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Update to Stockfish 11

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This commit is contained in:
Peter Osterlund
2020-01-18 08:00:03 +01:00
parent c19a3b3777
commit 9c1d76faa1
38 changed files with 1777 additions and 1605 deletions
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10
DroidFishApp/src/main/cpp/stockfish/benchmark.cpp
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@@ -2,7 +2,7 @@
Stockfish, a UCI chess playing engine derived from Glaurung 2.1
Copyright (C) 2004-2008 Tord Romstad (Glaurung author)
Copyright (C) 2008-2015 Marco Costalba, Joona Kiiski, Tord Romstad
Copyright (C) 2015-2019 Marco Costalba, Joona Kiiski, Gary Linscott, Tord Romstad
Copyright (C) 2015-2020 Marco Costalba, Joona Kiiski, Gary Linscott, Tord Romstad
Stockfish is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
@@ -61,6 +61,10 @@ const vector<string> Defaults = {
"1r3k2/4q3/2Pp3b/3Bp3/2Q2p2/1p1P2P1/1P2KP2/3N4 w - - 0 1",
"6k1/4pp1p/3p2p1/P1pPb3/R7/1r2P1PP/3B1P2/6K1 w - - 0 1",
"8/3p3B/5p2/5P2/p7/PP5b/k7/6K1 w - - 0 1",
"5rk1/q6p/2p3bR/1pPp1rP1/1P1Pp3/P3B1Q1/1K3P2/R7 w - - 93 90",
"4rrk1/1p1nq3/p7/2p1P1pp/3P2bp/3Q1Bn1/PPPB4/1K2R1NR w - - 40 21",
"r3k2r/3nnpbp/q2pp1p1/p7/Pp1PPPP1/4BNN1/1P5P/R2Q1RK1 w kq - 0 16",
"3Qb1k1/1r2ppb1/pN1n2q1/Pp1Pp1Pr/4P2p/4BP2/4B1R1/1R5K b - - 11 40",
// 5-man positions
"8/8/8/8/5kp1/P7/8/1K1N4 w - - 0 1", // Kc2 - mate
@@ -113,7 +117,7 @@ vector<string> setup_bench(const Position& current, istream& is) {
string fenFile = (is >> token) ? token : "default";
string limitType = (is >> token) ? token : "depth";
go = "go " + limitType + " " + limit;
go = limitType == "eval" ? "eval" : "go " + limitType + " " + limit;
if (fenFile == "default")
fens = Defaults;
@@ -139,9 +143,9 @@ vector<string> setup_bench(const Position& current, istream& is) {
file.close();
}
list.emplace_back("ucinewgame");
list.emplace_back("setoption name Threads value " + threads);
list.emplace_back("setoption name Hash value " + ttSize);
list.emplace_back("ucinewgame");
for (const string& fen : fens)
if (fen.find("setoption") != string::npos)

8
DroidFishApp/src/main/cpp/stockfish/bitbase.cpp
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@@ -2,7 +2,7 @@
Stockfish, a UCI chess playing engine derived from Glaurung 2.1
Copyright (C) 2004-2008 Tord Romstad (Glaurung author)
Copyright (C) 2008-2015 Marco Costalba, Joona Kiiski, Tord Romstad
Copyright (C) 2015-2019 Marco Costalba, Joona Kiiski, Gary Linscott, Tord Romstad
Copyright (C) 2015-2020 Marco Costalba, Joona Kiiski, Gary Linscott, Tord Romstad
Stockfish is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
@@ -18,7 +18,6 @@
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <algorithm>
#include <cassert>
#include <numeric>
#include <vector>
@@ -28,7 +27,8 @@
namespace {
// There are 24 possible pawn squares: the first 4 files and ranks from 2 to 7
// There are 24 possible pawn squares: files A to D and ranks from 2 to 7.
// Positions with the pawn on files E to H will be mirrored before probing.
