell attack"]

e4 e5 Nf3 Nc6 Bb5 a6 Ba4 Nf6 O-O Nxe4 d4 b5 Bb3 d5 dxe5 Be6 Qe2 *

[ECO "C81"]
[Opening "Ruy Lopez"]
[Variation "open, Howell attack, Ekström variation"]

e4 e5 Nf3 Nc6 Bb5 a6 Ba4 Nf6 O-O Nxe4 d4 b5 Bb3 d5 dxe5 Be6 Qe2 Be7 Rd1 O-O c4 bxc4 Bxc4 Qd7 *

[ECO "C81"]
[Opening "Ruy Lopez"]
[Variation "open, Howell attack, Adam variation"]

e4 e5 Nf3 Nc6 Bb5 a6 Ba4 Nf6 O-O Nxe4 d4 b5 Bb3 d5 dxe5 Be6 Qe2 Be7 c4 *

[ECO "C82"]
[Opening "Ruy Lopez"]
[Variation "open, 9.c3"]

e4 e5 Nf3 Nc6 Bb5 a6 Ba4 Nf6 O-O Nxe4 d4 b5 Bb3 d5 dxe5 Be6 c3 *

[ECO "C82"]
[Opening "Ruy Lopez"]
[Variation "open, Berlin variation"]

e4 e5 Nf3 Nc6 Bb5 a6 Ba4 Nf6 O-O Nxe4 d4 b5 Bb3 d5 dxe5 Be6 c3 Nc5 *

[ECO "C82"]
[Opening "Ruy Lopez"]
[Variation "open, Italian variation"]

e4 e5 Nf3 Nc6 Bb5 a6 Ba4 Nf6 O-O Nxe4 d4 b5 Bb3 d5 dxe5 Be6 c3 Bc5 *

[ECO "C82"]
[Opening "Ruy Lopez"]
[Variation "open, St. Petersburg variation"]

e4 e5 Nf3 Nc6 Bb5 a6 Ba4 Nf6 O-O Nxe4 d4 b5 Bb3 d5 dxe5 Be6 c3 Bc5 Nbd2 *

[ECO "C82"]
[Opening "Ruy Lopez"]
[Variation "open, Dilworth variation"]

e4 e5 Nf3 Nc6 Bb5 a6 Ba4 Nf6 O-O Nxe4 d4 b5 Bb3 d5 dxe5 Be6 c3 Bc5 Nbd2 O-O Bc2 Nxf2 *

[ECO "C82"]
[Opening "Ruy Lopez"]
[Variation "open, Motzko attack"]

e4 e5 Nf3 Nc6 Bb5 a6 Ba4 Nf6 O-O Nxe4 d4 b5 Bb3 d5 dxe5 Be6 c3 Bc5 Qd3 *

[ECO "C82"]
[Opening "Ruy Lopez"]
[Variation "open, Motzko attack, Nenarokov variation"]

e4 e5 Nf3 Nc6 Bb5 a6 Ba4 Nf6 O-O Nxe4 d4 b5 Bb3 d5 dxe5 Be6 c3 Bc5 Qd3 Ne7 *

[ECO "C83"]
[Opening "Ruy Lopez"]
[Variation "open, classical defence"]

e4 e5 Nf3 Nc6 Bb5 a6 Ba4 Nf6 O-O Nxe4 d4 b5 Bb3 d5 dxe5 Be6 c3 Be7 *

[ECO "C83"]
[Opening "Ruy Lopez"]
[Variation "open, Malkin variation"]

e4 e5 Nf3 Nc6 Bb5 a6 Ba4 Nf6 O-O Nxe4 d4 b5 Bb3 d5 dxe5 Be6 c3 Be7 Nbd2 O-O Qe2 *

[ECO "C83"]
[Opening "Ruy Lopez"]
[Variation "open, 9...Be7, 10.Re1"]

e4 e5 Nf3 Nc6 Bb5 a6 Ba4 Nf6 O-O Nxe4 d4 b5 Bb3 d5 dxe5 Be6 c3 Be7 Re1 *

[ECO "C83"]
[Opening "Ruy Lopez"]
[Variation "open, Tarrasch trap"]

e4 e5 Nf3 Nc6 Bb5 a6 Ba4 Nf6 O-O Nxe4 d4 b5 Bb3 d5 dxe5 Be6 c3 Be7 Re1 O-O Nd4 Qd7 Nxe6 fxe6 Rxe4 *

[ECO "C83"]
[Opening "Ruy Lopez"]
[Variation "open, Breslau variation"]

e4 e5 Nf3 Nc6 Bb5 a6 Ba4 Nf6 O-O Nxe4 d4 b5 Bb3 d5 dxe5 Be6 c3 Be7 Re1 O-O Nd4 Nxe5 *

[ECO "C84"]
[Opening "Ruy Lopez"]
[Variation "closed defence"]

e4 e5 Nf3 Nc6 Bb5 a6 Ba4 Nf6 O-O Be7 *

[ECO "C84"]
[Opening "Ruy Lopez"]
[Variation "closed, centre attack"]

e4 e5 Nf3 Nc6 Bb5 a6 Ba4 Nf6 O-O Be7 d4 *

[ECO "C84"]
[Opening "Ruy Lopez"]
[Variation "closed, Basque gambit (North Spanish variation)"]

e4 e5 Nf3 Nc6 Bb5 a6 Ba4 Nf6 O-O Be7 d4 exd4 e5 Ne4 c3 *

[ECO "C85"]
[Opening "Ruy Lopez"]
[Variation "Exchange variation doubly deferred (DERLD)"]

e4 e5 Nf3 Nc6 Bb5 a6 Ba4 Nf6 O-O Be7 Bxc6 *

[ECO "C86"]
[Opening "Ruy Lopez"]
[Variation "Worrall attack"]

e4 e5 Nf3 Nc6 Bb5 a6 Ba4 Nf6 O-O Be7 Qe2 *

[ECO "C86"]
[Opening "Ruy Lopez"]
[Variation "Worrall attack, sharp line"]

e4 e5 Nf3 Nc6 Bb5 a6 Ba4 Nf6 O-O Be7 Qe2 b5 Bb3 O-O *

[ECO "C86"]
[Opening "Ruy Lopez"]
[Variation "Worrall attack, solid line"]

e4 e5 Nf3 Nc6 Bb5 a6 Ba4 Nf6 O-O Be7 Qe2 b5 Bb3 d6 *

[ECO "C87"]
[Opening "Ruy Lopez"]
[Variation "closed, Averbach variation"]

e4 e5 Nf3 Nc6 Bb5 a6 Ba4 Nf6 O-O Be7 Re1 d6 *

[ECO "C88"]
[Opening "Ruy Lopez"]
[Variation "closed"]

e4 e5 Nf3 Nc6 Bb5 a6 Ba4 Nf6 O-O Be7 Re1 b5 Bb3 *

[ECO "C88"]
[Opening "Ruy Lopez"]
[Variation "closed, Leonhardt variation"]

e4 e5 Nf3 Nc6 Bb5 a6 Ba4 Nf6 O-O Be7 Re1 b5 Bb3 d6 c3 Na5 Bc2 c5 d4 Qc7 h3 Nc6 d5 Nb8 Nbd2 g5 *

[ECO "C88"]
[Opening "Ruy Lopez"]
[Variation "closed, Balla variation"]

e4 e5 Nf3 Nc6 Bb5 a6 Ba4 Nf6 O-O Be7 Re1 b5 Bb3 d6 c3 Na5 Bc2 c5 d4 Qc7 a4 *

[ECO "C88"]
[Opening "Ruy Lopez"]
[Variation "closed, 7...d6, 8.d4"]

e4 e5 Nf3 Nc6 Bb5 a6 Ba4 Nf6 O-O Be7 Re1 b5 Bb3 d6 d4 *

[ECO "C88"]
[Opening "Ruy Lopez"]
[Variation "Noah's ark trap"]

e4 e5 Nf3 Nc6 Bb5 a6 Ba4 Nf6 O-O Be7 Re1 b5 Bb3 d6 d4 Nxd4 Nxd4 exd4 Qxd4 c5 *

[ECO "C88"]
[Opening "Ruy Lopez"]
[Variation "Trajkovic counter-attack"]

e4 e5 Nf3 Nc6 Bb5 a6 Ba4 Nf6 O-O Be7 Re1 b5 Bb3 Bb7 *

[ECO "C88"]
[Opening "Ruy Lopez"]
[Variation "closed, 7...O-O"]

e4 e5 Nf3 Nc6 Bb5 a6 Ba4 Nf6 O-O Be7 Re1 b5 Bb3 O-O *

[ECO "C88"]
[Opening "Ruy Lopez"]
[Variation "closed, anti-Marshall 8.a4"]

e4 e5 Nf3 Nc6 Bb5 a6 Ba4 Nf6 O-O Be7 Re1 b5 Bb3 O-O a4 *

[ECO "C88"]
[Opening "Ruy Lopez"]
[Variation "closed, 8.c3"]

e4 e5 Nf3 Nc6 Bb5 a6 Ba4 Nf6 O-O Be7 Re1 b5 Bb3 O-O c3 *

[ECO "C89"]
[Opening "Ruy Lopez"]
[Variation "Marshall counter-attack"]

e4 e5 Nf3 Nc6 Bb5 a6 Ba4 Nf6 O-O Be7 Re1 b5 Bb3 O-O c3 d5 *

[ECO "C89"]
[Opening "Ruy Lopez"]
[Variation "Marshall counter-attack, 11...c6"]

e4 e5 Nf3 Nc6 Bb5 a6 Ba4 Nf6 O-O Be7 Re1 b5 Bb3 O-O c3 d5 exd5 Nxd5 Nxe5 Nxe5 Rxe5 c6 *

[ECO "C89"]
[Opening "Ruy Lopez"]
[Variation "Marshall, Kevitz variation"]

e4 e5 Nf3 Nc6 Bb5 a6 Ba4 Nf6 O-O Be7 Re1 b5 Bb3 O-O c3 d5 exd5 Nxd5 Nxe5 Nxe5 Rxe5 c6 Bxd5 cxd5 d4 Bd6 Re3 *

[ECO "C89"]
[Opening "Ruy Lopez"]
[Variation "Marshall, main line, 12.d2d4"]

e4 e5 Nf3 Nc6 Bb5 a6 Ba4 Nf6 O-O Be7 Re1 b5 Bb3 O-O c3 d5 exd5 Nxd5 Nxe5 Nxe5 Rxe5 c6 d4 *

[ECO "C89"]
[Opening "Ruy Lopez"]
[Variation "Marshall, main line, 14...Qh3"]

e4 e5 Nf3 Nc6 Bb5 a6 Ba4 Nf6 O-O Be7 Re1 b5 Bb3 O-O c3 d5 exd5 Nxd5 Nxe5 Nxe5 Rxe5 c6 d4 Bd6 Re1 Qh4 g3 Qh3 *

[ECO "C89"]
[Opening "Ruy Lopez"]
[Variation "Marshall, main line, Spassky variation"]

e4 e5 Nf3 Nc6 Bb5 a6 Ba4 Nf6 O-O Be7 Re1 b5 Bb3 O-O c3 d5 exd5 Nxd5 Nxe5 Nxe5 Rxe5 c6 d4 Bd6 Re1 Qh4 g3 Qh3 Be3 Bg4 Qd3 Rae8 Nd2 Re6 a4 Qh5 *

[ECO "C89"]
[Opening "Ruy Lopez"]
[Variation "Marshall, Herman Steiner variation"]

e4 e5 Nf3 Nc6 Bb5 a6 Ba4 Nf6 O-O Be7 Re1 b5 Bb3 O-O c3 d5 exd5 e4 *

[ECO "C90"]
[Opening "Ruy Lopez"]
[Variation "closed (with ...d6)"]

e4 e5 Nf3 Nc6 Bb5 a6 Ba4 Nf6 O-O Be7 Re1 b5 Bb3 O-O c3 d6 *

[ECO "C90"]
[Opening "Ruy Lopez"]
[Variation "closed, Pilnik variation"]

e4 e5 Nf3 Nc6 Bb5 a6 Ba4 Nf6 O-O Be7 Re1 b5 Bb3 O-O c3 d6 d3 *

[ECO "C90"]
[Opening "Ruy Lopez"]
[Variation "closed, Lutikov variation"]

e4 e5 Nf3 Nc6 Bb5 a6 Ba4 Nf6 O-O Be7 Re1 b5 Bb3 O-O c3 d6 Bc2 *

[ECO "C90"]
[Opening "Ruy Lopez"]
[Variation "closed, Suetin variation"]

e4 e5 Nf3 Nc6 Bb5 a6 Ba4 Nf6 O-O Be7 Re1 b5 Bb3 O-O c3 d6 a3 *

[ECO "C91"]
[Opening "Ruy Lopez"]
[Variation "closed, 9.d4"]

e4 e5 Nf3 Nc6 Bb5 a6 Ba4 Nf6 O-O Be7 Re1 b5 Bb3 O-O c3 d6 d4 *

[ECO "C91"]
[Opening "Ruy Lopez"]
[Variation "closed, Bogolyubov variation"]

e4 e5 Nf3 Nc6 Bb5 a6 Ba4 Nf6 O-O Be7 Re1 b5 Bb3 O-O c3 d6 d4 Bg4 *

[ECO "C92"]
[Opening "Ruy Lopez"]
[Variation "closed, 9.h3"]

e4 e5 Nf3 Nc6 Bb5 a6 Ba4 Nf6 O-O Be7 Re1 b5 Bb3 O-O c3 d6 h3 *

[ECO "C92"]
[Opening "Ruy Lopez"]
[Variation "closed, Keres (9...a5) variation"]

e4 e5 Nf3 Nc6 Bb5 a6 Ba4 Nf6 O-O Be7 Re1 b5 Bb3 O-O c3 d6 h3 a5 *

[ECO "C92"]
[Opening "Ruy Lopez"]
[Variation "closed, Kholmov variation"]

e4 e5 Nf3 Nc6 Bb5 a6 Ba4 Nf6 O-O Be7 Re1 b5 Bb3 O-O c3 d6 h3 Be6 *

[ECO "C92"]
[Opening "Ruy Lopez"]
[Variation "closed, Ragozin-Petrosian (`Keres') variation"]

e4 e5 Nf3 Nc6 Bb5 a6 Ba4 Nf6 O-O Be7 Re1 b5 Bb3 O-O c3 d6 h3 Nd7 *

[ECO "C92"]
[Opening "Ruy Lopez"]
[Variation "closed, Flohr-Zaitsev system (Lenzerheide variation)"]

e4 e5 Nf3 Nc6 Bb5 a6 Ba4 Nf6 O-O Be7 Re1 b5 Bb3 O-O c3 d6 h3 Bb7 *

[ECO "C93"]
[Opening "Ruy Lopez"]
[Variation "closed, Smyslov defence"]

e4 e5 Nf3 Nc6 Bb5 a6 Ba4 Nf6 O-O Be7 Re1 b5 Bb3 O-O c3 d6 h3 h6 *

[ECO "C94"]
[Opening "Ruy Lopez"]
[Variation "closed, Breyer defence"]

e4 e5 Nf3 Nc6 Bb5 a6 Ba4 Nf6 O-O Be7 Re1 b5 Bb3 O-O c3 d6 h3 Nb8 *

[ECO "C95"]
[Opening "Ruy Lopez"]
[Variation "closed, Breyer, 10.d4"]

e4 e5 Nf3 Nc6 Bb5 a6 Ba4 Nf6 O-O Be7 Re1 b5 Bb3 O-O c3 d6 h3 Nb8 d4 *

[ECO "C95"]
[Opening "Ruy Lopez"]
[Variation "closed, Breyer, Borisenko variation"]

e4 e5 Nf3 Nc6 Bb5 a6 Ba4 Nf6 O-O Be7 Re1 b5 Bb3 O-O c3 d6 h3 Nb8 d4 Nbd7 *

[ECO "C95"]
[Opening "Ruy Lopez"]
[Variation "closed, Breyer, Gligoric variation"]

e4 e5 Nf3 Nc6 Bb5 a6 Ba4 Nf6 O-O Be7 Re1 b5 Bb3 O-O c3 d6 h3 Nb8 d4 Nbd7 Nbd2 Bb7 Bc2 c5 *