constexpr unsigned MAX_INDEX = 2*24*64*64; // stm * psq * wksq * bksq = 196608
// Each uint32_t stores results of 32 positions, one per bit
@@ -44,7 +44,7 @@ namespace {
// bit 13-14: white pawn file (from FILE_A to FILE_D)
// bit 15-17: white pawn RANK_7 - rank (from RANK_7 - RANK_7 to RANK_7 - RANK_2)
unsigned index(Color us, Square bksq, Square wksq, Square psq) {
return wksq | (bksq << 6) | (us << 12) | (file_of(psq) << 13) | ((RANK_7 - rank_of(psq)) << 15);
return int(wksq) | (bksq << 6) | (us << 12) | (file_of(psq) << 13) | ((RANK_7 - rank_of(psq)) << 15);
}
enum Result {

98
DroidFishApp/src/main/cpp/stockfish/bitboard.cpp
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@@ -2,7 +2,7 @@
Stockfish, a UCI chess playing engine derived from Glaurung 2.1
Copyright (C) 2004-2008 Tord Romstad (Glaurung author)
Copyright (C) 2008-2015 Marco Costalba, Joona Kiiski, Tord Romstad
Copyright (C) 2015-2019 Marco Costalba, Joona Kiiski, Gary Linscott, Tord Romstad
Copyright (C) 2015-2020 Marco Costalba, Joona Kiiski, Gary Linscott, Tord Romstad
Stockfish is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
@@ -19,24 +19,16 @@
*/
#include <algorithm>
#include <bitset>
#include "bitboard.h"
#include "misc.h"
uint8_t PopCnt16[1 << 16];
int SquareDistance[SQUARE_NB][SQUARE_NB];
uint8_t SquareDistance[SQUARE_NB][SQUARE_NB];
Bitboard SquareBB[SQUARE_NB];
Bitboard FileBB[FILE_NB];
Bitboard RankBB[RANK_NB];
Bitboard AdjacentFilesBB[FILE_NB];
Bitboard ForwardRanksBB[COLOR_NB][RANK_NB];
Bitboard BetweenBB[SQUARE_NB][SQUARE_NB];
Bitboard LineBB[SQUARE_NB][SQUARE_NB];
Bitboard DistanceRingBB[SQUARE_NB][8];
Bitboard ForwardFileBB[COLOR_NB][SQUARE_NB];
Bitboard PassedPawnMask[COLOR_NB][SQUARE_NB];
Bitboard PawnAttackSpan[COLOR_NB][SQUARE_NB];
Bitboard PseudoAttacks[PIECE_TYPE_NB][SQUARE_NB];
Bitboard PawnAttacks[COLOR_NB][SQUARE_NB];
@@ -49,15 +41,6 @@ namespace {
Bitboard BishopTable[0x1480]; // To store bishop attacks
void init_magics(Bitboard table[], Magic magics[], Direction directions[]);
// popcount16() counts the non-zero bits using SWAR-Popcount algorithm
unsigned popcount16(unsigned u) {
u -= (u >> 1) & 0x5555U;
u = ((u >> 2) & 0x3333U) + (u & 0x3333U);
u = ((u >> 4) + u) & 0x0F0FU;
return (u * 0x0101U) >> 8;
}
}
@@ -86,56 +69,36 @@ const std::string Bitboards::pretty(Bitboard b) {
void Bitboards::init() {
for (unsigned i = 0; i < (1 << 16); ++i)
PopCnt16[i] = (uint8_t) popcount16(i);
PopCnt16[i] = std::bitset<16>(i).count();
for (Square s = SQ_A1; s <= SQ_H8; ++s)
SquareBB[s] = (1ULL << s);
for (File f = FILE_A; f <= FILE_H; ++f)
FileBB[f] = f > FILE_A ? FileBB[f - 1] << 1 : FileABB;
for (Rank r = RANK_1; r <= RANK_8; ++r)
RankBB[r] = r > RANK_1 ? RankBB[r - 1] << 8 : Rank1BB;
for (File f = FILE_A; f <= FILE_H; ++f)
AdjacentFilesBB[f] = (f > FILE_A ? FileBB[f - 1] : 0) | (f < FILE_H ? FileBB[f + 1] : 0);
for (Rank r = RANK_1; r < RANK_8; ++r)
ForwardRanksBB[WHITE][r] = ~(ForwardRanksBB[BLACK][r + 1] = ForwardRanksBB[BLACK][r] | RankBB[r]);
for (Color c = WHITE; c <= BLACK; ++c)
for (Square s = SQ_A1; s <= SQ_H8; ++s)
{
ForwardFileBB [c][s] = ForwardRanksBB[c][rank_of(s)] & FileBB[file_of(s)];
PawnAttackSpan[c][s] = ForwardRanksBB[c][rank_of(s)] & AdjacentFilesBB[file_of(s)];
PassedPawnMask[c][s] = ForwardFileBB [c][s] | PawnAttackSpan[c][s];
}
for (Square s1 = SQ_A1; s1 <= SQ_H8; ++s1)
for (Square s2 = SQ_A1; s2 <= SQ_H8; ++s2)
if (s1 != s2)
{
SquareDistance[s1][s2] = std::max(distance<File>(s1, s2), distance<Rank>(s1, s2));
DistanceRingBB[s1][SquareDistance[s1][s2]] |= s2;
}
SquareDistance[s1][s2] = std::max(distance<File>(s1, s2), distance<Rank>(s1, s2));
int steps[][5] = { {}, { 7, 9 }, { 6, 10, 15, 17 }, {}, {}, {}, { 1, 7, 8, 9 } };
for (Square s = SQ_A1; s <= SQ_H8; ++s)
{
PawnAttacks[WHITE][s] = pawn_attacks_bb<WHITE>(square_bb(s));
PawnAttacks[BLACK][s] = pawn_attacks_bb<BLACK>(square_bb(s));
}
for (Color c = WHITE; c <= BLACK; ++c)
for (PieceType pt : { PAWN, KNIGHT, KING })
for (Square s = SQ_A1; s <= SQ_H8; ++s)
for (int i = 0; steps[pt][i]; ++i)
{
Square to = s + Direction(c == WHITE ? steps[pt][i] : -steps[pt][i]);
// Helper returning the target bitboard of a step from a square
auto landing_square_bb = [&](Square s, int step)
{
Square to = Square(s + step);
return is_ok(to) && distance(s, to) <= 2 ? square_bb(to) : Bitboard(0);
};
if (is_ok(to) && distance(s, to) < 3)
{
if (pt == PAWN)
PawnAttacks[c][s] |= to;
else
PseudoAttacks[pt][s] |= to;
}
}
for (Square s = SQ_A1; s <= SQ_H8; ++s)
{
for (int step : {-9, -8, -7, -1, 1, 7, 8, 9} )
PseudoAttacks[KING][s] |= landing_square_bb(s, step);
for (int step : {-17, -15, -10, -6, 6, 10, 15, 17} )
PseudoAttacks[KNIGHT][s] |= landing_square_bb(s, step);
}
Direction RookDirections[] = { NORTH, EAST, SOUTH, WEST };
Direction BishopDirections[] = { NORTH_EAST, SOUTH_EAST, SOUTH_WEST, NORTH_WEST };
@@ -150,13 +113,8 @@ void Bitboards::init() {
for (PieceType pt : { BISHOP, ROOK })
for (Square s2 = SQ_A1; s2 <= SQ_H8; ++s2)
{
if (!(PseudoAttacks[pt][s1] & s2))
continue;
LineBB[s1][s2] = (attacks_bb(pt, s1, 0) & attacks_bb(pt, s2, 0)) | s1 | s2;
BetweenBB[s1][s2] = attacks_bb(pt, s1, SquareBB[s2]) & attacks_bb(pt, s2, SquareBB[s1]);
}
if (PseudoAttacks[pt][s1] & s2)
LineBB[s1][s2] = (attacks_bb(pt, s1, 0) & attacks_bb(pt, s2, 0)) | s1 | s2;
}
}
@@ -184,8 +142,8 @@ namespace {
// init_magics() computes all rook and bishop attacks at startup. Magic
// bitboards are used to look up attacks of sliding pieces. As a reference see
// chessprogramming.wikispaces.com/Magic+Bitboards. In particular, here we
// use the so called "fancy" approach.
// www.chessprogramming.org/Magic_Bitboards. In particular, here we use the so
// called "fancy" approach.
void init_magics(Bitboard table[], Magic magics[], Direction directions[]) {

156
DroidFishApp/src/main/cpp/stockfish/bitboard.h
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@@ -2,7 +2,7 @@
Stockfish, a UCI chess playing engine derived from Glaurung 2.1
Copyright (C) 2004-2008 Tord Romstad (Glaurung author)
Copyright (C) 2008-2015 Marco Costalba, Joona Kiiski, Tord Romstad
Copyright (C) 2015-2019 Marco Costalba, Joona Kiiski, Gary Linscott, Tord Romstad
Copyright (C) 2015-2020 Marco Costalba, Joona Kiiski, Gary Linscott, Tord Romstad
Stockfish is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
@@ -60,19 +60,22 @@ constexpr Bitboard Rank6BB = Rank1BB << (8 * 5);
constexpr Bitboard Rank7BB = Rank1BB << (8 * 6);
constexpr Bitboard Rank8BB = Rank1BB << (8 * 7);
extern int SquareDistance[SQUARE_NB][SQUARE_NB];
constexpr Bitboard QueenSide = FileABB | FileBBB | FileCBB | FileDBB;
constexpr Bitboard CenterFiles = FileCBB | FileDBB | FileEBB | FileFBB;
constexpr Bitboard KingSide = FileEBB | FileFBB | FileGBB | FileHBB;
constexpr Bitboard Center = (FileDBB | FileEBB) & (Rank4BB | Rank5BB);
constexpr Bitboard KingFlank[FILE_NB] = {
QueenSide ^ FileDBB, QueenSide, QueenSide,
CenterFiles, CenterFiles,
KingSide, KingSide, KingSide ^ FileEBB
};
extern uint8_t PopCnt16[1 << 16];
extern uint8_t SquareDistance[SQUARE_NB][SQUARE_NB];
extern Bitboard SquareBB[SQUARE_NB];
extern Bitboard FileBB[FILE_NB];
extern Bitboard RankBB[RANK_NB];
extern Bitboard AdjacentFilesBB[FILE_NB];
extern Bitboard ForwardRanksBB[COLOR_NB][RANK_NB];
extern Bitboard BetweenBB[SQUARE_NB][SQUARE_NB];
extern Bitboard LineBB[SQUARE_NB][SQUARE_NB];
extern Bitboard DistanceRingBB[SQUARE_NB][8];
extern Bitboard ForwardFileBB[COLOR_NB][SQUARE_NB];
extern Bitboard PassedPawnMask[COLOR_NB][SQUARE_NB];
extern Bitboard PawnAttackSpan[COLOR_NB][SQUARE_NB];
extern Bitboard PseudoAttacks[PIECE_TYPE_NB][SQUARE_NB];
extern Bitboard PawnAttacks[COLOR_NB][SQUARE_NB];
@@ -102,64 +105,61 @@ struct Magic {
extern Magic RookMagics[SQUARE_NB];
extern Magic BishopMagics[SQUARE_NB];
inline Bitboard square_bb(Square s) {
assert(s >= SQ_A1 && s <= SQ_H8);
return SquareBB[s];
}
/// Overloads of bitwise operators between a Bitboard and a Square for testing
/// whether a given bit is set in a bitboard, and for setting and clearing bits.