[ECO "C95"]
[Opening "Ruy Lopez"]
[Variation "closed, Breyer, Simagin variation"]

e4 e5 Nf3 Nc6 Bb5 a6 Ba4 Nf6 O-O Be7 Re1 b5 Bb3 O-O c3 d6 h3 Nb8 d4 Nbd7 Nh4 *

[ECO "C96"]
[Opening "Ruy Lopez"]
[Variation "closed (8...Na5)"]

e4 e5 Nf3 Nc6 Bb5 a6 Ba4 Nf6 O-O Be7 Re1 b5 Bb3 O-O c3 d6 h3 Na5 Bc2 *

[ECO "C96"]
[Opening "Ruy Lopez"]
[Variation "closed, Rossolimo defence"]

e4 e5 Nf3 Nc6 Bb5 a6 Ba4 Nf6 O-O Be7 Re1 b5 Bb3 O-O c3 d6 h3 Na5 Bc2 c6 d4 Qc7 *

[ECO "C96"]
[Opening "Ruy Lopez"]
[Variation "closed (10...c5)"]

e4 e5 Nf3 Nc6 Bb5 a6 Ba4 Nf6 O-O Be7 Re1 b5 Bb3 O-O c3 d6 h3 Na5 Bc2 c5 *

[ECO "C96"]
[Opening "Ruy Lopez"]
[Variation "closed, Borisenko defence"]

e4 e5 Nf3 Nc6 Bb5 a6 Ba4 Nf6 O-O Be7 Re1 b5 Bb3 O-O c3 d6 h3 Na5 Bc2 c5 d4 Nc6 *

[ECO "C96"]
[Opening "Ruy Lopez"]
[Variation "closed, Keres (...Nd7) defence"]

e4 e5 Nf3 Nc6 Bb5 a6 Ba4 Nf6 O-O Be7 Re1 b5 Bb3 O-O c3 d6 h3 Na5 Bc2 c5 d4 Nd7 *

[ECO "C97"]
[Opening "Ruy Lopez"]
[Variation "closed, Chigorin defence"]

e4 e5 Nf3 Nc6 Bb5 a6 Ba4 Nf6 O-O Be7 Re1 b5 Bb3 O-O c3 d6 h3 Na5 Bc2 c5 d4 Qc7 *

[ECO "C97"]
[Opening "Ruy Lopez"]
[Variation "closed, Chigorin, Yugoslav system"]

e4 e5 Nf3 Nc6 Bb5 a6 Ba4 Nf6 O-O Be7 Re1 b5 Bb3 O-O c3 d6 h3 Na5 Bc2 c5 d4 Qc7 Nbd2 Bd7 Nf1 Rfe8 Ne3 g6 *

[ECO "C98"]
[Opening "Ruy Lopez"]
[Variation "closed, Chigorin, 12...Nc6"]

e4 e5 Nf3 Nc6 Bb5 a6 Ba4 Nf6 O-O Be7 Re1 b5 Bb3 O-O c3 d6 h3 Na5 Bc2 c5 d4 Qc7 Nbd2 Nc6 *

[ECO "C98"]
[Opening "Ruy Lopez"]
[Variation "closed, Chigorin, Rauzer attack"]

e4 e5 Nf3 Nc6 Bb5 a6 Ba4 Nf6 O-O Be7 Re1 b5 Bb3 O-O c3 d6 h3 Na5 Bc2 c5 d4 Qc7 Nbd2 Nc6 dxc5 *

[ECO "C99"]
[Opening "Ruy Lopez"]
[Variation "closed, Chigorin, 12...c5d4"]

e4 e5 Nf3 Nc6 Bb5 a6 Ba4 Nf6 O-O Be7 Re1 b5 Bb3 O-O c3 d6 h3 Na5 Bc2 c5 d4 Qc7 Nbd2 cxd4 cxd4 *

[ECO "D00"]
[Opening "Queen's pawn game"]

d4 d5 *

[ECO "D00"]
[Opening "Queen's pawn, Mason variation"]

d4 d5 Bf4 *

[ECO "D00"]
[Opening "Queen's pawn, Mason variation, Steinitz counter-gambit"]

d4 d5 Bf4 c5 *

[ECO "D00"]
[Opening "Levitsky attack (Queen's bishop attack)"]

d4 d5 Bg5 *

[ECO "D00"]
[Opening "Blackmar gambit"]

d4 d5 e4 *

[ECO "D00"]
[Opening "Queen's pawn"]
[Variation "stonewall attack"]

d4 d5 e3 Nf6 Bd3 *

[ECO "D00"]
[Opening "Queen's pawn"]
[Variation "Chigorin variation"]

d4 d5 Nc3 *

[ECO "D00"]
[Opening "Queen's pawn"]
[Variation "Anti-Veresov"]

d4 d5 Nc3 Bg4 *

[ECO "D00"]
[Opening "Blackmar-Diemer gambit"]

d4 d5 Nc3 Nf6 e4 *

[ECO "D00"]
[Opening "Blackmar-Diemer"]
[Variation "Euwe defence"]

d4 d5 Nc3 Nf6 e4 dxe4 f3 exf3 Nxf3 e6 *

[ECO "D00"]
[Opening "Blackmar-Diemer"]
[Variation "Lemberg counter-gambit"]

d4 d5 Nc3 Nf6 e4 e5 *

[ECO "D01"]
[Opening "Richter-Veresov attack"]

d4 d5 Nc3 Nf6 Bg5 *

[ECO "D01"]
[Opening "Richter-Veresov attack, Veresov variation"]

d4 d5 Nc3 Nf6 Bg5 Bf5 Bxf6 *

[ECO "D01"]
[Opening "Richter-Veresov attack, Richter variation"]

d4 d5 Nc3 Nf6 Bg5 Bf5 f3 *

[ECO "D02"]
[Opening "Queen's pawn game"]

d4 d5 Nf3 *

[ECO "D02"]
[Opening "Queen's pawn game, Chigorin variation"]

d4 d5 Nf3 Nc6 *

[ECO "D02"]
[Opening "Queen's pawn game, Krause variation"]

d4 d5 Nf3 c5 *

[ECO "D02"]
[Opening "Queen's pawn game"]

d4 d5 Nf3 Nf6 *

[ECO "D02"]
[Opening "Queen's bishop game"]

d4 d5 Nf3 Nf6 Bf4 *

[ECO "D03"]
[Opening "Torre attack (Tartakower variation)"]

d4 d5 Nf3 Nf6 Bg5 *

[ECO "D04"]
[Opening "Queen's pawn game"]

d4 d5 Nf3 Nf6 e3 *

[ECO "D05"]
[Opening "Queen's pawn game"]

d4 d5 Nf3 Nf6 e3 e6 *

[ECO "D05"]
[Opening "Queen's pawn game, Zukertort variation"]

d4 d5 Nf3 Nf6 e3 e6 Nbd2 c5 b3 *

[ECO "D05"]
[Opening "Queen's pawn game"]

d4 d5 Nf3 Nf6 e3 e6 Bd3 *

[ECO "D05"]
[Opening "Queen's pawn game, Rubinstein (Colle-Zukertort) variation"]

d4 d5 Nf3 Nf6 e3 e6 Bd3 c5 b3 *

[ECO "D05"]
[Opening "Colle system"]

d4 d5 Nf3 Nf6 e3 e6 Bd3 c5 c3 *

[ECO "D06"]
[Opening "Queen's Gambit"]

d4 d5 c4 *

[ECO "D06"]
[Opening "QGD"]
[Variation "Grau (Sahovic) defence"]

d4 d5 c4 Bf5 *

[ECO "D06"]
[Opening "QGD"]
[Variation "Marshall defence"]

d4 d5 c4 Nf6 *

[ECO "D06"]
[Opening "QGD"]
[Variation "symmetrical (Austrian) defence"]

d4 d5 c4 c5 *

[ECO "D07"]
[Opening "QGD"]
[Variation "Chigorin defence"]

d4 d5 c4 Nc6 *

[ECO "D07"]
[Opening "QGD"]
[Variation "Chigorin defence, Janowski variation"]

d4 d5 c4 Nc6 Nc3 dxc4 Nf3 *

[ECO "D08"]
[Opening "QGD"]
[Variation "Albin counter-gambit"]

d4 d5 c4 e5 *

[ECO "D08"]
[Opening "QGD"]
[Variation "Albin counter-gambit, Lasker trap"]

d4 d5 c4 e5 dxe5 d4 e3 Bb4+ Bd2 dxe3 *

[ECO "D08"]
[Opening "QGD"]
[Variation "Albin counter-gambit"]

d4 d5 c4 e5 dxe5 d4 Nf3 *

[ECO "D08"]
[Opening "QGD"]
[Variation "Albin counter-gambit, Alapin variation"]

d4 d5 c4 e5 dxe5 d4 Nf3 Nc6 Nbd2 *

[ECO "D08"]
[Opening "QGD"]
[Variation "Albin counter-gambit, Krenosz variation"]

d4 d5 c4 e5 dxe5 d4 Nf3 Nc6 Nbd2 Bg4 h3 Bxf3 Nxf3 Bb4+ Bd2 Qe7 *

[ECO "D08"]
[Opening "QGD"]
[Variation "Albin counter-gambit, Janowski variation"]

d4 d5 c4 e5 dxe5 d4 Nf3 Nc6 Nbd2 f6 *

[ECO "D08"]
[Opening "QGD"]
[Variation "Albin counter-gambit, Balogh variation"]

d4 d5 c4 e5 dxe5 d4 Nf3 Nc6 Nbd2 Qe7 *

[ECO "D09"]
[Opening "QGD"]
[Variation "Albin counter-gambit, 5.g3"]

d4 d5 c4 e5 dxe5 d4 Nf3 Nc6 g3 *

[ECO "D10"]
[Opening "QGD Slav defence"]

d4 d5 c4 c6 *

[ECO "D10"]
[Opening "QGD Slav defence, Alekhine variation"]

d4 d5 c4 c6 Nc3 dxc4 e4 *

[ECO "D10"]
[Opening "QGD Slav"]
[Variation "Winawer counter-gambit"]

d4 d5 c4 c6 Nc3 e5 *

[ECO "D10"]
[Opening "QGD Slav defence"]
[Variation "exchange variation"]

d4 d5 c4 c6 cxd5 *

[ECO "D11"]
[Opening "QGD Slav"]
[Variation "3.Nf3"]

d4 d5 c4 c6 Nf3 *

[ECO "D11"]
[Opening "QGD Slav"]
[Variation "Breyer variation"]

d4 d5 c4 c6 Nf3 Nf6 Nbd2 *

[ECO "D11"]
[Opening "QGD Slav"]
[Variation "4.e3"]

d4 d5 c4 c6 Nf3 Nf6 e3 *

[ECO "D12"]
[Opening "QGD Slav"]
[Variation "4.e3 Bf5"]

d4 d5 c4 c6 Nf3 Nf6 e3 Bf5 *

[ECO "D12"]
[Opening "QGD Slav"]
[Variation "Landau variation"]

d4 d5 c4 c6 Nf3 Nf6 e3 Bf5 cxd5 cxd5 Qb3 Qc8 Bd2 e6 Na3 *

[ECO "D12"]
[Opening "QGD Slav"]
[Variation "exchange variation"]

d4 d5 c4 c6 Nf3 Nf6 e3 Bf5 cxd5 cxd5 Nc3 *

[ECO "D12"]
[Opening "QGD Slav"]
[Variation "Amsterdam variation"]

d4 d5 c4 c6 Nf3 Nf6 e3 Bf5 cxd5 cxd5 Nc3 e6 Ne5 Nfd7 *

[ECO "D13"]
[Opening "QGD Slav"]
[Variation "exchange variation"]

d4 d5 c4 c6 Nf3 Nf6 cxd5 cxd5 *

[ECO "D14"]
[Opening "QGD Slav"]
[Variation "exchange variation, 6.Bf4 Bf5"]

d4 d5 c4 c6 Nf3 Nf6 cxd5 cxd5 Nc3 Nc6 Bf4 Bf5 *

[ECO "D14"]
[Opening "QGD Slav"]
[Variation "exchange, Trifunovic variation"]

d4 d5 c4 c6 Nf3 Nf6 cxd5 cxd5 Nc3 Nc6 Bf4 Bf5 e3 e6 Qb3 Bb4 *

[ECO "D15"]
[Opening "QGD Slav"]
[Variation "4.Nc3"]

d4 d5 c4 c6 Nf3 Nf6 Nc3 *

[ECO "D15"]
[Opening "QGD Slav"]
[Variation "Suechting variation"]

d4 d5 c4 c6 Nf3 Nf6 Nc3 Qb6 *

[ECO "D15"]
[Opening "QGD Slav"]
[Variation "Schlechter variation"]

d4 d5 c4 c6 Nf3 Nf6 Nc3 g6 *

[ECO "D15"]
[Opening "QGD Slav accepted"]

d4 d5 c4 c6 Nf3 Nf6 Nc3 dxc4 *

[ECO "D15"]
[Opening "QGD Slav"]
[Variation "5.e3 (Alekhine variation)"]

d4 d5 c4 c6 Nf3 Nf6 Nc3 dxc4 e3 *

[ECO "D15"]
[Opening "QGD Slav"]
[Variation "Slav gambit"]

d4 d5 c4 c6 Nf3 Nf6 Nc3 dxc4 e4 *

[ECO "D15"]
[Opening "QGD Slav"]
[Variation "Tolush-Geller gambit"]

d4 d5 c4 c6 Nf3 Nf6 Nc3 dxc4 e4 b5 e5 *

[ECO "D16"]
[Opening "QGD Slav accepted"]
[Variation "Alapin variation"]

d4 d5 c4 c6 Nf3 Nf6 Nc3 dxc4 a4 *

[ECO "D16"]
[Opening "QGD Slav"]
[Variation "Smyslov variation"]

d4 d5 c4 c6 Nf3 Nf6 Nc3 dxc4 a4 Na6 e4 Bg4 *

[ECO "D16"]
[Opening "QGD Slav"]
[Variation "Soultanbeieff variation"]

d4 d5 c4 c6 Nf3 Nf6 Nc3 dxc4 a4 e6 *

[ECO "D16"]
[Opening "QGD Slav"]
[Variation "Steiner variation"]

d4 d5 c4 c6 Nf3 Nf6 Nc3 dxc4 a4 Bg4 *

[ECO "D17"]
[Opening "QGD Slav"]
[Variation "Czech defence"]

d4 d5 c4 c6 Nf3 Nf6 Nc3 dxc4 a4 Bf5 *

[ECO "D17"]
[Opening "QGD Slav"]
[Variation "Krause attack"]

d4 d5 c4 c6 Nf3 Nf6 Nc3 dxc4 a4 Bf5 Ne5 *

[ECO "D17"]
[Opening "QGD Slav"]
[Variation "Carlsbad variation"]

d4 d5 c4 c6 Nf3 Nf6 Nc3 dxc4 a4 Bf5 Ne5 Nbd7 Nxc4 Qc7 g3 e5 *

[ECO "D17"]
[Opening "QGD Slav"]
[Variation "Wiesbaden variation"]

d4 d5 c4 c6 Nf3 Nf6 Nc3 dxc4 a4 Bf5 Ne5 e6 *

[ECO "D18"]
[Opening "QGD Slav"]
[Variation "Dutch variation"]

d4 d5 c4 c6 Nf3 Nf6 Nc3 dxc4 a4 Bf5 e3 *

[ECO "D18"]
[Opening "QGD Slav"]
[Variation "Dutch, Lasker variation"]

d4 d5 c4 c6 Nf3 Nf6 Nc3 dxc4 a4 Bf5 e3 Na6 *

[ECO "D19"]
[Opening "QGD Slav"]
[Variation "Dutch variation"]

d4 d5 c4 c6 Nf3 Nf6 Nc3 dxc4 a4 Bf5 e3 e6 Bxc4 Bb4 O-O *

[ECO "D19"]
[Opening "QGD Slav"]
[Variation "Dutch variation, main line"]

d4 d5 c4 c6 Nf3 Nf6 Nc3 dxc4 a4 Bf5 e3 e6 Bxc4 Bb4 O-O O-O Qe2 *

[ECO "D19"]
[Opening "QGD Slav"]
[Variation "Dutch, Sämisch variation"]

d4 d5 c4 c6 Nf3 Nf6 Nc3 dxc4 a4 Bf5 e3 e6 Bxc4 Bb4 O-O O-O Qe2 Ne4 g4 *

[ECO "D20"]
[Opening "Queen's gambit accepted"]

d4 d5 c4 dxc4 *

[ECO "D20"]
[Opening "QGA"]
[Variation "3.e4"]

d4 d5 c4 dxc4 e4 *

[ECO "D20"]
[Opening "QGA"]
[Variation "Linares variation"]

d4 d5 c4 dxc4 e4 c5 d5 Nf6 Nc3 b5 *

[ECO "D20"]
[Opening "QGA"]
[Variation "Schwartz defence"]

d4 d5 c4 dxc4 e4 f5 *

[ECO "D21"]
[Opening "QGA"]
[Variation "3.Nf3"]

d4 d5 c4 dxc4 Nf3 *

[ECO "D21"]
[Opening "QGA"]
[Variation "Ericson variation"]

d4 d5 c4 dxc4 Nf3 b5 *

[ECO "D21"]
[Opening "QGA"]
[Variation "Alekhine defence, Borisenko-Furman variation"]

d4 d5 c4 dxc4 Nf3 a6 e4 *

[ECO "D22"]
[Opening "QGA"]
[Variation "Alekhine defence"]