inline Bitboard operator&(Bitboard b, Square s) {
assert(s >= SQ_A1 && s <= SQ_H8);
return b & SquareBB[s];
}
inline Bitboard operator&( Bitboard b, Square s) { return b & square_bb(s); }
inline Bitboard operator|( Bitboard b, Square s) { return b | square_bb(s); }
inline Bitboard operator^( Bitboard b, Square s) { return b ^ square_bb(s); }
inline Bitboard& operator|=(Bitboard& b, Square s) { return b |= square_bb(s); }
inline Bitboard& operator^=(Bitboard& b, Square s) { return b ^= square_bb(s); }
inline Bitboard operator|(Bitboard b, Square s) {
assert(s >= SQ_A1 && s <= SQ_H8);
return b | SquareBB[s];
}
inline Bitboard operator&(Square s, Bitboard b) { return b & s; }
inline Bitboard operator|(Square s, Bitboard b) { return b | s; }
inline Bitboard operator^(Square s, Bitboard b) { return b ^ s; }
inline Bitboard operator^(Bitboard b, Square s) {
assert(s >= SQ_A1 && s <= SQ_H8);
return b ^ SquareBB[s];
}
inline Bitboard& operator|=(Bitboard& b, Square s) {
assert(s >= SQ_A1 && s <= SQ_H8);
return b |= SquareBB[s];
}
inline Bitboard& operator^=(Bitboard& b, Square s) {
assert(s >= SQ_A1 && s <= SQ_H8);
return b ^= SquareBB[s];
}
inline Bitboard operator|(Square s, Square s2) { return square_bb(s) | square_bb(s2); }
constexpr bool more_than_one(Bitboard b) {
return b & (b - 1);
}
inline bool opposite_colors(Square s1, Square s2) {
return bool(DarkSquares & s1) != bool(DarkSquares & s2);
}
/// rank_bb() and file_bb() return a bitboard representing all the squares on
/// the given file or rank.
inline Bitboard rank_bb(Rank r) {
return RankBB[r];
return Rank1BB << (8 * r);
}
inline Bitboard rank_bb(Square s) {
return RankBB[rank_of(s)];
return rank_bb(rank_of(s));
}
inline Bitboard file_bb(File f) {
return FileBB[f];
return FileABB << f;
}
inline Bitboard file_bb(Square s) {
return FileBB[file_of(s)];
return file_bb(file_of(s));
}
/// shift() moves a bitboard one step along direction D (mainly for pawns)
/// shift() moves a bitboard one step along direction D
template<Direction D>
constexpr Bitboard shift(Bitboard b) {
return D == NORTH ? b << 8 : D == SOUTH ? b >> 8
: D == NORTH+NORTH? b <<16 : D == SOUTH+SOUTH? b >>16
: D == EAST ? (b & ~FileHBB) << 1 : D == WEST ? (b & ~FileABB) >> 1
: D == NORTH_EAST ? (b & ~FileHBB) << 9 : D == NORTH_WEST ? (b & ~FileABB) << 7
: D == SOUTH_EAST ? (b & ~FileHBB) >> 7 : D == SOUTH_WEST ? (b & ~FileABB) >> 9
@@ -167,8 +167,8 @@ constexpr Bitboard shift(Bitboard b) {
}
/// pawn_attacks_bb() returns the pawn attacks for the given color from the
/// squares in the given bitboard.
/// pawn_attacks_bb() returns the squares attacked by pawns of the given color
/// from the squares in the given bitboard.
template<Color C>
constexpr Bitboard pawn_attacks_bb(Bitboard b) {
@@ -177,58 +177,65 @@ constexpr Bitboard pawn_attacks_bb(Bitboard b) {
}
/// pawn_double_attacks_bb() returns the squares doubly attacked by pawns of the
/// given color from the squares in the given bitboard.
template<Color C>
constexpr Bitboard pawn_double_attacks_bb(Bitboard b) {
return C == WHITE ? shift<NORTH_WEST>(b) & shift<NORTH_EAST>(b)
: shift<SOUTH_WEST>(b) & shift<SOUTH_EAST>(b);
}
/// adjacent_files_bb() returns a bitboard representing all the squares on the
/// adjacent files of the given one.
inline Bitboard adjacent_files_bb(File f) {
return AdjacentFilesBB[f];
inline Bitboard adjacent_files_bb(Square s) {
return shift<EAST>(file_bb(s)) | shift<WEST>(file_bb(s));
}
/// between_bb() returns a bitboard representing all the squares between the two
/// given ones. For instance, between_bb(SQ_C4, SQ_F7) returns a bitboard with
/// the bits for square d5 and e6 set. If s1 and s2 are not on the same rank, file
/// or diagonal, 0 is returned.
/// between_bb() returns squares that are linearly between the given squares
/// If the given squares are not on a same file/rank/diagonal, return 0.
inline Bitboard between_bb(Square s1, Square s2) {
return BetweenBB[s1][s2];
return LineBB[s1][s2] & ( (AllSquares << (s1 + (s1 < s2)))
^(AllSquares << (s2 + !(s1 < s2))));
}
/// forward_ranks_bb() returns a bitboard representing the squares on all the ranks
/// forward_ranks_bb() returns a bitboard representing the squares on the ranks
/// in front of the given one, from the point of view of the given color. For instance,
/// forward_ranks_bb(BLACK, SQ_D3) will return the 16 squares on ranks 1 and 2.
inline Bitboard forward_ranks_bb(Color c, Square s) {
return ForwardRanksBB[c][rank_of(s)];
return c == WHITE ? ~Rank1BB << 8 * (rank_of(s) - RANK_1)
: ~Rank8BB >> 8 * (RANK_8 - rank_of(s));
}
/// forward_file_bb() returns a bitboard representing all the squares along the line
/// in front of the given one, from the point of view of the given color:
/// ForwardFileBB[c][s] = forward_ranks_bb(c, s) & file_bb(s)
/// forward_file_bb() returns a bitboard representing all the squares along the
/// line in front of the given one, from the point of view of the given color.
inline Bitboard forward_file_bb(Color c, Square s) {
return ForwardFileBB[c][s];
return forward_ranks_bb(c, s) & file_bb(s);
}
/// pawn_attack_span() returns a bitboard representing all the squares that can be
/// attacked by a pawn of the given color when it moves along its file, starting
/// from the given square:
/// PawnAttackSpan[c][s] = forward_ranks_bb(c, s) & adjacent_files_bb(file_of(s));
/// pawn_attack_span() returns a bitboard representing all the squares that can
/// be attacked by a pawn of the given color when it moves along its file,
/// starting from the given square.
inline Bitboard pawn_attack_span(Color c, Square s) {
return PawnAttackSpan[c][s];
return forward_ranks_bb(c, s) & adjacent_files_bb(s);
}
/// passed_pawn_mask() returns a bitboard mask which can be used to test if a
/// pawn of the given color and on the given square is a passed pawn:
/// PassedPawnMask[c][s] = pawn_attack_span(c, s) | forward_file_bb(c, s)
/// passed_pawn_span() returns a bitboard which can be used to test if a pawn of
/// the given color and on the given square is a passed pawn.
inline Bitboard passed_pawn_mask(Color c, Square s) {
return PassedPawnMask[c][s];
inline Bitboard passed_pawn_span(Color c, Square s) {
return forward_ranks_bb(c, s) & (adjacent_files_bb(s) | file_bb(s));
}
@@ -241,15 +248,16 @@ inline bool aligned(Square s1, Square s2, Square s3) {
/// distance() functions return the distance between x and y, defined as the
/// number of steps for a king in x to reach y. Works with squares, ranks, files.
/// number of steps for a king in x to reach y.
template<typename T> inline int distance(T x, T y) { return x < y ? y - x : x - y; }
template<typename T1 = Square> inline int distance(Square x, Square y);
template<> inline int distance<File>(Square x, Square y) { return std::abs(file_of(x) - file_of(y)); }
template<> inline int distance<Rank>(Square x, Square y) { return std::abs(rank_of(x) - rank_of(y)); }
template<> inline int distance<Square>(Square x, Square y) { return SquareDistance[x][y]; }
template<typename T1, typename T2> inline int distance(T2 x, T2 y);
template<> inline int distance<File>(Square x, Square y) { return distance(file_of(x), file_of(y)); }
template<> inline int distance<Rank>(Square x, Square y) { return distance(rank_of(x), rank_of(y)); }
template<class T> constexpr const T& clamp(const T& v, const T& lo, const T& hi) {
return v < lo ? lo : v > hi ? hi : v;
}
/// attacks_bb() returns a bitboard representing all the squares attacked by a
/// piece of type Pt (bishop or rook) placed on 's'.
@@ -281,7 +289,6 @@ inline int popcount(Bitboard b) {
#ifndef USE_POPCNT
extern uint8_t PopCnt16[1 << 16];
union { Bitboard bb; uint16_t u[4]; } v = { b };
return PopCnt16[v.u[0]] + PopCnt16[v.u[1]] + PopCnt16[v.u[2]] + PopCnt16[v.u[3]];
@@ -375,10 +382,9 @@ inline Square pop_lsb(Bitboard* b) {
}
/// frontmost_sq() and backmost_sq() return the square corresponding to the
/// most/least advanced bit relative to the given color.