d4 d5 c4 dxc4 Nf3 a6 *

[ECO "D22"]
[Opening "QGA"]
[Variation "Alekhine defence, Alatortsev variation"]

d4 d5 c4 dxc4 Nf3 a6 e3 Bg4 Bxc4 e6 d5 *

[ECO "D22"]
[Opening "QGA"]
[Variation "Haberditz variation"]

d4 d5 c4 dxc4 Nf3 a6 e3 b5 *

[ECO "D23"]
[Opening "Queen's gambit accepted"]

d4 d5 c4 dxc4 Nf3 Nf6 *

[ECO "D23"]
[Opening "QGA"]
[Variation "Mannheim variation"]

d4 d5 c4 dxc4 Nf3 Nf6 Qa4+ *

[ECO "D24"]
[Opening "QGA, 4.Nc3"]

d4 d5 c4 dxc4 Nf3 Nf6 Nc3 *

[ECO "D24"]
[Opening "QGA, Bogolyubov variation"]

d4 d5 c4 dxc4 Nf3 Nf6 Nc3 a6 e4 *

[ECO "D25"]
[Opening "QGA, 4.e3"]

d4 d5 c4 dxc4 Nf3 Nf6 e3 *

[ECO "D25"]
[Opening "QGA, Smyslov variation"]

d4 d5 c4 dxc4 Nf3 Nf6 e3 g6 *

[ECO "D25"]
[Opening "QGA, Janowsky-Larsen variation"]

d4 d5 c4 dxc4 Nf3 Nf6 e3 Bg4 *

[ECO "D25"]
[Opening "QGA, Flohr variation"]

d4 d5 c4 dxc4 Nf3 Nf6 e3 Be6 *

[ECO "D26"]
[Opening "QGA"]
[Variation "4...e6"]

d4 d5 c4 dxc4 Nf3 Nf6 e3 e6 *

[ECO "D26"]
[Opening "QGA"]
[Variation "classical variation"]

d4 d5 c4 dxc4 Nf3 Nf6 e3 e6 Bxc4 c5 *

[ECO "D26"]
[Opening "QGA"]
[Variation "classical, Furman variation"]

d4 d5 c4 dxc4 Nf3 Nf6 e3 e6 Bxc4 c5 Qe2 a6 dxc5 Bxc5 O-O Nc6 e4 b5 e5 *

[ECO "D26"]
[Opening "QGA"]
[Variation "classical variation, 6.O-O"]

d4 d5 c4 dxc4 Nf3 Nf6 e3 e6 Bxc4 c5 O-O *

[ECO "D26"]
[Opening "QGA"]
[Variation "classical, Steinitz variation"]

d4 d5 c4 dxc4 Nf3 Nf6 e3 e6 Bxc4 c5 O-O cxd4 *

[ECO "D27"]
[Opening "QGA"]
[Variation "classical, 6...a6"]

d4 d5 c4 dxc4 Nf3 Nf6 e3 e6 Bxc4 c5 O-O a6 *

[ECO "D27"]
[Opening "QGA"]
[Variation "classical, Rubinstein variation"]

d4 d5 c4 dxc4 Nf3 Nf6 e3 e6 Bxc4 c5 O-O a6 a4 *

[ECO "D27"]
[Opening "QGA"]
[Variation "classical, Geller variation"]

d4 d5 c4 dxc4 Nf3 Nf6 e3 e6 Bxc4 c5 O-O a6 e4 *

[ECO "D28"]
[Opening "QGA"]
[Variation "classical, 7.Qe2"]

d4 d5 c4 dxc4 Nf3 Nf6 e3 e6 Bxc4 c5 O-O a6 Qe2 *

[ECO "D28"]
[Opening "QGA"]
[Variation "classical, 7...b5"]

d4 d5 c4 dxc4 Nf3 Nf6 e3 e6 Bxc4 c5 O-O a6 Qe2 b5 *

[ECO "D28"]
[Opening "QGA"]
[Variation "classical, Flohr variation"]

d4 d5 c4 dxc4 Nf3 Nf6 e3 e6 Bxc4 c5 O-O a6 Qe2 b5 Bb3 Nc6 Rd1 c4 Bc2 Nb4 Nc3 Nxc2 Qxc2 Bb7 d5 Qc7 *

[ECO "D29"]
[Opening "QGA"]
[Variation "classical, 8...Bb7"]

d4 d5 c4 dxc4 Nf3 Nf6 e3 e6 Bxc4 c5 O-O a6 Qe2 b5 Bb3 Bb7 *

[ECO "D29"]
[Opening "QGA"]
[Variation "classical, Smyslov variation"]

d4 d5 c4 dxc4 Nf3 Nf6 e3 e6 Bxc4 c5 O-O a6 Qe2 b5 Bb3 Bb7 Rd1 Nbd7 Nc3 Bd6 *

[ECO "D30"]
[Opening "Queen's gambit declined"]

d4 d5 c4 e6 *

[ECO "D30"]
[Opening "QGD Slav"]

d4 d5 c4 e6 Nf3 Nf6 e3 c6 Nbd2 *

[ECO "D30"]
[Opening "QGD"]
[Variation "Stonewall variation"]

d4 d5 c4 e6 Nf3 Nf6 e3 c6 Nbd2 Ne4 Bd3 f5 *

[ECO "D30"]
[Opening "QGD Slav"]

d4 d5 c4 e6 Nf3 Nf6 e3 c6 Nbd2 Nbd7 *

[ECO "D30"]
[Opening "QGD Slav"]
[Variation "Semmering variation"]

d4 d5 c4 e6 Nf3 Nf6 e3 c6 Nbd2 Nbd7 Bd3 c5 *

[ECO "D30"]
[Opening "QGD"]
[Variation "Spielmann variation"]

d4 d5 c4 e6 Nf3 Nf6 e3 c6 Nbd2 g6 *

[ECO "D30"]
[Opening "QGD"]

d4 d5 c4 e6 Nf3 Nf6 Bg5 *

[ECO "D30"]
[Opening "QGD"]
[Variation "Capablanca variation"]

d4 d5 c4 e6 Nf3 Nf6 Bg5 Nbd7 e3 c6 Nbd2 *

[ECO "D30"]
[Opening "QGD"]
[Variation "Vienna variation"]

d4 d5 c4 e6 Nf3 Nf6 Bg5 Bb4+ *

[ECO "D30"]
[Opening "QGD"]
[Variation "Capablanca-Duras variation"]

d4 d5 c4 e6 Nf3 Nf6 Bg5 h6 *

[ECO "D30"]
[Opening "QGD"]
[Variation "Hastings variation"]

d4 d5 c4 e6 Nf3 Nf6 Bg5 h6 Bxf6 Qxf6 Nc3 c6 Qb3 *

[ECO "D31"]
[Opening "QGD"]
[Variation "3.Nc3"]

d4 d5 c4 e6 Nc3 *

[ECO "D31"]
[Opening "QGD"]
[Variation "Janowski variation"]

d4 d5 c4 e6 Nc3 a6 *

[ECO "D31"]
[Opening "QGD"]
[Variation "Alapin variation"]

d4 d5 c4 e6 Nc3 b6 *

[ECO "D31"]
[Opening "QGD"]
[Variation "Charousek (Petrosian) variation"]

d4 d5 c4 e6 Nc3 Be7 *

[ECO "D31"]
[Opening "QGD"]
[Variation "semi-Slav"]

d4 d5 c4 e6 Nc3 c6 *

[ECO "D31"]
[Opening "QGD"]
[Variation "semi-Slav, Noteboom variation"]

d4 d5 c4 e6 Nc3 c6 Nf3 dxc4 *

[ECO "D31"]
[Opening "QGD"]
[Variation "semi-Slav, Koomen variation"]

d4 d5 c4 e6 Nc3 c6 Nf3 dxc4 a4 Bb4 e3 b5 Bd2 Qe7 *

[ECO "D31"]
[Opening "QGD"]
[Variation "semi-Slav, Junge variation"]

d4 d5 c4 e6 Nc3 c6 Nf3 dxc4 a4 Bb4 e3 b5 Bd2 Qb6 *

[ECO "D31"]
[Opening "QGD"]
[Variation "semi-Slav, Abrahams variation"]

d4 d5 c4 e6 Nc3 c6 Nf3 dxc4 a4 Bb4 e3 b5 Bd2 a5 *

[ECO "D31"]
[Opening "QGD"]
[Variation "semi-Slav, Marshall gambit"]

d4 d5 c4 e6 Nc3 c6 e4 *

[ECO "D32"]
[Opening "QGD"]
[Variation "Tarrasch defence"]

d4 d5 c4 e6 Nc3 c5 *

[ECO "D32"]
[Opening "QGD"]
[Variation "Tarrasch, von Hennig-Schara gambit"]

d4 d5 c4 e6 Nc3 c5 cxd5 cxd4 *

[ECO "D32"]
[Opening "QGD"]
[Variation "Tarrasch defence, 4.cd ed"]

d4 d5 c4 e6 Nc3 c5 cxd5 exd5 *

[ECO "D32"]
[Opening "QGD"]
[Variation "Tarrasch defence, Tarrasch gambit"]

d4 d5 c4 e6 Nc3 c5 cxd5 exd5 dxc5 d4 Na4 b5 *

[ECO "D32"]
[Opening "QGD"]
[Variation "Tarrasch defence, Marshall gambit"]

d4 d5 c4 e6 Nc3 c5 cxd5 exd5 e4 *

[ECO "D32"]
[Opening "QGD"]
[Variation "Tarrasch defence"]

d4 d5 c4 e6 Nc3 c5 cxd5 exd5 Nf3 *

[ECO "D33"]
[Opening "QGD"]
[Variation "Tarrasch, Schlechter-Rubinstein system"]

d4 d5 c4 e6 Nc3 c5 cxd5 exd5 Nf3 Nc6 g3 *

[ECO "D33"]
[Opening "QGD"]
[Variation "Tarrasch, Folkestone (Swedish) variation"]

d4 d5 c4 e6 Nc3 c5 cxd5 exd5 Nf3 Nc6 g3 c4 *

[ECO "D33"]
[Opening "QGD"]
[Variation "Tarrasch, Schlechter-Rubinstein system, Rey Ardid variation"]

d4 d5 c4 e6 Nc3 c5 cxd5 exd5 Nf3 Nc6 g3 c4 e4 *

[ECO "D33"]
[Opening "QGD"]
[Variation "Tarrasch, Prague variation"]

d4 d5 c4 e6 Nc3 c5 cxd5 exd5 Nf3 Nc6 g3 Nf6 *

[ECO "D33"]
[Opening "QGD"]
[Variation "Tarrasch, Wagner variation"]

d4 d5 c4 e6 Nc3 c5 cxd5 exd5 Nf3 Nc6 g3 Nf6 Bg2 Bg4 *

[ECO "D34"]
[Opening "QGD"]
[Variation "Tarrasch, Prague variation, 7...Be7"]

d4 d5 c4 e6 Nc3 c5 cxd5 exd5 Nf3 Nc6 g3 Nf6 Bg2 Be7 *

[ECO "D34"]
[Opening "QGD"]
[Variation "Tarrasch, Prague variation, Normal position"]

d4 d5 c4 e6 Nc3 c5 cxd5 exd5 Nf3 Nc6 g3 Nf6 Bg2 Be7 O-O O-O *

[ECO "D34"]
[Opening "QGD"]
[Variation "Tarrasch, Reti variation"]

d4 d5 c4 e6 Nc3 c5 cxd5 exd5 Nf3 Nc6 g3 Nf6 Bg2 Be7 O-O O-O dxc5 Bxc5 Na4 *

[ECO "D34"]
[Opening "QGD"]
[Variation "Tarrasch, Prague variation, 9.Bg5"]

d4 d5 c4 e6 Nc3 c5 cxd5 exd5 Nf3 Nc6 g3 Nf6 Bg2 Be7 O-O O-O Bg5 *

[ECO "D34"]
[Opening "QGD"]
[Variation "Tarrasch, Bogolyubov variation"]

d4 d5 c4 e6 Nc3 c5 cxd5 exd5 Nf3 Nc6 g3 Nf6 Bg2 Be7 O-O O-O Bg5 Be6 Rc1 c4 *

[ECO "D34"]
[Opening "QGD"]
[Variation "Tarrasch, Stoltz variation"]

d4 d5 c4 e6 Nc3 c5 cxd5 exd5 Nf3 Nc6 g3 Nf6 Bg2 Be7 O-O O-O Bg5 Be6 Rc1 b6 *

[ECO "D35"]
[Opening "QGD"]
[Variation "3...Nf6"]

d4 d5 c4 e6 Nc3 Nf6 *

[ECO "D35"]
[Opening "QGD"]
[Variation "Harrwitz attack"]

d4 d5 c4 e6 Nc3 Nf6 Bf4 *

[ECO "D35"]
[Opening "QGD"]
[Variation "exchange variation"]

d4 d5 c4 e6 Nc3 Nf6 cxd5 *

[ECO "D35"]
[Opening "QGD"]
[Variation "exchange, Sämisch variation"]

d4 d5 c4 e6 Nc3 Nf6 cxd5 exd5 Nf3 Nbd7 Bf4 *

[ECO "D35"]
[Opening "QGD"]
[Variation "exchange, positional line"]

d4 d5 c4 e6 Nc3 Nf6 cxd5 exd5 Bg5 *

[ECO "D35"]
[Opening "QGD"]
[Variation "exchange, chameleon variation"]

d4 d5 c4 e6 Nc3 Nf6 cxd5 exd5 Bg5 Be7 e3 O-O Bd3 Nbd7 Qc2 Re8 Nge2 Nf8 O-O-O *

[ECO "D35"]
[Opening "QGD"]
[Variation "exchange, positional line, 5...c6"]

d4 d5 c4 e6 Nc3 Nf6 cxd5 exd5 Bg5 c6 *

[ECO "D36"]
[Opening "QGD"]
[Variation "exchange, positional line, 6.Qc2"]

d4 d5 c4 e6 Nc3 Nf6 cxd5 exd5 Bg5 c6 Qc2 *

[ECO "D37"]
[Opening "QGD"]
[Variation "4.Nf3"]

d4 d5 c4 e6 Nc3 Nf6 Nf3 *

[ECO "D37"]
[Opening "QGD"]
[Variation "classical variation (5.Bf4)"]

d4 d5 c4 e6 Nc3 Nf6 Nf3 Be7 Bf4 *

[ECO "D38"]
[Opening "QGD"]
[Variation "Ragozin variation"]

d4 d5 c4 e6 Nc3 Nf6 Nf3 Bb4 *

[ECO "D39"]
[Opening "QGD"]
[Variation "Ragozin, Vienna variation"]

d4 d5 c4 e6 Nc3 Nf6 Nf3 Bb4 Bg5 dxc4 *

[ECO "D40"]
[Opening "QGD"]
[Variation "Semi-Tarrasch defence"]

d4 d5 c4 e6 Nc3 Nf6 Nf3 c5 *

[ECO "D40"]
[Opening "QGD"]
[Variation "Semi-Tarrasch, symmetrical variation"]

d4 d5 c4 e6 Nc3 Nf6 Nf3 c5 e3 Nc6 Bd3 Bd6 O-O O-O *

[ECO "D40"]
[Opening "QGD"]
[Variation "Semi-Tarrasch, Levenfish variation"]

d4 d5 c4 e6 Nc3 Nf6 Nf3 c5 e3 Nc6 Bd3 Bd6 O-O O-O Qe2 Qe7 dxc5 Bxc5 e4 *

[ECO "D40"]
[Opening "QGD"]
[Variation "Semi-Tarrasch defence, Pillsbury variation"]

d4 d5 c4 e6 Nc3 Nf6 Nf3 c5 Bg5 *

[ECO "D41"]
[Opening "QGD"]
[Variation "Semi-Tarrasch, 5.cd"]

d4 d5 c4 e6 Nc3 Nf6 Nf3 c5 cxd5 *

[ECO "D41"]
[Opening "QGD"]
[Variation "Semi-Tarrasch, Kmoch variation"]

d4 d5 c4 e6 Nc3 Nf6 Nf3 c5 cxd5 Nxd5 e4 Nxc3 bxc3 cxd4 cxd4 Bb4+ Bd2 Bxd2+ Qxd2 O-O Bb5 *

[ECO "D41"]
[Opening "QGD"]
[Variation "Semi-Tarrasch, San Sebastian variation"]

d4 d5 c4 e6 Nc3 Nf6 Nf3 c5 cxd5 Nxd5 e4 Nxc3 bxc3 cxd4 cxd4 Bb4+ Bd2 Qa5 *

[ECO "D41"]
[Opening "QGD"]
[Variation "Semi-Tarrasch with e3"]

d4 d5 c4 e6 Nc3 Nf6 Nf3 c5 cxd5 Nxd5 e3 *

[ECO "D42"]
[Opening "QGD"]
[Variation "Semi-Tarrasch, 7.Bd3"]

d4 d5 c4 e6 Nc3 Nf6 Nf3 c5 cxd5 Nxd5 e3 Nc6 Bd3 *

[ECO "D43"]
[Opening "QGD semi-Slav"]

d4 d5 c4 e6 Nc3 Nf6 Nf3 c6 *

[ECO "D43"]
[Opening "QGD semi-Slav"]
[Variation "Hastings variation"]

d4 d5 c4 e6 Nc3 Nf6 Nf3 c6 Bg5 h6 Bxf6 Qxf6 Qb3 *

[ECO "D44"]
[Opening "QGD semi-Slav"]
[Variation "5.Bg5 dc"]

d4 d5 c4 e6 Nc3 Nf6 Nf3 c6 Bg5 dxc4 *

[ECO "D44"]
[Opening "QGD semi-Slav"]
[Variation "Botvinnik system (anti-Meran)"]

d4 d5 c4 e6 Nc3 Nf6 Nf3 c6 Bg5 dxc4 e4 *

[ECO "D44"]
[Opening "QGD semi-Slav"]
[Variation "Ekstrom variation"]

d4 d5 c4 e6 Nc3 Nf6 Nf3 c6 Bg5 dxc4 e4 b5 e5 h6 Bh4 g5 exf6 gxh4 Ne5 *

[ECO "D44"]
[Opening "QGD semi-Slav"]
[Variation "anti-Meran gambit"]

d4 d5 c4 e6 Nc3 Nf6 Nf3 c6 Bg5 dxc4 e4 b5 e5 h6 Bh4 g5 Nxg5 *

[ECO "D44"]
[Opening "QGD semi-Slav"]
[Variation "anti-Meran, Lilienthal variation"]

d4 d5 c4 e6 Nc3 Nf6 Nf3 c6 Bg5 dxc4 e4 b5 e5 h6 Bh4 g5 Nxg5 hxg5 Bxg5 Nbd7 g3 *

[ECO "D44"]
[Opening "QGD semi-Slav"]
[Variation "anti-Meran, Szabo variation"]

d4 d5 c4 e6 Nc3 Nf6 Nf3 c6 Bg5 dxc4 e4 b5 e5 h6 Bh4 g5 Nxg5 hxg5 Bxg5 Nbd7 Qf3 *

[ECO "D44"]
[Opening "QGD semi-Slav"]
[Variation "anti-Meran, Alatortsev system"]

d4 d5 c4 e6 Nc3 Nf6 Nf3 c6 Bg5 dxc4 e4 b5 e5 h6 Bh4 g5 Nxg5 Nd5 *

[ECO "D45"]
[Opening "QGD semi-Slav"]
[Variation "5.e3"]

d4 d5 c4 e6 Nc3 Nf6 Nf3 c6 e3 *

[ECO "D45"]
[Opening "QGD semi-Slav"]
[Variation "stonewall defence"]

d4 d5 c4 e6 Nc3 Nf6 Nf3 c6 e3 Ne4 Bd3 f5 *

[ECO "D45"]
[Opening "QGD semi-Slav"]
[Variation "accelerated Meran (Alekhine variation)"]

d4 d5 c4 e6 Nc3 Nf6 Nf3 c6 e3 a6 *

[ECO "D45"]
[Opening "QGD semi-Slav"]
[Variation "5...Nd7"]

d4 d5 c4 e6 Nc3 Nf6 Nf3 c6 e3 Nbd7 *

[ECO "D45"]
[Opening "QGD semi-Slav"]
[Variation "Stoltz variation"]

d4 d5 c4 e6 Nc3 Nf6 Nf3 c6 e3 Nbd7 Qc2 *

[ECO "D45"]
[Opening "QGD semi-Slav"]
[Variation "Rubinstein (anti-Meran) system"]

d4 d5 c4 e6 Nc3 Nf6 Nf3 c6 e3 Nbd7 Ne5 *

[ECO "D46"]
[Opening "QGD semi-Slav"]
[Variation "6.Bd3"]

d4 d5 c4 e6 Nc3 Nf6 Nf3 c6 e3 Nbd7 Bd3 *

[ECO "D46"]
[Opening "QGD semi-Slav"]
[Variation "Bogolyubov variation"]

d4 d5 c4 e6 Nc3 Nf6 Nf3 c6 e3 Nbd7 Bd3 Be7 *

[ECO "D46"]
[Opening "QGD semi-Slav"]
[Variation "Romih variation"]

d4 d5 c4 e6 Nc3 Nf6 Nf3 c6 e3 Nbd7 Bd3 Bb4 *

[ECO "D46"]
[Opening "QGD semi-Slav"]
[Variation "Chigorin defence"]

d4 d5 c4 e6 Nc3 Nf6 Nf3 c6 e3 Nbd7 Bd3 Bd6 *

[ECO "D47"]
[Opening "QGD semi-Slav"]
[Variation "7.Bc4"]

d4 d5 c4 e6 Nc3 Nf6 Nf3 c6 e3 Nbd7 Bd3 dxc4 Bxc4 *

[ECO "D47"]
[Opening "QGD semi-Slav"]
[Variation "Meran variation"]

d4 d5 c4 e6 Nc3 Nf6 Nf3 c6 e3 Nbd7 Bd3 dxc4 Bxc4 b5 *

[ECO "D47"]
[Opening "QGD semi-Slav"]
[Variation "neo-Meran (Lundin variation)"]

d4 d5 c4 e6 Nc3 Nf6 Nf3 c6 e3 Nbd7 Bd3 dxc4 Bxc4 b5 Bd3 b4 *

[ECO "D47"]
[Opening "QGD semi-Slav"]
[Variation "Meran, Wade variation"]

d4 d5 c4 e6 Nc3 Nf6 Nf3 c6 e3 Nbd7 Bd3 dxc4 Bxc4 b5 Bd3 Bb7 *

[ECO "D48"]
[Opening "QGD semi-Slav"]
[Variation "Meran, 8...a6"]

d4 d5 c4 e6 Nc3 Nf6 Nf3 c6 e3 Nbd7 Bd3 dxc4 Bxc4 b5 Bd3 a6 *

[ECO "D48"]
[Opening "QGD semi-Slav"]
[Variation "Meran, Pirc variation"]

d4 d5 c4 e6 Nc3 Nf6 Nf3 c6 e3 Nbd7 Bd3 dxc4 Bxc4 b5 Bd3 a6 e4 b4 *

[ECO "D48"]
[Opening "QGD semi-Slav"]
[Variation "Meran"]

d4 d5 c4 e6 Nc3 Nf6 Nf3 c6 e3 Nbd7 Bd3 dxc4 Bxc4 b5 Bd3 a6 e4 c5 *

[ECO "D48"]
[Opening "QGD semi-Slav"]
[Variation "Meran, Reynolds' variation"]

d4 d5 c4 e6 Nc3 Nf6 Nf3 c6 e3 Nbd7 Bd3 dxc4 Bxc4 b5 Bd3 a6 e4 c5 d5 *

[ECO "D48"]
[Opening "QGD semi-Slav"]
[Variation "Meran, old main line"]

d4 d5 c4 e6 Nc3 Nf6 Nf3 c6 e3 Nbd7 Bd3 dxc4 Bxc4 b5 Bd3 a6 e4 c5 e5 *

[ECO "D49"]
[Opening "QGD semi-Slav"]
[Variation "Meran, Blumenfeld variation"]

d4 d5 c4 e6 Nc3 Nf6 Nf3 c6 e3 Nbd7 Bd3 dxc4 Bxc4 b5 Bd3 a6 e4 c5 e5 cxd4 Nxb5 *

[ECO "D49"]
[Opening "QGD semi-Slav"]
[Variation "Meran, Rabinovich variation"]

d4 d5 c4 e6 Nc3 Nf6 Nf3 c6 e3 Nbd7 Bd3 dxc4 Bxc4 b5 Bd3 a6 e4 c5 e5 cxd4 Nxb5 Ng4 *

[ECO "D49"]
[Opening "QGD semi-Slav"]
[Variation "Meran, Sozin variation"]

d4 d5 c4 e6 Nc3 Nf6 Nf3 c6 e3 Nbd7 Bd3 dxc4 Bxc4 b5 Bd3 a6 e4 c5 e5 cxd4 Nxb5 Nxe5 *

[ECO "D49"]
[Opening "QGD semi-Slav"]
[Variation "Meran, Stahlberg variation"]

d4 d5 c4 e6 Nc3 Nf6 Nf3 c6 e3 Nbd7 Bd3 dxc4 Bxc4 b5 Bd3 a6 e4 c5 e5 cxd4 Nxb5 Nxe5 Nxe5 axb5 Qf3 *

[ECO "D49"]
[Opening "QGD semi-Slav"]
[Variation "Meran, Sozin variation"]

d4 d5 c4 e6 Nc3 Nf6 Nf3 c6 e3 Nbd7 Bd3 dxc4 Bxc4 b5 Bd3 a6 e4 c5 e5 cxd4 Nxb5 Nxe5 Nxe5 axb5 O-O *

[ECO "D49"]
[Opening "QGD semi-Slav"]
[Variation "Meran, Rellstab attack"]

d4 d5 c4 e6 Nc3 Nf6 Nf3 c6 e3 Nbd7 Bd3 dxc4 Bxc4 b5 Bd3 a6 e4 c5 e5 cxd4 Nxb5 Nxe5 Nxe5 axb5 O-O Qd5 Qe2 Ba6 Bg5 *

[ECO "D50"]
[Opening "QGD"]
[Variation "4.Bg5"]

d4 d5 c4 e6 Nc3 Nf6 Bg5 *

[ECO "D50"]
[Opening "QGD"]
[Variation "Been-Koomen variation"]

d4 d5 c4 e6 Nc3 Nf6 Bg5 c5 *

[ECO "D50"]
[Opening "QGD"]
[Variation "Semi-Tarrasch, Krause variation"]

d4 d5 c4 e6 Nc3 Nf6 Bg5 c5 Nf3 cxd4 Nxd4 e5 Ndb5 a6 Qa4 *

[ECO "D50"]
[Opening "QGD"]
[Variation "Semi-Tarrasch, Primitive Pillsbury variation"]

d4 d5 c4 e6 Nc3 Nf6 Bg5 c5 Nf3 cxd4 Qxd4 *

[ECO "D50"]
[Opening "QGD"]
[Variation "Semi-Tarrasch"]

d4 d5 c4 e6 Nc3 Nf6 Bg5 c5 cxd5 *

[ECO "D50"]
[Opening "QGD"]
[Variation "Canal (Venice) variation"]

d4 d5 c4 e6 Nc3 Nf6 Bg5 c5 cxd5 Qb6 *

[ECO "D51"]
[Opening "QGD"]
[Variation "4.Bg5 Nbd7"]

d4 d5 c4 e6 Nc3 Nf6 Bg5 Nbd7 *

[ECO "D51"]
[Opening "QGD"]
[Variation "Rochlin variation"]

d4 d5 c4 e6 Nc3 Nf6 Bg5 Nbd7 Nf3 c6 Rc1 Qa5 Bd2 *

[ECO "D51"]
[Opening "QGD"]
[Variation "Alekhine variation"]

d4 d5 c4 e6 Nc3 Nf6 Bg5 Nbd7 Nf3 c6 e4 *

[ECO "D51"]
[Opening "QGD"]

d4 d5 c4 e6 Nc3 Nf6 Bg5 Nbd7 e3 *

[ECO "D51"]
[Opening "QGD"]
[Variation "Manhattan variation"]

d4 d5 c4 e6 Nc3 Nf6 Bg5 Nbd7 e3 Bb4 *

[ECO "D51"]
[Opening "QGD"]
[Variation "5...c6"]

d4 d5 c4 e6 Nc3 Nf6 Bg5 Nbd7 e3 c6 *

[ECO "D51"]
[Opening "QGD"]
[Variation "Capablanca anti-Cambridge Springs variation"]

d4 d5 c4 e6 Nc3 Nf6 Bg5 Nbd7 e3 c6 a3 *

[ECO "D52"]
[Opening "QGD"]

d4 d5 c4 e6 Nc3 Nf6 Bg5 Nbd7 e3 c6 Nf3 *

[ECO "D52"]
[Opening "QGD"]
[Variation "Cambridge Springs defence"]

d4 d5 c4 e6 Nc3 Nf6 Bg5 Nbd7 e3 c6 Nf3 Qa5 *

[ECO "D52"]
[Opening "QGD"]
[Variation "Cambridge Springs defence, Bogoljubow variation"]

d4 d5 c4 e6 Nc3 Nf6 Bg5 Nbd7 e3 c6 Nf3 Qa5 Nd2 Bb4 Qc2 *

[ECO "D52"]
[Opening "QGD"]
[Variation "Cambridge Springs defence, Argentine variation"]

d4 d5 c4 e6 Nc3 Nf6 Bg5 Nbd7 e3 c6 Nf3 Qa5 Nd2 Bb4 Qc2 O-O Bh4 *

[ECO "D52"]
[Opening "QGD"]
[Variation "Cambridge Springs defence, Rubinstein variation"]

d4 d5 c4 e6 Nc3 Nf6 Bg5 Nbd7 e3 c6 Nf3 Qa5 Nd2 dxc4 *

[ECO "D52"]
[Opening "QGD"]
[Variation "Cambridge Springs defence, Capablanca variation"]

d4 d5 c4 e6 Nc3 Nf6 Bg5 Nbd7 e3 c6 Nf3 Qa5 Bxf6 *

[ECO "D52"]
[Opening "QGD"]
[Variation "Cambridge Springs defence, 7.cd"]

d4 d5 c4 e6 Nc3 Nf6 Bg5 Nbd7 e3 c6 Nf3 Qa5 cxd5 *

[ECO "D52"]
[Opening "QGD"]
[Variation "Cambridge Springs defence, Yugoslav variation"]

d4 d5 c4 e6 Nc3 Nf6 Bg5 Nbd7 e3 c6 Nf3 Qa5 cxd5 Nxd5 *

[ECO "D53"]
[Opening "QGD"]
[Variation "4.Bg5 Be7"]

d4 d5 c4 e6 Nc3 Nf6 Bg5 Be7 *

[ECO "D53"]
[Opening "QGD"]
[Variation "Lasker variation"]

d4 d5 c4 e6 Nc3 Nf6 Bg5 Be7 e3 Ne4 *

[ECO "D53"]
[Opening "QGD"]
[Variation "4.Bg5 Be7, 5.e3 O-O"]

d4 d5 c4 e6 Nc3 Nf6 Bg5 Be7 e3 O-O *

[ECO "D54"]
[Opening "QGD"]
[Variation "Anti-neo-orthodox variation"]

d4 d5 c4 e6 Nc3 Nf6 Bg5 Be7 e3 O-O Rc1 *

[ECO "D55"]
[Opening "QGD"]
[Variation "6.Nf3"]

d4 d5 c4 e6 Nc3 Nf6 Bg5 Be7 e3 O-O Nf3 *

[ECO "D55"]
[Opening "QGD"]
[Variation "Pillsbury attack"]

d4 d5 c4 e6 Nc3 Nf6 Bg5 Be7 e3 O-O Nf3 b6 Bd3 Bb7 cxd5 exd5 Ne5 *

[ECO "D55"]
[Opening "QGD"]
[Variation "Neo-orthodox variation"]

d4 d5 c4 e6 Nc3 Nf6 Bg5 Be7 e3 O-O Nf3 h6 *

[ECO "D55"]
[Opening "QGD"]
[Variation "Neo-orthodox variation, 7.Bxf6"]

d4 d5 c4 e6 Nc3 Nf6 Bg5 Be7 e3 O-O Nf3 h6 Bxf6 *

[ECO "D55"]
[Opening "QGD"]
[Variation "Petrosian variation"]

d4 d5 c4 e6 Nc3 Nf6 Bg5 Be7 e3 O-O Nf3 h6 Bxf6 Bxf6 Rc1 c6 Bd3 Nd7 O-O dxc4 Bxc4 *

[ECO "D55"]
[Opening "QGD"]
[Variation "Neo-orthodox variation, 7.Bh4"]

d4 d5 c4 e6 Nc3 Nf6 Bg5 Be7 e3 O-O Nf3 h6 Bh4 *

[ECO "D56"]
[Opening "QGD"]
[Variation "Lasker defence"]

d4 d5 c4 e6 Nc3 Nf6 Bg5 Be7 e3 O-O Nf3 h6 Bh4 Ne4 *

[ECO "D56"]
[Opening "QGD"]
[Variation "Lasker defence, Teichmann variation"]

d4 d5 c4 e6 Nc3 Nf6 Bg5 Be7 e3 O-O Nf3 h6 Bh4 Ne4 Bxe7 Qxe7 Qc2 *

[ECO "D56"]
[Opening "QGD"]
[Variation "Lasker defence, Russian variation"]

d4 d5 c4 e6 Nc3 Nf6 Bg5 Be7 e3 O-O Nf3 h6 Bh4 Ne4 Bxe7 Qxe7 Qc2 Nf6 Bd3 dxc4 Bxc4 c5 O-O Nc6 Rfd1 Bd7 *