inline Square frontmost_sq(Color c, Bitboard b) { return c == WHITE ? msb(b) : lsb(b); }
inline Square backmost_sq(Color c, Bitboard b) { return c == WHITE ? lsb(b) : msb(b); }
/// frontmost_sq() returns the most advanced square for the given color
inline Square frontmost_sq(Color c, Bitboard b) {
return c == WHITE ? msb(b) : lsb(b);
}
#endif // #ifndef BITBOARD_H_INCLUDED

95
DroidFishApp/src/main/cpp/stockfish/endgame.cpp
View File

@@ -2,7 +2,7 @@
Stockfish, a UCI chess playing engine derived from Glaurung 2.1
Copyright (C) 2004-2008 Tord Romstad (Glaurung author)
Copyright (C) 2008-2015 Marco Costalba, Joona Kiiski, Tord Romstad
Copyright (C) 2015-2019 Marco Costalba, Joona Kiiski, Gary Linscott, Tord Romstad
Copyright (C) 2015-2020 Marco Costalba, Joona Kiiski, Gary Linscott, Tord Romstad
Stockfish is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
@@ -18,7 +18,6 @@
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <algorithm>
#include <cassert>
#include "bitboard.h"
@@ -45,14 +44,14 @@ namespace {
// Table used to drive the king towards a corner square of the
// right color in KBN vs K endgames.
constexpr int PushToCorners[SQUARE_NB] = {
200, 190, 180, 170, 160, 150, 140, 130,
190, 180, 170, 160, 150, 140, 130, 140,
180, 170, 155, 140, 140, 125, 140, 150,
170, 160, 140, 120, 110, 140, 150, 160,
160, 150, 140, 110, 120, 140, 160, 170,
150, 140, 125, 140, 140, 155, 170, 180,
140, 130, 140, 150, 160, 170, 180, 190,
130, 140, 150, 160, 170, 180, 190, 200
6400, 6080, 5760, 5440, 5120, 4800, 4480, 4160,
6080, 5760, 5440, 5120, 4800, 4480, 4160, 4480,
5760, 5440, 4960, 4480, 4480, 4000, 4480, 4800,
5440, 5120, 4480, 3840, 3520, 4480, 4800, 5120,
5120, 4800, 4480, 3520, 3840, 4480, 5120, 5440,
4800, 4480, 4000, 4480, 4480, 4960, 5440, 5760,
4480, 4160, 4480, 4800, 5120, 5440, 5760, 6080,
4160, 4480, 4800, 5120, 5440, 5760, 6080, 6400
};
// Tables used to drive a piece towards or away from another piece
@@ -75,17 +74,42 @@ namespace {
assert(pos.count<PAWN>(strongSide) == 1);
if (file_of(pos.square<PAWN>(strongSide)) >= FILE_E)
sq = Square(sq ^ 7); // Mirror SQ_H1 -> SQ_A1
sq = Square(int(sq) ^ 7); // Mirror SQ_H1 -> SQ_A1
if (strongSide == BLACK)
sq = ~sq;
return sq;
return strongSide == WHITE ? sq : ~sq;
}
} // namespace
namespace Endgames {
std::pair<Map<Value>, Map<ScaleFactor>> maps;
void init() {
add<KPK>("KPK");
add<KNNK>("KNNK");
add<KBNK>("KBNK");
add<KRKP>("KRKP");
add<KRKB>("KRKB");
add<KRKN>("KRKN");
add<KQKP>("KQKP");
add<KQKR>("KQKR");
add<KNNKP>("KNNKP");
add<KNPK>("KNPK");
add<KNPKB>("KNPKB");
add<KRPKR>("KRPKR");
add<KRPKB>("KRPKB");
add<KBPKB>("KBPKB");
add<KBPKN>("KBPKN");
add<KBPPKB>("KBPPKB");
add<KRPPKRP>("KRPPKRP");
}
}
/// Mate with KX vs K. This function is used to evaluate positions with
/// king and plenty of material vs a lone king. It simply gives the
/// attacking side a bonus for driving the defending king towards the edge
@@ -120,7 +144,7 @@ Value Endgame<KXK>::operator()(const Position& pos) const {
/// Mate with KBN vs K. This is similar to KX vs K, but we have to drive the
/// defending king towards a corner square of the right color.
/// defending king towards a corner square that our bishop attacks.
template<>
Value Endgame<KBNK>::operator()(const Position& pos) const {
@@ -131,24 +155,19 @@ Value Endgame<KBNK>::operator()(const Position& pos) const {
Square loserKSq = pos.square<KING>(weakSide);
Square bishopSq = pos.square<BISHOP>(strongSide);
// kbnk_mate_table() tries to drive toward corners A1 or H8. If we have a
// bishop that cannot reach the above squares, we flip the kings in order
// to drive the enemy toward corners A8 or H1.
if (opposite_colors(bishopSq, SQ_A1))
{
winnerKSq = ~winnerKSq;
loserKSq = ~loserKSq;
}
// If our bishop does not attack A1/H8, we flip the enemy king square
// to drive to opposite corners (A8/H1).
Value result = VALUE_KNOWN_WIN
+ PushClose[distance(winnerKSq, loserKSq)]
+ PushToCorners[loserKSq];
+ PushToCorners[opposite_colors(bishopSq, SQ_A1) ? ~loserKSq : loserKSq];
assert(abs(result) < VALUE_MATE_IN_MAX_PLY);
return strongSide == pos.side_to_move() ? result : -result;
}
/// KP vs K. This endgame is evaluated with the help of a bitbase.