[ECO "D57"]
[Opening "QGD"]
[Variation "Lasker defence, main line"]

d4 d5 c4 e6 Nc3 Nf6 Bg5 Be7 e3 O-O Nf3 h6 Bh4 Ne4 Bxe7 Qxe7 cxd5 Nxc3 bxc3 *

[ECO "D57"]
[Opening "QGD"]
[Variation "Lasker defence, Bernstein variation"]

d4 d5 c4 e6 Nc3 Nf6 Bg5 Be7 e3 O-O Nf3 h6 Bh4 Ne4 Bxe7 Qxe7 cxd5 Nxc3 bxc3 exd5 Qb3 Qd6 *

[ECO "D58"]
[Opening "QGD"]
[Variation "Tartakower (Makagonov-Bondarevsky) system"]

d4 d5 c4 e6 Nc3 Nf6 Bg5 Be7 e3 O-O Nf3 h6 Bh4 b6 *

[ECO "D59"]
[Opening "QGD"]
[Variation "Tartakower (Makagonov-Bondarevsky) system, 8.cd Nxd5"]

d4 d5 c4 e6 Nc3 Nf6 Bg5 Be7 e3 O-O Nf3 h6 Bh4 b6 cxd5 Nxd5 *

[ECO "D59"]
[Opening "QGD"]
[Variation "Tartakower variation"]

d4 d5 c4 e6 Nc3 Nf6 Bg5 Be7 e3 O-O Nf3 h6 Bh4 b6 cxd5 Nxd5 Bxe7 Qxe7 Nxd5 exd5 Rc1 Be6 *

[ECO "D60"]
[Opening "QGD"]
[Variation "Orthodox defence"]

d4 d5 c4 e6 Nc3 Nf6 Bg5 Be7 e3 O-O Nf3 Nbd7 *

[ECO "D60"]
[Opening "QGD"]
[Variation "Orthodox defence, Botvinnik variation"]

d4 d5 c4 e6 Nc3 Nf6 Bg5 Be7 e3 O-O Nf3 Nbd7 Bd3 *

[ECO "D60"]
[Opening "QGD"]
[Variation "Orthodox defence, Rauzer variation"]

d4 d5 c4 e6 Nc3 Nf6 Bg5 Be7 e3 O-O Nf3 Nbd7 Qb3 *

[ECO "D61"]
[Opening "QGD"]
[Variation "Orthodox defence, Rubinstein variation"]

d4 d5 c4 e6 Nc3 Nf6 Bg5 Be7 e3 O-O Nf3 Nbd7 Qc2 *

[ECO "D62"]
[Opening "QGD"]
[Variation "Orthodox defence, 7.Qc2 c5, 8.cd (Rubinstein)"]

d4 d5 c4 e6 Nc3 Nf6 Bg5 Be7 e3 O-O Nf3 Nbd7 Qc2 c5 cxd5 *

[ECO "D63"]
[Opening "QGD"]
[Variation "Orthodox defence, 7.Rc1"]

d4 d5 c4 e6 Nc3 Nf6 Bg5 Be7 e3 O-O Nf3 Nbd7 Rc1 *

[ECO "D63"]
[Opening "QGD"]
[Variation "Orthodox defence, Pillsbury attack"]

d4 d5 c4 e6 Nc3 Nf6 Bg5 Be7 e3 O-O Nf3 Nbd7 Rc1 b6 cxd5 exd5 Bd3 *

[ECO "D63"]
[Opening "QGD"]
[Variation "Orthodox defence, Capablanca variation"]

d4 d5 c4 e6 Nc3 Nf6 Bg5 Be7 e3 O-O Nf3 Nbd7 Rc1 b6 cxd5 exd5 Bb5 *

[ECO "D63"]
[Opening "QGD"]
[Variation "Orthodox defence, Swiss (Henneberger) variation"]

d4 d5 c4 e6 Nc3 Nf6 Bg5 Be7 e3 O-O Nf3 Nbd7 Rc1 a6 *

[ECO "D63"]
[Opening "QGD"]
[Variation "Orthodox defence, Swiss, Karlsbad variation"]

d4 d5 c4 e6 Nc3 Nf6 Bg5 Be7 e3 O-O Nf3 Nbd7 Rc1 a6 cxd5 *

[ECO "D63"]
[Opening "QGD"]
[Variation "Orthodox defence"]

d4 d5 c4 e6 Nc3 Nf6 Bg5 Be7 e3 O-O Nf3 Nbd7 Rc1 c6 *

[ECO "D64"]
[Opening "QGD"]
[Variation "Orthodox defence, Rubinstein attack (with Rc1)"]

d4 d5 c4 e6 Nc3 Nf6 Bg5 Be7 e3 O-O Nf3 Nbd7 Rc1 c6 Qc2 *

[ECO "D64"]
[Opening "QGD"]
[Variation "Orthodox defence, Rubinstein attack, Wolf variation"]

d4 d5 c4 e6 Nc3 Nf6 Bg5 Be7 e3 O-O Nf3 Nbd7 Rc1 c6 Qc2 Ne4 *

[ECO "D64"]
[Opening "QGD"]
[Variation "Orthodox defence, Rubinstein attack, Karlsbad variation"]

d4 d5 c4 e6 Nc3 Nf6 Bg5 Be7 e3 O-O Nf3 Nbd7 Rc1 c6 Qc2 a6 *

[ECO "D64"]
[Opening "QGD"]
[Variation "Orthodox defence, Rubinstein attack, Grünfeld variation"]

d4 d5 c4 e6 Nc3 Nf6 Bg5 Be7 e3 O-O Nf3 Nbd7 Rc1 c6 Qc2 a6 a3 *

[ECO "D65"]
[Opening "QGD"]
[Variation "Orthodox defence, Rubinstein attack, main line"]

d4 d5 c4 e6 Nc3 Nf6 Bg5 Be7 e3 O-O Nf3 Nbd7 Rc1 c6 Qc2 a6 cxd5 *

[ECO "D66"]
[Opening "QGD"]
[Variation "Orthodox defence, Bd3 line"]

d4 d5 c4 e6 Nc3 Nf6 Bg5 Be7 e3 O-O Nf3 Nbd7 Rc1 c6 Bd3 *

[ECO "D66"]
[Opening "QGD"]
[Variation "Orthodox defence, Bd3 line, fianchetto variation"]

d4 d5 c4 e6 Nc3 Nf6 Bg5 Be7 e3 O-O Nf3 Nbd7 Rc1 c6 Bd3 dxc4 Bxc4 b5 *

[ECO "D67"]
[Opening "QGD"]
[Variation "Orthodox defence, Bd3 line, Capablanca freeing manoevre"]

d4 d5 c4 e6 Nc3 Nf6 Bg5 Be7 e3 O-O Nf3 Nbd7 Rc1 c6 Bd3 dxc4 Bxc4 Nd5 *

[ECO "D67"]
[Opening "QGD"]
[Variation "Orthodox defence, Bd3 line, Janowski variation"]

d4 d5 c4 e6 Nc3 Nf6 Bg5 Be7 e3 O-O Nf3 Nbd7 Rc1 c6 Bd3 dxc4 Bxc4 Nd5 h4 *

[ECO "D67"]
[Opening "QGD"]
[Variation "Orthodox defence, Bd3 line"]

d4 d5 c4 e6 Nc3 Nf6 Bg5 Be7 e3 O-O Nf3 Nbd7 Rc1 c6 Bd3 dxc4 Bxc4 Nd5 Bxe7 Qxe7 *

[ECO "D67"]
[Opening "QGD"]
[Variation "Orthodox defence, Bd3 line, Alekhine variation"]

d4 d5 c4 e6 Nc3 Nf6 Bg5 Be7 e3 O-O Nf3 Nbd7 Rc1 c6 Bd3 dxc4 Bxc4 Nd5 Bxe7 Qxe7 Ne4 *

[ECO "D67"]
[Opening "QGD"]
[Variation "Orthodox defence, Bd3 line, 11.O-O"]

d4 d5 c4 e6 Nc3 Nf6 Bg5 Be7 e3 O-O Nf3 Nbd7 Rc1 c6 Bd3 dxc4 Bxc4 Nd5 Bxe7 Qxe7 O-O *

[ECO "D68"]
[Opening "QGD"]
[Variation "Orthodox defence, classical variation"]

d4 d5 c4 e6 Nc3 Nf6 Bg5 Be7 e3 O-O Nf3 Nbd7 Rc1 c6 Bd3 dxc4 Bxc4 Nd5 Bxe7 Qxe7 O-O Nxc3 Rxc3 e5 *

[ECO "D68"]
[Opening "QGD"]
[Variation "Orthodox defence, classical, 13.d1b1 (Maroczy)"]

d4 d5 c4 e6 Nc3 Nf6 Bg5 Be7 e3 O-O Nf3 Nbd7 Rc1 c6 Bd3 dxc4 Bxc4 Nd5 Bxe7 Qxe7 O-O Nxc3 Rxc3 e5 Qb1 *

[ECO "D68"]
[Opening "QGD"]
[Variation "Orthodox defence, classical, 13.d1c2 (Vidmar)"]

d4 d5 c4 e6 Nc3 Nf6 Bg5 Be7 e3 O-O Nf3 Nbd7 Rc1 c6 Bd3 dxc4 Bxc4 Nd5 Bxe7 Qxe7 O-O Nxc3 Rxc3 e5 Qc2 *

[ECO "D69"]
[Opening "QGD"]
[Variation "Orthodox defence, classical, 13.de"]

d4 d5 c4 e6 Nc3 Nf6 Bg5 Be7 e3 O-O Nf3 Nbd7 Rc1 c6 Bd3 dxc4 Bxc4 Nd5 Bxe7 Qxe7 O-O Nxc3 Rxc3 e5 dxe5 Nxe5 Nxe5 Qxe5 *

[ECO "D70"]
[Opening "Neo-Grünfeld defence"]

d4 Nf6 c4 g6 f3 d5 *

[ECO "D70"]
[Opening "Neo-Grünfeld (Kemeri) defence"]

d4 Nf6 c4 g6 g3 d5 *

[ECO "D71"]
[Opening "Neo-Grünfeld, 5.cd"]

d4 Nf6 c4 g6 g3 d5 Bg2 Bg7 cxd5 Nxd5 *

[ECO "D72"]
[Opening "Neo-Grünfeld, 5.cd, main line"]

d4 Nf6 c4 g6 g3 d5 Bg2 Bg7 cxd5 Nxd5 e4 Nb6 Ne2 *

[ECO "D73"]
[Opening "Neo-Grünfeld, 5.Nf3"]

d4 Nf6 c4 g6 g3 d5 Bg2 Bg7 Nf3 *

[ECO "D74"]
[Opening "Neo-Grünfeld, 6.cd Nxd5, 7.O-O"]

d4 Nf6 c4 g6 g3 d5 Bg2 Bg7 Nf3 O-O cxd5 Nxd5 O-O *

[ECO "D75"]
[Opening "Neo-Grünfeld, 6.cd Nxd5, 7.O-O c5, 8.Nc3"]

d4 Nf6 c4 g6 g3 d5 Bg2 Bg7 Nf3 O-O cxd5 Nxd5 O-O c5 Nc3 *

[ECO "D75"]
[Opening "Neo-Grünfeld, 6.cd Nxd5, 7.O-O c5, 8.dc"]

d4 Nf6 c4 g6 g3 d5 Bg2 Bg7 Nf3 O-O cxd5 Nxd5 O-O c5 dxc5 *

[ECO "D76"]
[Opening "Neo-Grünfeld, 6.cd Nxd5, 7.O-O Nb6"]

d4 Nf6 c4 g6 g3 d5 Bg2 Bg7 Nf3 O-O cxd5 Nxd5 O-O Nb6 *

[ECO "D77"]
[Opening "Neo-Grünfeld, 6.O-O"]

d4 Nf6 c4 g6 g3 d5 Bg2 Bg7 Nf3 O-O O-O *

[ECO "D78"]
[Opening "Neo-Grünfeld, 6.O-O c6"]

d4 Nf6 c4 g6 g3 d5 Bg2 Bg7 Nf3 O-O O-O c6 *

[ECO "D79"]
[Opening "Neo-Grünfeld, 6.O-O, main line"]

d4 Nf6 c4 g6 g3 d5 Bg2 Bg7 Nf3 O-O O-O c6 cxd5 cxd5 *

[ECO "D80"]
[Opening "Grünfeld defence"]

d4 Nf6 c4 g6 Nc3 d5 *

[ECO "D80"]
[Opening "Grünfeld"]
[Variation "Spike gambit"]

d4 Nf6 c4 g6 Nc3 d5 g4 *

[ECO "D80"]
[Opening "Grünfeld"]
[Variation "Stockholm variation"]

d4 Nf6 c4 g6 Nc3 d5 Bg5 *

[ECO "D80"]
[Opening "Grünfeld"]
[Variation "Lundin variation"]

d4 Nf6 c4 g6 Nc3 d5 Bg5 Ne4 Nxe4 dxe4 Qd2 c5 *

[ECO "D81"]
[Opening "Grünfeld"]
[Variation "Russian variation"]

d4 Nf6 c4 g6 Nc3 d5 Qb3 *

[ECO "D82"]
[Opening "Grünfeld"]
[Variation "4.Bf4"]

d4 Nf6 c4 g6 Nc3 d5 Bf4 *

[ECO "D83"]
[Opening "Grünfeld"]
[Variation "Grünfeld gambit"]

d4 Nf6 c4 g6 Nc3 d5 Bf4 Bg7 e3 O-O *

[ECO "D83"]
[Opening "Grünfeld"]
[Variation "Grünfeld gambit, Capablanca variation"]

d4 Nf6 c4 g6 Nc3 d5 Bf4 Bg7 e3 O-O Rc1 *

[ECO "D83"]
[Opening "Grünfeld"]
[Variation "Grünfeld gambit, Botvinnik variation"]

d4 Nf6 c4 g6 Nc3 d5 Bf4 Bg7 e3 O-O Rc1 c5 dxc5 Be6 *

[ECO "D84"]
[Opening "Grünfeld"]
[Variation "Grünfeld gambit accepted"]

d4 Nf6 c4 g6 Nc3 d5 Bf4 Bg7 e3 O-O cxd5 Nxd5 Nxd5 Qxd5 Bxc7 *

[ECO "D85"]
[Opening "Grünfeld"]
[Variation "exchange variation"]

d4 Nf6 c4 g6 Nc3 d5 cxd5 Nxd5 *

[ECO "D85"]
[Opening "Grünfeld"]
[Variation "modern exchange variation"]

d4 Nf6 c4 g6 Nc3 d5 cxd5 Nxd5 e4 Nxc3 bxc3 Bg7 Nf3 *

[ECO "D86"]
[Opening "Grünfeld"]
[Variation "exchange, classical variation"]

d4 Nf6 c4 g6 Nc3 d5 cxd5 Nxd5 e4 Nxc3 bxc3 Bg7 Bc4 *

[ECO "D86"]
[Opening "Grünfeld"]
[Variation "exchange, Larsen variation"]

d4 Nf6 c4 g6 Nc3 d5 cxd5 Nxd5 e4 Nxc3 bxc3 Bg7 Bc4 O-O Ne2 Qd7 O-O b6 *

[ECO "D86"]
[Opening "Grünfeld"]
[Variation "exchange, Simagin's lesser variation"]

d4 Nf6 c4 g6 Nc3 d5 cxd5 Nxd5 e4 Nxc3 bxc3 Bg7 Bc4 O-O Ne2 b6 *

[ECO "D86"]
[Opening "Grünfeld"]
[Variation "exchange, Simagin's improved variation"]

d4 Nf6 c4 g6 Nc3 d5 cxd5 Nxd5 e4 Nxc3 bxc3 Bg7 Bc4 O-O Ne2 Nc6 *

[ECO "D87"]
[Opening "Grünfeld"]
[Variation "exchange, Spassky variation"]

d4 Nf6 c4 g6 Nc3 d5 cxd5 Nxd5 e4 Nxc3 bxc3 Bg7 Bc4 O-O Ne2 c5 *

[ECO "D87"]
[Opening "Grünfeld"]
[Variation "exchange, Seville variation"]

d4 Nf6 c4 g6 Nc3 d5 cxd5 Nxd5 e4 Nxc3 bxc3 Bg7 Bc4 O-O Ne2 c5 O-O Nc6 Be3 Bg4 f3 Na5 Bxf7+ *

[ECO "D88"]
[Opening "Grünfeld"]
[Variation "Spassky variation, main line, 10...cd, 11.cd"]

d4 Nf6 c4 g6 Nc3 d5 cxd5 Nxd5 e4 Nxc3 bxc3 Bg7 Bc4 O-O Ne2 c5 O-O Nc6 Be3 cxd4 cxd4 *

[ECO "D89"]
[Opening "Grünfeld"]
[Variation "Spassky variation, main line, 13.Bd3"]

d4 Nf6 c4 g6 Nc3 d5 cxd5 Nxd5 e4 Nxc3 bxc3 Bg7 Bc4 O-O Ne2 c5 O-O Nc6 Be3 cxd4 cxd4 Bg4 f3 Na5 Bd3 Be6 *

[ECO "D89"]
[Opening "Grünfeld"]
[Variation "exchange, Sokolsky variation"]

d4 Nf6 c4 g6 Nc3 d5 cxd5 Nxd5 e4 Nxc3 bxc3 Bg7 Bc4 O-O Ne2 c5 O-O Nc6 Be3 cxd4 cxd4 Bg4 f3 Na5 Bd3 Be6 d5 *

[ECO "D90"]
[Opening "Grünfeld"]
[Variation "Three knights variation"]

d4 Nf6 c4 g6 Nc3 d5 Nf3 *

[ECO "D90"]
[Opening "Grünfeld"]
[Variation "Schlechter variation"]

d4 Nf6 c4 g6 Nc3 d5 Nf3 c6 *

[ECO "D90"]
[Opening "Grünfeld"]
[Variation "Three knights variation"]

d4 Nf6 c4 g6 Nc3 d5 Nf3 Bg7 *

[ECO "D90"]
[Opening "Grünfeld"]
[Variation "Flohr variation"]

d4 Nf6 c4 g6 Nc3 d5 Nf3 Bg7 Qa4+ *

[ECO "D91"]
[Opening "Grünfeld"]
[Variation "5.Bg5"]

d4 Nf6 c4 g6 Nc3 d5 Nf3 Bg7 Bg5 *

[ECO "D92"]
[Opening "Grünfeld"]
[Variation "5.Bf4"]

d4 Nf6 c4 g6 Nc3 d5 Nf3 Bg7 Bf4 *

[ECO "D93"]
[Opening "Grünfeld with Bf4 e3"]

d4 Nf6 c4 g6 Nc3 d5 Nf3 Bg7 Bf4 O-O e3 *

[ECO "D94"]
[Opening "Grünfeld"]
[Variation "5.e3"]

d4 Nf6 c4 g6 Nc3 d5 Nf3 Bg7 e3 *

[ECO "D94"]
[Opening "Grünfeld"]
[Variation "Makogonov variation"]

d4 Nf6 c4 g6 Nc3 d5 Nf3 Bg7 e3 O-O b4 *

[ECO "D94"]
[Opening "Grünfeld"]
[Variation "Opočenský variation"]

d4 Nf6 c4 g6 Nc3 d5 Nf3 Bg7 e3 O-O Bd2 *

[ECO "D94"]
[Opening "Grünfeld with e3 Bd3"]

d4 Nf6 c4 g6 Nc3 d5 Nf3 Bg7 e3 O-O Bd3 *

[ECO "D94"]
[Opening "Grünfeld"]
[Variation "Smyslov defence"]

d4 Nf6 c4 g6 Nc3 d5 Nf3 Bg7 e3 O-O Bd3 c6 O-O Bg4 *

[ECO "D94"]
[Opening "Grünfeld"]
[Variation "Flohr defence"]

d4 Nf6 c4 g6 Nc3 d5 Nf3 Bg7 e3 O-O Bd3 c6 O-O Bf5 *

[ECO "D95"]
[Opening "Grünfeld with e3 & Qb3"]

d4 Nf6 c4 g6 Nc3 d5 Nf3 Bg7 e3 O-O Qb3 *

[ECO "D95"]
[Opening "Grünfeld"]
[Variation "Botvinnik variation"]

d4 Nf6 c4 g6 Nc3 d5 Nf3 Bg7 e3 O-O Qb3 e6 *

[ECO "D95"]
[Opening "Grünfeld"]
[Variation "Pachman variation"]

d4 Nf6 c4 g6 Nc3 d5 Nf3 Bg7 e3 O-O Qb3 dxc4 Bxc4 Nbd7 Ng5 *

[ECO "D96"]
[Opening "Grünfeld"]
[Variation "Russian variation"]

d4 Nf6 c4 g6 Nc3 d5 Nf3 Bg7 Qb3 *

[ECO "D97"]
[Opening "Grünfeld"]
[Variation "Russian variation with e4"]

d4 Nf6 c4 g6 Nc3 d5 Nf3 Bg7 Qb3 dxc4 Qxc4 O-O e4 *

[ECO "D97"]
[Opening "Grünfeld"]
[Variation "Russian, Alekhine (Hungarian) variation"]

d4 Nf6 c4 g6 Nc3 d5 Nf3 Bg7 Qb3 dxc4 Qxc4 O-O e4 a6 *

[ECO "D97"]
[Opening "Grünfeld"]
[Variation "Russian, Szabo (Boleslavsky) variation"]

d4 Nf6 c4 g6 Nc3 d5 Nf3 Bg7 Qb3 dxc4 Qxc4 O-O e4 c6 *

[ECO "D97"]
[Opening "Grünfeld"]
[Variation "Russian, Levenfish variation"]

d4 Nf6 c4 g6 Nc3 d5 Nf3 Bg7 Qb3 dxc4 Qxc4 O-O e4 b6 *

[ECO "D97"]
[Opening "Grünfeld"]
[Variation "Russian, Byrne (Simagin) variation"]

d4 Nf6 c4 g6 Nc3 d5 Nf3 Bg7 Qb3 dxc4 Qxc4 O-O e4 Nc6 *

[ECO "D97"]
[Opening "Grünfeld"]
[Variation "Russian, Prins variation"]

d4 Nf6 c4 g6 Nc3 d5 Nf3 Bg7 Qb3 dxc4 Qxc4 O-O e4 Na6 *

[ECO "D98"]
[Opening "Grünfeld"]
[Variation "Russian, Smyslov variation"]

d4 Nf6 c4 g6 Nc3 d5 Nf3 Bg7 Qb3 dxc4 Qxc4 O-O e4 Bg4 *

[ECO "D98"]
[Opening "Grünfeld"]
[Variation "Russian, Keres variation"]

d4 Nf6 c4 g6 Nc3 d5 Nf3 Bg7 Qb3 dxc4 Qxc4 O-O e4 Bg4 Be3 Nfd7 Be2 Nb6 Qd3 Nc6 O-O-O *

[ECO "D99"]
[Opening "Grünfeld defence"]
[Variation "Smyslov, main line"]

d4 Nf6 c4 g6 Nc3 d5 Nf3 Bg7 Qb3 dxc4 Qxc4 O-O e4 Bg4 Be3 Nfd7 Qb3 *

[ECO "D99"]
[Opening "Grünfeld defence"]
[Variation "Smyslov, Yugoslav variation"]

d4 Nf6 c4 g6 Nc3 d5 Nf3 Bg7 Qb3 dxc4 Qxc4 O-O e4 Bg4 Be3 Nfd7 Qb3 c5 *

[ECO "E00"]
[Opening "Queen's pawn game"]

d4 Nf6 c4 e6 *

[ECO "E00"]
[Opening "Neo-Indian (Seirawan) attack"]

d4 Nf6 c4 e6 Bg5 *

[ECO "E00"]
[Opening "Catalan opening"]

d4 Nf6 c4 e6 g3 *

[ECO "E01"]
[Opening "Catalan"]
[Variation "closed"]

d4 Nf6 c4 e6 g3 d5 Bg2 *

[ECO "E02"]
[Opening "Catalan"]
[Variation "open, 5.Qa4"]

d4 Nf6 c4 e6 g3 d5 Bg2 dxc4 Qa4+ *

[ECO "E03"]
[Opening "Catalan"]
[Variation "open, Alekhine variation"]

d4 Nf6 c4 e6 g3 d5 Bg2 dxc4 Qa4+ Nbd7 Qxc4 a6 Qc2 *

[ECO "E03"]
[Opening "Catalan"]
[Variation "open, 5.Qa4 Nbd7, 6.Qxc4"]

d4 Nf6 c4 e6 g3 d5 Bg2 dxc4 Qa4+ Nbd7 Qxc4 *

[ECO "E04"]
[Opening "Catalan"]
[Variation "open, 5.Nf3"]

d4 Nf6 c4 e6 g3 d5 Bg2 dxc4 Nf3 *

[ECO "E05"]
[Opening "Catalan"]
[Variation "open, classical line"]

d4 Nf6 c4 e6 g3 d5 Bg2 dxc4 Nf3 Be7 *

[ECO "E06"]
[Opening "Catalan"]
[Variation "closed, 5.Nf3"]

d4 Nf6 c4 e6 g3 d5 Bg2 Be7 Nf3 *

[ECO "E07"]
[Opening "Catalan"]
[Variation "closed, 6...Nbd7"]

d4 Nf6 c4 e6 g3 d5 Bg2 Be7 Nf3 O-O O-O Nbd7 *

[ECO "E07"]
[Opening "Catalan"]
[Variation "closed, Botvinnik variation"]

d4 Nf6 c4 e6 g3 d5 Bg2 Be7 Nf3 O-O O-O Nbd7 Nc3 c6 Qd3 *

[ECO "E08"]
[Opening "Catalan"]
[Variation "closed, 7.Qc2"]

d4 Nf6 c4 e6 g3 d5 Bg2 Be7 Nf3 O-O O-O Nbd7 Qc2 *

[ECO "E08"]
[Opening "Catalan"]
[Variation "closed, Zagoryansky variation"]

d4 Nf6 c4 e6 g3 d5 Bg2 Be7 Nf3 O-O O-O Nbd7 Qc2 c6 Rd1 b6 a4 *

[ECO "E08"]
[Opening "Catalan"]
[Variation "closed, Qc2 & b3"]

d4 Nf6 c4 e6 g3 d5 Bg2 Be7 Nf3 O-O O-O Nbd7 Qc2 c6 b3 *

[ECO "E08"]
[Opening "Catalan"]
[Variation "closed, Spassky gambit"]

d4 Nf6 c4 e6 g3 d5 Bg2 Be7 Nf3 O-O O-O Nbd7 Qc2 c6 b3 b6 Rd1 Bb7 Nc3 b5 *

[ECO "E09"]
[Opening "Catalan"]
[Variation "closed, main line"]

d4 Nf6 c4 e6 g3 d5 Bg2 Be7 Nf3 O-O O-O Nbd7 Qc2 c6 Nbd2 *

[ECO "E09"]
[Opening "Catalan"]
[Variation "closed, Sokolsky variation"]

d4 Nf6 c4 e6 g3 d5 Bg2 Be7 Nf3 O-O O-O Nbd7 Qc2 c6 Nbd2 b6 b3 a5 Bb2 Ba6 *

[ECO "E10"]
[Opening "Queen's pawn game"]

d4 Nf6 c4 e6 Nf3 *

[ECO "E10"]
[Opening "Blumenfeld counter-gambit"]

d4 Nf6 c4 e6 Nf3 c5 d5 b5 *

[ECO "E10"]
[Opening "Blumenfeld counter-gambit accepted"]

d4 Nf6 c4 e6 Nf3 c5 d5 b5 dxe6 fxe6 cxb5 d5 *

[ECO "E10"]
[Opening "Blumenfeld counter-gambit, Dus-Chotimursky variation"]

d4 Nf6 c4 e6 Nf3 c5 d5 b5 Bg5 *

[ECO "E10"]
[Opening "Blumenfeld counter-gambit, Spielmann variation"]

d4 Nf6 c4 e6 Nf3 c5 d5 b5 Bg5 exd5 cxd5 h6 *

[ECO "E10"]
[Opening "Dzindzikhashvili defence"]

d4 Nf6 c4 e6 Nf3 a6 *

[ECO "E10"]
[Opening "Döry defence"]

d4 Nf6 c4 e6 Nf3 Ne4 *

[ECO "E11"]
[Opening "Bogo-Indian defence"]

d4 Nf6 c4 e6 Nf3 Bb4+ *

[ECO "E11"]
[Opening "Bogo-Indian defence, Grünfeld variation"]

d4 Nf6 c4 e6 Nf3 Bb4+ Nbd2 *

[ECO "E11"]
[Opening "Bogo-Indian defence, Nimzovich variation"]

d4 Nf6 c4 e6 Nf3 Bb4+ Bd2 Qe7 *

[ECO "E11"]
[Opening "Bogo-Indian defence, Monticelli trap"]

d4 Nf6 c4 e6 Nf3 Bb4+ Bd2 Bxd2+ Qxd2 b6 g3 Bb7 Bg2 O-O Nc3 Ne4 Qc2 Nxc3 Ng5 *

[ECO "E12"]
[Opening "Queen's Indian defence"]

d4 Nf6 c4 e6 Nf3 b6 *

[ECO "E12"]
[Opening "Queen's Indian"]
[Variation "Miles variation"]

d4 Nf6 c4 e6 Nf3 b6 Bf4 *

[ECO "E12"]
[Opening "Queen's Indian"]
[Variation "Petrosian system"]

d4 Nf6 c4 e6 Nf3 b6 a3 *

[ECO "E12"]
[Opening "Queen's Indian"]
[Variation "4.Nc3"]

d4 Nf6 c4 e6 Nf3 b6 Nc3 *

[ECO "E12"]
[Opening "Queen's Indian"]
[Variation "4.Nc3, Botvinnik variation"]

d4 Nf6 c4 e6 Nf3 b6 Nc3 Bb7 Bg5 h6 Bh4 g5 Bg3 Nh5 *

[ECO "E13"]
[Opening "Queen's Indian"]
[Variation "4.Nc3, main line"]

d4 Nf6 c4 e6 Nf3 b6 Nc3 Bb7 Bg5 h6 Bh4 Bb4 *

[ECO "E14"]
[Opening "Queen's Indian"]
[Variation "4.e3"]

d4 Nf6 c4 e6 Nf3 b6 e3 *

[ECO "E14"]
[Opening "Queen's Indian"]
[Variation "Averbakh variation"]

d4 Nf6 c4 e6 Nf3 b6 e3 Bb7 Bd3 c5 O-O Be7 b3 O-O Bb2 cxd4 Nxd4 *

[ECO "E15"]
[Opening "Queen's Indian"]
[Variation "4.g3"]

d4 Nf6 c4 e6 Nf3 b6 g3 *

[ECO "E15"]
[Opening "Queen's Indian"]
[Variation "Nimzovich variation (exaggerated fianchetto)"]

d4 Nf6 c4 e6 Nf3 b6 g3 Ba6 *

[ECO "E15"]
[Opening "Queen's Indian"]
[Variation "4.g3 Bb7"]

d4 Nf6 c4 e6 Nf3 b6 g3 Bb7 *

[ECO "E15"]
[Opening "Queen's Indian"]
[Variation "Rubinstein variation"]

d4 Nf6 c4 e6 Nf3 b6 g3 Bb7 Bg2 c5 d5 exd5 Nh4 *

[ECO "E15"]
[Opening "Queen's Indian"]
[Variation "Buerger variation"]

d4 Nf6 c4 e6 Nf3 b6 g3 Bb7 Bg2 c5 d5 exd5 Ng5 *

[ECO "E16"]
[Opening "Queen's Indian"]
[Variation "Capablanca variation"]

d4 Nf6 c4 e6 Nf3 b6 g3 Bb7 Bg2 Bb4+ *

[ECO "E16"]
[Opening "Queen's Indian"]
[Variation "Yates variation"]

d4 Nf6 c4 e6 Nf3 b6 g3 Bb7 Bg2 Bb4+ Bd2 a5 *

[ECO "E16"]
[Opening "Queen's Indian"]
[Variation "Riumin variation"]

d4 Nf6 c4 e6 Nf3 b6 g3 Bb7 Bg2 Bb4+ Bd2 Be7 *

[ECO "E17"]
[Opening "Queen's Indian"]
[Variation "5.Bg2 Be7"]

d4 Nf6 c4 e6 Nf3 b6 g3 Bb7 Bg2 Be7 *

[ECO "E17"]
[Opening "Queen's Indian"]
[Variation "anti-Queen's Indian system"]

d4 Nf6 c4 e6 Nf3 b6 g3 Bb7 Bg2 Be7 Nc3 *

[ECO "E17"]
[Opening "Queen's Indian"]
[Variation "Opočenský variation"]

d4 Nf6 c4 e6 Nf3 b6 g3 Bb7 Bg2 Be7 Nc3 Ne4 Bd2 *

[ECO "E17"]
[Opening "Queen's Indian"]
[Variation "old main line, 6.O-O"]

d4 Nf6 c4 e6 Nf3 b6 g3 Bb7 Bg2 Be7 O-O *

[ECO "E17"]
[Opening "Queen's Indian"]
[Variation "Euwe variation"]

d4 Nf6 c4 e6 Nf3 b6 g3 Bb7 Bg2 Be7 O-O O-O b3 *

[ECO "E18"]
[Opening "Queen's Indian"]
[Variation "old main line, 7.Nc3"]