/// KP vs K. This endgame is evaluated with the help of a bitbase
template<>
Value Endgame<KPK>::operator()(const Position& pos) const {
@@ -291,6 +310,21 @@ Value Endgame<KQKR>::operator()(const Position& pos) const {
}
/// KNN vs KP. Simply push the opposing king to the corner
template<>
Value Endgame<KNNKP>::operator()(const Position& pos) const {
assert(verify_material(pos, strongSide, 2 * KnightValueMg, 0));
assert(verify_material(pos, weakSide, VALUE_ZERO, 1));
Value result = 2 * KnightValueEg
- PawnValueEg
+ PushToEdges[pos.square<KING>(weakSide)];
return strongSide == pos.side_to_move() ? result : -result;
}
/// Some cases of trivial draws
template<> Value Endgame<KNNK>::operator()(const Position&) const { return VALUE_DRAW; }
@@ -331,7 +365,7 @@ ScaleFactor Endgame<KBPsK>::operator()(const Position& pos) const {
&& pos.count<PAWN>(weakSide) >= 1)
{
// Get weakSide pawn that is closest to the home rank
Square weakPawnSq = backmost_sq(weakSide, pos.pieces(weakSide, PAWN));
Square weakPawnSq = frontmost_sq(strongSide, pos.pieces(weakSide, PAWN));
Square strongKingSq = pos.square<KING>(strongSide);
Square weakKingSq = pos.square<KING>(weakSide);
@@ -629,8 +663,6 @@ ScaleFactor Endgame<KBPPKB>::operator()(const Position& pos) const {
Square ksq = pos.square<KING>(weakSide);
Square psq1 = pos.squares<PAWN>(strongSide)[0];
Square psq2 = pos.squares<PAWN>(strongSide)[1];
Rank r1 = rank_of(psq1);
Rank r2 = rank_of(psq2);
Square blockSq1, blockSq2;
if (relative_rank(strongSide, psq1) > relative_rank(strongSide, psq2))
@@ -664,7 +696,7 @@ ScaleFactor Endgame<KBPPKB>::operator()(const Position& pos) const {
&& opposite_colors(ksq, wbsq)
&& ( bbsq == blockSq2
|| (pos.attacks_from<BISHOP>(blockSq2) & pos.pieces(weakSide, BISHOP))
|| distance(r1, r2) >= 2))
|| distance<Rank>(psq1, psq2) >= 2))
return SCALE_FACTOR_DRAW;
else if ( ksq == blockSq2
@@ -729,6 +761,9 @@ ScaleFactor Endgame<KNPK>::operator()(const Position& pos) const {
template<>
ScaleFactor Endgame<KNPKB>::operator()(const Position& pos) const {
assert(verify_material(pos, strongSide, KnightValueMg, 1));
assert(verify_material(pos, weakSide, BishopValueMg, 0));
Square pawnSq = pos.square<PAWN>(strongSide);
Square bishopSq = pos.square<BISHOP>(weakSide);
Square weakKingSq = pos.square<KING>(weakSide);

44
DroidFishApp/src/main/cpp/stockfish/endgame.h
View File

@@ -2,7 +2,7 @@
Stockfish, a UCI chess playing engine derived from Glaurung 2.1
Copyright (C) 2004-2008 Tord Romstad (Glaurung author)
Copyright (C) 2008-2015 Marco Costalba, Joona Kiiski, Tord Romstad
Copyright (C) 2015-2019 Marco Costalba, Joona Kiiski, Gary Linscott, Tord Romstad
Copyright (C) 2015-2020 Marco Costalba, Joona Kiiski, Gary Linscott, Tord Romstad
Stockfish is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
@@ -21,7 +21,7 @@
#ifndef ENDGAME_H_INCLUDED
#define ENDGAME_H_INCLUDED
#include <map>
#include <unordered_map>
#include <memory>
#include <string>
#include <type_traits>
@@ -37,6 +37,7 @@ enum EndgameCode {
EVALUATION_FUNCTIONS,
KNNK, // KNN vs K
KNNKP, // KNN vs KP
KXK, // Generic "mate lone king" eval
KBNK, // KBN vs K
KPK, // KP vs K
@@ -90,14 +91,18 @@ struct Endgame : public EndgameBase<T> {
};
/// The Endgames class stores the pointers to endgame evaluation and scaling
/// The Endgames namespace handles the pointers to endgame evaluation and scaling
/// base objects in two std::map. We use polymorphism to invoke the actual
/// endgame function by calling its virtual operator().