d4 Nf6 c4 e6 Nf3 b6 g3 Bb7 Bg2 Be7 O-O O-O Nc3 *

[ECO "E19"]
[Opening "Queen's Indian"]
[Variation "old main line, 9.Qxc3"]

d4 Nf6 c4 e6 Nf3 b6 g3 Bb7 Bg2 Be7 O-O O-O Nc3 Ne4 Qc2 Nxc3 Qxc3 *

[ECO "E20"]
[Opening "Nimzo-Indian defence"]

d4 Nf6 c4 e6 Nc3 Bb4 *

[ECO "E20"]
[Opening "Nimzo-Indian"]
[Variation "Kmoch variation"]

d4 Nf6 c4 e6 Nc3 Bb4 f3 *

[ECO "E20"]
[Opening "Nimzo-Indian"]
[Variation "Mikenas attack"]

d4 Nf6 c4 e6 Nc3 Bb4 Qd3 *

[ECO "E20"]
[Opening "Nimzo-Indian"]
[Variation "Romanishin-Kasparov (Steiner) system"]

d4 Nf6 c4 e6 Nc3 Bb4 g3 *

[ECO "E21"]
[Opening "Nimzo-Indian"]
[Variation "three knights variation"]

d4 Nf6 c4 e6 Nc3 Bb4 Nf3 *

[ECO "E21"]
[Opening "Nimzo-Indian"]
[Variation "three knights, Korchnoi variation"]

d4 Nf6 c4 e6 Nc3 Bb4 Nf3 c5 d5 *

[ECO "E21"]
[Opening "Nimzo-Indian"]
[Variation "three knights, Euwe variation"]

d4 Nf6 c4 e6 Nc3 Bb4 Nf3 c5 d5 Ne4 *

[ECO "E22"]
[Opening "Nimzo-Indian"]
[Variation "Spielmann variation"]

d4 Nf6 c4 e6 Nc3 Bb4 Qb3 *

[ECO "E23"]
[Opening "Nimzo-Indian"]
[Variation "Spielmann, 4...c5, 5.dc Nc6"]

d4 Nf6 c4 e6 Nc3 Bb4 Qb3 c5 dxc5 Nc6 *

[ECO "E23"]
[Opening "Nimzo-Indian"]
[Variation "Spielmann, Karlsbad variation"]

d4 Nf6 c4 e6 Nc3 Bb4 Qb3 c5 dxc5 Nc6 Nf3 Ne4 Bd2 Nxd2 *

[ECO "E23"]
[Opening "Nimzo-Indian"]
[Variation "Spielmann, San Remo variation"]

d4 Nf6 c4 e6 Nc3 Bb4 Qb3 c5 dxc5 Nc6 Nf3 Ne4 Bd2 Nxc5 *

[ECO "E23"]
[Opening "Nimzo-Indian"]
[Variation "Spielmann, Ståhlberg variation"]

d4 Nf6 c4 e6 Nc3 Bb4 Qb3 c5 dxc5 Nc6 Nf3 Ne4 Bd2 Nxc5 Qc2 f5 g3 *

[ECO "E24"]
[Opening "Nimzo-Indian"]
[Variation "Sämisch variation"]

d4 Nf6 c4 e6 Nc3 Bb4 a3 Bxc3+ bxc3 *

[ECO "E24"]
[Opening "Nimzo-Indian"]
[Variation "Sämisch, Botvinnik variation"]

d4 Nf6 c4 e6 Nc3 Bb4 a3 Bxc3+ bxc3 c5 f3 d5 e3 O-O cxd5 Nxd5 *

[ECO "E25"]
[Opening "Nimzo-Indian"]
[Variation "Sämisch variation"]

d4 Nf6 c4 e6 Nc3 Bb4 a3 Bxc3+ bxc3 c5 f3 d5 cxd5 *

[ECO "E25"]
[Opening "Nimzo-Indian"]
[Variation "Sämisch, Keres variation"]

d4 Nf6 c4 e6 Nc3 Bb4 a3 Bxc3+ bxc3 c5 f3 d5 cxd5 Nxd5 dxc5 *

[ECO "E25"]
[Opening "Nimzo-Indian"]
[Variation "Sämisch, Romanovsky variation"]

d4 Nf6 c4 e6 Nc3 Bb4 a3 Bxc3+ bxc3 c5 f3 d5 cxd5 Nxd5 dxc5 f5 *

[ECO "E26"]
[Opening "Nimzo-Indian"]
[Variation "Sämisch variation"]

d4 Nf6 c4 e6 Nc3 Bb4 a3 Bxc3+ bxc3 c5 e3 *

[ECO "E26"]
[Opening "Nimzo-Indian"]
[Variation "Sämisch, O'Kelly variation"]

d4 Nf6 c4 e6 Nc3 Bb4 a3 Bxc3+ bxc3 c5 e3 b6 *

[ECO "E27"]
[Opening "Nimzo-Indian"]
[Variation "Sämisch variation"]

d4 Nf6 c4 e6 Nc3 Bb4 a3 Bxc3+ bxc3 O-O *

[ECO "E28"]
[Opening "Nimzo-Indian"]
[Variation "Sämisch variation"]

d4 Nf6 c4 e6 Nc3 Bb4 a3 Bxc3+ bxc3 O-O e3 *

[ECO "E29"]
[Opening "Nimzo-Indian"]
[Variation "Sämisch, main line"]

d4 Nf6 c4 e6 Nc3 Bb4 a3 Bxc3+ bxc3 O-O e3 c5 Bd3 Nc6 *

[ECO "E29"]
[Opening "Nimzo-Indian"]
[Variation "Sämisch, Capablanca variation"]

d4 Nf6 c4 e6 Nc3 Bb4 a3 Bxc3+ bxc3 O-O e3 c5 Bd3 Nc6 Ne2 b6 e4 Ne8 *

[ECO "E30"]
[Opening "Nimzo-Indian"]
[Variation "Leningrad variation"]

d4 Nf6 c4 e6 Nc3 Bb4 Bg5 *

[ECO "E30"]
[Opening "Nimzo-Indian"]
[Variation "Leningrad, ...b5 gambit"]

d4 Nf6 c4 e6 Nc3 Bb4 Bg5 h6 Bh4 c5 d5 b5 *

[ECO "E31"]
[Opening "Nimzo-Indian"]
[Variation "Leningrad, main line"]

d4 Nf6 c4 e6 Nc3 Bb4 Bg5 h6 Bh4 c5 d5 d6 *

[ECO "E32"]
[Opening "Nimzo-Indian"]
[Variation "classical variation"]

d4 Nf6 c4 e6 Nc3 Bb4 Qc2 *

[ECO "E32"]
[Opening "Nimzo-Indian"]
[Variation "classical, Adorjan gambit"]

d4 Nf6 c4 e6 Nc3 Bb4 Qc2 O-O a3 Bxc3+ Qxc3 b5 *

[ECO "E33"]
[Opening "Nimzo-Indian"]
[Variation "classical, 4...Nc6"]

d4 Nf6 c4 e6 Nc3 Bb4 Qc2 Nc6 *

[ECO "E33"]
[Opening "Nimzo-Indian"]
[Variation "classical, Milner-Barry (Zurich) variation"]

d4 Nf6 c4 e6 Nc3 Bb4 Qc2 Nc6 Nf3 d6 *

[ECO "E34"]
[Opening "Nimzo-Indian"]
[Variation "classical, Noa variation"]

d4 Nf6 c4 e6 Nc3 Bb4 Qc2 d5 *

[ECO "E35"]
[Opening "Nimzo-Indian"]
[Variation "classical, Noa variation, 5.cd ed"]

d4 Nf6 c4 e6 Nc3 Bb4 Qc2 d5 cxd5 exd5 *

[ECO "E36"]
[Opening "Nimzo-Indian"]
[Variation "classical, Noa variation, 5.a3"]

d4 Nf6 c4 e6 Nc3 Bb4 Qc2 d5 a3 *

[ECO "E36"]
[Opening "Nimzo-Indian"]
[Variation "classical, Botvinnik variation"]

d4 Nf6 c4 e6 Nc3 Bb4 Qc2 d5 a3 Bxc3+ Qxc3 Nc6 *

[ECO "E36"]
[Opening "Nimzo-Indian"]
[Variation "classical, Noa variation, main line"]

d4 Nf6 c4 e6 Nc3 Bb4 Qc2 d5 a3 Bxc3+ Qxc3 Ne4 *

[ECO "E37"]
[Opening "Nimzo-Indian"]
[Variation "classical, Noa variation, main line, 7.Qc2"]

d4 Nf6 c4 e6 Nc3 Bb4 Qc2 d5 a3 Bxc3+ Qxc3 Ne4 Qc2 *

[ECO "E37"]
[Opening "Nimzo-Indian"]
[Variation "classical, San Remo variation"]

d4 Nf6 c4 e6 Nc3 Bb4 Qc2 d5 a3 Bxc3+ Qxc3 Ne4 Qc2 Nc6 e3 e5 *

[ECO "E38"]
[Opening "Nimzo-Indian"]
[Variation "classical, 4...c5"]

d4 Nf6 c4 e6 Nc3 Bb4 Qc2 c5 *

[ECO "E39"]
[Opening "Nimzo-Indian"]
[Variation "classical, Pirc variation"]

d4 Nf6 c4 e6 Nc3 Bb4 Qc2 c5 dxc5 O-O *

[ECO "E40"]
[Opening "Nimzo-Indian"]
[Variation "4.e3"]

d4 Nf6 c4 e6 Nc3 Bb4 e3 *

[ECO "E40"]
[Opening "Nimzo-Indian"]
[Variation "4.e3, Taimanov variation"]

d4 Nf6 c4 e6 Nc3 Bb4 e3 Nc6 *

[ECO "E41"]
[Opening "Nimzo-Indian"]
[Variation "4.e3 c5"]

d4 Nf6 c4 e6 Nc3 Bb4 e3 c5 *

[ECO "E41"]
[Opening "Nimzo-Indian"]
[Variation "e3, Hübner variation"]

d4 Nf6 c4 e6 Nc3 Bb4 e3 c5 Bd3 Nc6 Nf3 Bxc3+ bxc3 d6 *

[ECO "E42"]
[Opening "Nimzo-Indian"]
[Variation "4.e3 c5, 5.Ne2 (Rubinstein)"]

d4 Nf6 c4 e6 Nc3 Bb4 e3 c5 Ne2 *

[ECO "E43"]
[Opening "Nimzo-Indian"]
[Variation "Fischer variation"]

d4 Nf6 c4 e6 Nc3 Bb4 e3 b6 *

[ECO "E44"]
[Opening "Nimzo-Indian"]
[Variation "Fischer variation, 5.Ne2"]

d4 Nf6 c4 e6 Nc3 Bb4 e3 b6 Ne2 *

[ECO "E45"]
[Opening "Nimzo-Indian"]
[Variation "4.e3, Bronstein (Byrne) variation"]

d4 Nf6 c4 e6 Nc3 Bb4 e3 b6 Ne2 Ba6 *

[ECO "E46"]
[Opening "Nimzo-Indian"]
[Variation "4.e3 O-O"]

d4 Nf6 c4 e6 Nc3 Bb4 e3 O-O *

[ECO "E46"]
[Opening "Nimzo-Indian"]
[Variation "Reshevsky variation"]

d4 Nf6 c4 e6 Nc3 Bb4 e3 O-O Ne2 *

[ECO "E46"]
[Opening "Nimzo-Indian"]
[Variation "Simagin variation"]

d4 Nf6 c4 e6 Nc3 Bb4 e3 O-O Ne2 d5 a3 Bd6 *

[ECO "E47"]
[Opening "Nimzo-Indian"]
[Variation "4.e3 O-O, 5.Bd3"]

d4 Nf6 c4 e6 Nc3 Bb4 e3 O-O Bd3 *

[ECO "E48"]
[Opening "Nimzo-Indian"]
[Variation "4.e3 O-O, 5.Bd3 d5"]

d4 Nf6 c4 e6 Nc3 Bb4 e3 O-O Bd3 d5 *

[ECO "E49"]
[Opening "Nimzo-Indian"]
[Variation "4.e3, Botvinnik system"]

d4 Nf6 c4 e6 Nc3 Bb4 e3 O-O Bd3 d5 a3 Bxc3+ bxc3 *

[ECO "E50"]
[Opening "Nimzo-Indian"]
[Variation "4.e3 e8g8, 5.Nf3, without ...d5"]

d4 Nf6 c4 e6 Nc3 Bb4 e3 O-O Nf3 *

[ECO "E51"]
[Opening "Nimzo-Indian"]
[Variation "4.e3 e8g8, 5.Nf3 d7d5"]

d4 Nf6 c4 e6 Nc3 Bb4 e3 O-O Nf3 d5 *

[ECO "E51"]
[Opening "Nimzo-Indian"]
[Variation "4.e3, Ragozin variation"]

d4 Nf6 c4 e6 Nc3 Bb4 e3 O-O Nf3 d5 Bd3 Nc6 O-O dxc4 *

[ECO "E52"]
[Opening "Nimzo-Indian"]
[Variation "4.e3, main line with ...b6"]

d4 Nf6 c4 e6 Nc3 Bb4 e3 O-O Nf3 d5 Bd3 b6 *

[ECO "E53"]
[Opening "Nimzo-Indian"]
[Variation "4.e3, main line with ...c5"]

d4 Nf6 c4 e6 Nc3 Bb4 e3 O-O Nf3 d5 Bd3 c5 *

[ECO "E53"]
[Opening "Nimzo-Indian"]
[Variation "4.e3, Keres variation"]

d4 Nf6 c4 e6 Nc3 Bb4 e3 O-O Nf3 d5 Bd3 c5 O-O b6 *

[ECO "E53"]
[Opening "Nimzo-Indian"]
[Variation "4.e3, Gligoric system with 7...Nbd7"]

d4 Nf6 c4 e6 Nc3 Bb4 e3 O-O Nf3 d5 Bd3 c5 O-O Nbd7 *

[ECO "E54"]
[Opening "Nimzo-Indian"]
[Variation "4.e3, Gligoric system with 7...dc"]

d4 Nf6 c4 e6 Nc3 Bb4 e3 O-O Nf3 d5 Bd3 c5 O-O dxc4 Bxc4 *

[ECO "E54"]
[Opening "Nimzo-Indian"]
[Variation "4.e3, Gligoric system, Smyslov variation"]

d4 Nf6 c4 e6 Nc3 Bb4 e3 O-O Nf3 d5 Bd3 c5 O-O dxc4 Bxc4 Qe7 *

[ECO "E55"]
[Opening "Nimzo-Indian"]
[Variation "4.e3, Gligoric system, Bronstein variation"]

d4 Nf6 c4 e6 Nc3 Bb4 e3 O-O Nf3 d5 Bd3 c5 O-O dxc4 Bxc4 Nbd7 *

[ECO "E56"]
[Opening "Nimzo-Indian"]
[Variation "4.e3, main line with 7...Nc6"]

d4 Nf6 c4 e6 Nc3 Bb4 e3 O-O Nf3 d5 Bd3 c5 O-O Nc6 *

[ECO "E57"]
[Opening "Nimzo-Indian"]
[Variation "4.e3, main line with 8...dc and 9...cd"]

d4 Nf6 c4 e6 Nc3 Bb4 e3 O-O Nf3 d5 Bd3 c5 O-O Nc6 a3 dxc4 Bxc4 cxd4 *

[ECO "E58"]
[Opening "Nimzo-Indian"]
[Variation "4.e3, main line with 8...Bxc3"]

d4 Nf6 c4 e6 Nc3 Bb4 e3 O-O Nf3 d5 Bd3 c5 O-O Nc6 a3 Bxc3 bxc3 *

[ECO "E59"]
[Opening "Nimzo-Indian"]
[Variation "4.e3, main line"]

d4 Nf6 c4 e6 Nc3 Bb4 e3 O-O Nf3 d5 Bd3 c5 O-O Nc6 a3 Bxc3 bxc3 dxc4 Bxc4 *

[ECO "E60"]
[Opening "King's Indian defence"]

d4 Nf6 c4 g6 *

[ECO "E60"]
[Opening "King's Indian, 3.Nf3"]

d4 Nf6 c4 g6 Nf3 *

[ECO "E60"]
[Opening "Queen's pawn"]
[Variation "Mengarini attack"]

d4 Nf6 c4 g6 Qc2 *

[ECO "E60"]
[Opening "King's Indian"]
[Variation "Anti-Grünfeld"]

d4 Nf6 c4 g6 d5 *

[ECO "E60"]
[Opening "King's Indian"]
[Variation "Danube gambit"]

d4 Nf6 c4 g6 d5 b5 *

[ECO "E60"]
[Opening "King's Indian"]
[Variation "3.g3"]

d4 Nf6 c4 g6 g3 *

[ECO "E60"]
[Opening "King's Indian"]
[Variation "3.g3, counterthrust variation"]

d4 Nf6 c4 g6 g3 Bg7 Bg2 d5 *

[ECO "E61"]
[Opening "King's Indian defence, 3.Nc3"]

d4 Nf6 c4 g6 Nc3 *

[ECO "E61"]
[Opening "King's Indian"]
[Variation "Smyslov system"]

d4 Nf6 c4 g6 Nc3 Bg7 Nf3 d6 Bg5 *

[ECO "E62"]
[Opening "King's Indian"]
[Variation "fianchetto variation"]

d4 Nf6 c4 g6 Nc3 Bg7 Nf3 d6 g3 *

[ECO "E62"]
[Opening "King's Indian"]
[Variation "fianchetto, Larsen system"]

d4 Nf6 c4 g6 Nc3 Bg7 Nf3 d6 g3 O-O Bg2 c6 O-O Bf5 *

[ECO "E62"]
[Opening "King's Indian"]
[Variation "fianchetto, Kavalek (Bronstein) variation"]

d4 Nf6 c4 g6 Nc3 Bg7 Nf3 d6 g3 O-O Bg2 c6 O-O Qa5 *

[ECO "E62"]
[Opening "King's Indian"]
[Variation "fianchetto with ...Nc6"]

d4 Nf6 c4 g6 Nc3 Bg7 Nf3 d6 g3 O-O Bg2 Nc6 *

[ECO "E62"]
[Opening "King's Indian"]
[Variation "fianchetto, Uhlmann (Szabo) variation"]

d4 Nf6 c4 g6 Nc3 Bg7 Nf3 d6 g3 O-O Bg2 Nc6 O-O e5 *

[ECO "E62"]
[Opening "King's Indian"]
[Variation "fianchetto, lesser Simagin (Spassky) variation"]

d4 Nf6 c4 g6 Nc3 Bg7 Nf3 d6 g3 O-O Bg2 Nc6 O-O Bf5 *

[ECO "E62"]
[Opening "King's Indian"]
[Variation "fianchetto, Simagin variation"]

d4 Nf6 c4 g6 Nc3 Bg7 Nf3 d6 g3 O-O Bg2 Nc6 O-O Bg4 *

[ECO "E63"]
[Opening "King's Indian"]
[Variation "fianchetto, Panno variation"]

d4 Nf6 c4 g6 Nc3 Bg7 Nf3 d6 g3 O-O Bg2 Nc6 O-O a6 *

[ECO "E64"]
[Opening "King's Indian"]
[Variation "fianchetto, Yugoslav system"]

d4 Nf6 c4 g6 Nc3 Bg7 Nf3 d6 g3 O-O Bg2 c5 *

[ECO "E65"]
[Opening "King's Indian"]
[Variation "fianchetto, Yugoslav, 7.O-O"]

d4 Nf6 c4 g6 Nc3 Bg7 Nf3 d6 g3 O-O Bg2 c5 O-O *

[ECO "E66"]
[Opening "King's Indian"]
[Variation "fianchetto, Yugoslav Panno"]

d4 Nf6 c4 g6 Nc3 Bg7 Nf3 d6 g3 O-O Bg2 c5 O-O Nc6 d5 *

[ECO "E67"]
[Opening "King's Indian"]
[Variation "fianchetto with ...Nd7"]

d4 Nf6 c4 g6 Nc3 Bg7 Nf3 d6 g3 O-O Bg2 Nbd7 *

[ECO "E67"]
[Opening "King's Indian"]
[Variation "fianchetto, classical variation"]

d4 Nf6 c4 g6 Nc3 Bg7 Nf3 d6 g3 O-O Bg2 Nbd7 O-O e5 *

[ECO "E68"]
[Opening "King's Indian"]
[Variation "fianchetto, classical variation, 8.e4"]

d4 Nf6 c4 g6 Nc3 Bg7 Nf3 d6 g3 O-O Bg2 Nbd7 O-O e5 e4 *

[ECO "E69"]
[Opening "King's Indian"]
[Variation "fianchetto, classical main line"]

d4 Nf6 c4 g6 Nc3 Bg7 Nf3 d6 g3 O-O Bg2 Nbd7 O-O e5 e4 c6 h3 *

[ECO "E70"]
[Opening "King's Indian"]
[Variation "4.e4"]

d4 Nf6 c4 g6 Nc3 Bg7 e4 *

[ECO "E70"]
[Opening "King's Indian"]
[Variation "Kramer system"]

d4 Nf6 c4 g6 Nc3 Bg7 e4 d6 Nge2 *

[ECO "E70"]
[Opening "King's Indian"]
[Variation "accelerated Averbakh system"]

d4 Nf6 c4 g6 Nc3 Bg7 e4 d6 Bg5 *

[ECO "E71"]
[Opening "King's Indian"]
[Variation "Makagonov system (5.h3)"]

d4 Nf6 c4 g6 Nc3 Bg7 e4 d6 h3 *

[ECO "E72"]
[Opening "King's Indian with e4 & g3"]

d4 Nf6 c4 g6 Nc3 Bg7 e4 d6 g3 *

[ECO "E72"]
[Opening "King's Indian"]
[Variation "Pomar system"]

d4 Nf6 c4 g6 Nc3 Bg7 e4 d6 g3 O-O Bg2 e5 Nge2 *

[ECO "E73"]
[Opening "King's Indian"]
[Variation "5.Be2"]

d4 Nf6 c4 g6 Nc3 Bg7 e4 d6 Be2 *

[ECO "E73"]
[Opening "King's Indian"]
[Variation "Semi-Averbakh system"]

d4 Nf6 c4 g6 Nc3 Bg7 e4 d6 Be2 O-O Be3 *

[ECO "E73"]
[Opening "King's Indian"]
[Variation "Averbakh system"]

d4 Nf6 c4 g6 Nc3 Bg7 e4 d6 Be2 O-O Bg5 *

[ECO "E74"]
[Opening "King's Indian"]
[Variation "Averbakh, 6...c5"]

d4 Nf6 c4 g6 Nc3 Bg7 e4 d6 Be2 O-O Bg5 c5 *

[ECO "E75"]
[Opening "King's Indian"]
[Variation "Averbakh, main line"]

d4 Nf6 c4 g6 Nc3 Bg7 e4 d6 Be2 O-O Bg5 c5 d5 e6 *

[ECO "E76"]
[Opening "King's Indian"]
[Variation "Four pawns attack"]

d4 Nf6 c4 g6 Nc3 Bg7 e4 d6 f4 *

[ECO "E76"]
[Opening "King's Indian"]
[Variation "Four pawns attack, dynamic line"]

d4 Nf6 c4 g6 Nc3 Bg7 e4 d6 f4 O-O Nf3 c5 d5 *

[ECO "E77"]
[Opening "King's Indian"]
[Variation "Four pawns attack, 6.Be2"]

d4 Nf6 c4 g6 Nc3 Bg7 e4 d6 f4 O-O Be2 *

[ECO "E77"]
[Opening "King's Indian"]
[Variation "Six pawns attack"]

d4 Nf6 c4 g6 Nc3 Bg7 e4 d6 f4 O-O Be2 c5 d5 e6 dxe6 fxe6 g4 Nc6 h4 *

[ECO "E77"]
[Opening "King's Indian"]
[Variation "Four pawns attack"]

d4 Nf6 c4 g6 Nc3 Bg7 e4 d6 f4 O-O Be2 c5 d5 e6 Nf3 *

[ECO "E77"]
[Opening "King's Indian"]
[Variation "Four pawns attack, Florentine gambit"]

d4 Nf6 c4 g6 Nc3 Bg7 e4 d6 f4 O-O Be2 c5 d5 e6 Nf3 exd5 e5 *

[ECO "E78"]
[Opening "King's Indian"]
[Variation "Four pawns attack, with Be2 and Nf3"]

d4 Nf6 c4 g6 Nc3 Bg7 e4 d6 f4 O-O Be2 c5 Nf3 *

[ECO "E79"]
[Opening "King's Indian"]
[Variation "Four pawns attack, main line"]

d4 Nf6 c4 g6 Nc3 Bg7 e4 d6 f4 O-O Be2 c5 Nf3 cxd4 Nxd4 Nc6 Be3 *

[ECO "E80"]
[Opening "King's Indian"]
[Variation "Sämisch variation"]

d4 Nf6 c4 g6 Nc3 Bg7 e4 d6 f3 *

[ECO "E81"]
[Opening "King's Indian"]
[Variation "Sämisch, 5...O-O"]

d4 Nf6 c4 g6 Nc3 Bg7 e4 d6 f3 O-O *

[ECO "E81"]
[Opening "King's Indian"]
[Variation "Sämisch, Byrne variation"]

d4 Nf6 c4 g6 Nc3 Bg7 e4 d6 f3 O-O Be3 c6 Bd3 a6 *

[ECO "E82"]
[Opening "King's Indian"]
[Variation "Sämisch, double fianchetto variation"]

d4 Nf6 c4 g6 Nc3 Bg7 e4 d6 f3 O-O Be3 b6 *

[ECO "E83"]
[Opening "King's Indian"]
[Variation "Sämisch, 6...Nc6"]

d4 Nf6 c4 g6 Nc3 Bg7 e4 d6 f3 O-O Be3 Nc6 *

[ECO "E83"]
[Opening "King's Indian"]
[Variation "Sämisch, Ruban variation"]

d4 Nf6 c4 g6 Nc3 Bg7 e4 d6 f3 O-O Be3 Nc6 Nge2 Rb8 *

[ECO "E83"]
[Opening "King's Indian"]
[Variation "Sämisch, Panno formation"]

d4 Nf6 c4 g6 Nc3 Bg7 e4 d6 f3 O-O Be3 Nc6 Nge2 a6 *

[ECO "E84"]
[Opening "King's Indian"]
[Variation "Sämisch, Panno main line"]

d4 Nf6 c4 g6 Nc3 Bg7 e4 d6 f3 O-O Be3 Nc6 Nge2 a6 Qd2 Rb8 *

[ECO "E85"]
[Opening "King's Indian"]
[Variation "Sämisch, orthodox variation"]

d4 Nf6 c4 g6 Nc3 Bg7 e4 d6 f3 O-O Be3 e5 *

[ECO "E86"]
[Opening "King's Indian"]
[Variation "Sämisch, orthodox, 7.Nge2 c6"]

d4 Nf6 c4 g6 Nc3 Bg7 e4 d6 f3 O-O Be3 e5 Nge2 c6 *

[ECO "E87"]
[Opening "King's Indian"]
[Variation "Sämisch, orthodox, 7.d5"]

d4 Nf6 c4 g6 Nc3 Bg7 e4 d6 f3 O-O Be3 e5 d5 *

[ECO "E87"]
[Opening "King's Indian"]
[Variation "Sämisch, orthodox, Bronstein variation"]

d4 Nf6 c4 g6 Nc3 Bg7 e4 d6 f3 O-O Be3 e5 d5 Nh5 Qd2 Qh4+ g3 Nxg3 Qf2 Nxf1 Qxh4 Nxe3 Ke2 Nxc4 *

[ECO "E88"]
[Opening "King's Indian"]
[Variation "Sämisch, orthodox, 7.d5 c6"]

d4 Nf6 c4 g6 Nc3 Bg7 e4 d6 f3 O-O Be3 e5 d5 c6 *

[ECO "E89"]
[Opening "King's Indian"]
[Variation "Sämisch, orthodox main line"]

d4 Nf6 c4 g6 Nc3 Bg7 e4 d6 f3 O-O Be3 e5 d5 c6 Nge2 cxd5 *

[ECO "E90"]
[Opening "King's Indian"]
[Variation "5.Nf3"]

d4 Nf6 c4 g6 Nc3 Bg7 e4 d6 Nf3 *

[ECO "E90"]
[Opening "King's Indian"]
[Variation "Larsen variation"]

d4 Nf6 c4 g6 Nc3 Bg7 e4 d6 Nf3 O-O Be3 *

[ECO "E90"]
[Opening "King's Indian"]
[Variation "Zinnowitz variation"]

d4 Nf6 c4 g6 Nc3 Bg7 e4 d6 Nf3 O-O Bg5 *

[ECO "E91"]
[Opening "King's Indian"]
[Variation "6.Be2"]

d4 Nf6 c4 g6 Nc3 Bg7 e4 d6 Nf3 O-O Be2 *

[ECO "E91"]
[Opening "King's Indian"]
[Variation "Kazakh variation"]

d4 Nf6 c4 g6 Nc3 Bg7 e4 d6 Nf3 O-O Be2 Na6 *

[ECO "E92"]
[Opening "King's Indian"]
[Variation "classical variation"]

d4 Nf6 c4 g6 Nc3 Bg7 e4 d6 Nf3 O-O Be2 e5 *

[ECO "E92"]
[Opening "King's Indian"]
[Variation "Andersson variation"]

d4 Nf6 c4 g6 Nc3 Bg7 e4 d6 Nf3 O-O Be2 e5 dxe5 *

[ECO "E92"]
[Opening "King's Indian"]
[Variation "Gligoric-Taimanov system"]

d4 Nf6 c4 g6 Nc3 Bg7 e4 d6 Nf3 O-O Be2 e5 Be3 *

[ECO "E92"]
[Opening "King's Indian"]
[Variation "Petrosian system"]

d4 Nf6 c4 g6 Nc3 Bg7 e4 d6 Nf3 O-O Be2 e5 d5 *

[ECO "E92"]
[Opening "King's Indian"]
[Variation "Petrosian system, Stein variation"]

d4 Nf6 c4 g6 Nc3 Bg7 e4 d6 Nf3 O-O Be2 e5 d5 a5 *

[ECO "E93"]
[Opening "King's Indian"]
[Variation "Petrosian system, main line"]

d4 Nf6 c4 g6 Nc3 Bg7 e4 d6 Nf3 O-O Be2 e5 d5 Nbd7 *

[ECO "E93"]
[Opening "King's Indian"]
[Variation "Petrosian system, Keres variation"]

d4 Nf6 c4 g6 Nc3 Bg7 e4 d6 Nf3 O-O Be2 e5 d5 Nbd7 Bg5 h6 Bh4 g5 Bg3 Nh5 h4 *

[ECO "E94"]
[Opening "King's Indian"]
[Variation "orthodox variation"]

d4 Nf6 c4 g6 Nc3 Bg7 e4 d6 Nf3 O-O Be2 e5 O-O *

[ECO "E94"]
[Opening "King's Indian"]
[Variation "orthodox, Donner variation"]

d4 Nf6 c4 g6 Nc3 Bg7 e4 d6 Nf3 O-O Be2 e5 O-O c6 *

[ECO "E94"]
[Opening "King's Indian"]
[Variation "orthodox, 7...Nbd7"]

d4 Nf6 c4 g6 Nc3 Bg7 e4 d6 Nf3 O-O Be2 e5 O-O Nbd7 *

[ECO "E95"]
[Opening "King's Indian"]
[Variation "orthodox, 7...Nbd7, 8.Re1"]

d4 Nf6 c4 g6 Nc3 Bg7 e4 d6 Nf3 O-O Be2 e5 O-O Nbd7 Re1 *

[ECO "E96"]
[Opening "King's Indian"]
[Variation "orthodox, 7...Nbd7, main line"]

d4 Nf6 c4 g6 Nc3 Bg7 e4 d6 Nf3 O-O Be2 e5 O-O Nbd7 Re1 c6 Bf1 a5 *

[ECO "E97"]
[Opening "King's Indian"]
[Variation "orthodox, Aronin-Taimanov variation (Yugoslav attack / Mar del Plata variation)"]

d4 Nf6 c4 g6 Nc3 Bg7 e4 d6 Nf3 O-O Be2 e5 O-O Nc6 *

[ECO "E97"]
[Opening "King's Indian"]
[Variation "orthodox, Aronin-Taimanov, bayonet attack"]

d4 Nf6 c4 g6 Nc3 Bg7 e4 d6 Nf3 O-O Be2 e5 O-O Nc6 d5 Ne7 b4 *

[ECO "E98"]
[Opening "King's Indian"]
[Variation "orthodox, Aronin-Taimanov, 9.Ne1"]

d4 Nf6 c4 g6 Nc3 Bg7 e4 d6 Nf3 O-O Be2 e5 O-O Nc6 d5 Ne7 Ne1 *

[ECO "E99"]
[Opening "King's Indian"]
[Variation "orthodox, Aronin-Taimanov, main line"]

d4 Nf6 c4 g6 Nc3 Bg7 e4 d6 Nf3 O-O Be2 e5 O-O Nc6 d5 Ne7 Ne1 Nd7 f3 f5 *

[ECO "E99"]
[Opening "King's Indian"]
[Variation "orthodox, Aronin-Taimanov, Benko attack"]

d4 Nf6 c4 g6 Nc3 Bg7 e4 d6 Nf3 O-O Be2 e5 O-O Nc6 d5 Ne7 Ne1 Nd7 f3 f5 g4 *