class Endgames {
namespace Endgames {
template<typename T> using Ptr = std::unique_ptr<EndgameBase<T>>;
template<typename T> using Map = std::map<Key, Ptr<T>>;
template<typename T> using Map = std::unordered_map<Key, Ptr<T>>;
extern std::pair<Map<Value>, Map<ScaleFactor>> maps;
void init();
template<typename T>
Map<T>& map() {
@@ -112,34 +117,11 @@ class Endgames {
map<T>()[Position().set(code, BLACK, &st).material_key()] = Ptr<T>(new Endgame<E>(BLACK));
}
std::pair<Map<Value>, Map<ScaleFactor>> maps;
public:
Endgames() {
add<KPK>("KPK");
add<KNNK>("KNNK");
add<KBNK>("KBNK");
add<KRKP>("KRKP");
add<KRKB>("KRKB");
add<KRKN>("KRKN");
add<KQKP>("KQKP");
add<KQKR>("KQKR");
add<KNPK>("KNPK");
add<KNPKB>("KNPKB");
add<KRPKR>("KRPKR");
add<KRPKB>("KRPKB");
add<KBPKB>("KBPKB");
add<KBPKN>("KBPKN");
add<KBPPKB>("KBPPKB");
add<KRPPKRP>("KRPPKRP");
}
template<typename T>
const EndgameBase<T>* probe(Key key) {
return map<T>().count(key) ? map<T>()[key].get() : nullptr;
auto it = map<T>().find(key);
return it != map<T>().end() ? it->second.get() : nullptr;
}
};
}
#endif // #ifndef ENDGAME_H_INCLUDED

519
DroidFishApp/src/main/cpp/stockfish/evaluate.cpp
View File

@@ -2,7 +2,7 @@
Stockfish, a UCI chess playing engine derived from Glaurung 2.1
Copyright (C) 2004-2008 Tord Romstad (Glaurung author)
Copyright (C) 2008-2015 Marco Costalba, Joona Kiiski, Tord Romstad
Copyright (C) 2015-2019 Marco Costalba, Joona Kiiski, Gary Linscott, Tord Romstad
Copyright (C) 2015-2020 Marco Costalba, Joona Kiiski, Gary Linscott, Tord Romstad
Stockfish is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
@@ -73,28 +73,17 @@ using namespace Trace;
namespace {
constexpr Bitboard QueenSide = FileABB | FileBBB | FileCBB | FileDBB;
constexpr Bitboard CenterFiles = FileCBB | FileDBB | FileEBB | FileFBB;
constexpr Bitboard KingSide = FileEBB | FileFBB | FileGBB | FileHBB;
constexpr Bitboard Center = (FileDBB | FileEBB) & (Rank4BB | Rank5BB);
constexpr Bitboard KingFlank[FILE_NB] = {
QueenSide ^ FileDBB, QueenSide, QueenSide,
CenterFiles, CenterFiles,
KingSide, KingSide, KingSide ^ FileEBB
};
// Threshold for lazy and space evaluation
constexpr Value LazyThreshold = Value(1500);
constexpr Value LazyThreshold = Value(1400);
constexpr Value SpaceThreshold = Value(12222);
// KingAttackWeights[PieceType] contains king attack weights by piece type
constexpr int KingAttackWeights[PIECE_TYPE_NB] = { 0, 0, 77, 55, 44, 10 };
constexpr int KingAttackWeights[PIECE_TYPE_NB] = { 0, 0, 81, 52, 44, 10 };
// Penalties for enemy's safe checks
constexpr int QueenSafeCheck = 780;
constexpr int RookSafeCheck = 880;
constexpr int BishopSafeCheck = 435;
constexpr int RookSafeCheck = 1080;
constexpr int BishopSafeCheck = 635;
constexpr int KnightSafeCheck = 790;
#define S(mg, eg) make_score(mg, eg)
@@ -117,61 +106,47 @@ namespace {
S(106,184), S(109,191), S(113,206), S(116,212) }
};
// Outpost[knight/bishop][supported by pawn] contains bonuses for minor
// pieces if they occupy or can reach an outpost square, bigger if that
// square is supported by a pawn.
constexpr Score Outpost[][2] = {
{ S(22, 6), S(36,12) }, // Knight
{ S( 9, 2), S(15, 5) } // Bishop
};
// RookOnFile[semiopen/open] contains bonuses for each rook when there is
// no (friendly) pawn on the rook file.
constexpr Score RookOnFile[] = { S(18, 7), S(44, 20) };
constexpr Score RookOnFile[] = { S(21, 4), S(47, 25) };
// ThreatByMinor/ByRook[attacked PieceType] contains bonuses according to
// which piece type attacks which one. Attacks on lesser pieces which are
// pawn-defended are not considered.
constexpr Score ThreatByMinor[PIECE_TYPE_NB] = {
S(0, 0), S(0, 31), S(39, 42), S(57, 44), S(68, 112), S(62, 120)
S(0, 0), S(6, 32), S(59, 41), S(79, 56), S(90, 119), S(79, 161)
};
constexpr Score ThreatByRook[PIECE_TYPE_NB] = {
S(0, 0), S(0, 24), S(38, 71), S(38, 61), S(0, 38), S(51, 38)
S(0, 0), S(3, 44), S(38, 71), S(38, 61), S(0, 38), S(51, 38)
};
// PassedRank[Rank] contains a bonus according to the rank of a passed pawn
constexpr Score PassedRank[RANK_NB] = {
S(0, 0), S(5, 18), S(12, 23), S(10, 31), S(57, 62), S(163, 167), S(271, 250)
};
// PassedFile[File] contains a bonus according to the file of a passed pawn
constexpr Score PassedFile[FILE_NB] = {
S( -1, 7), S( 0, 9), S(-9, -8), S(-30,-14),
S(-30,-14), S(-9, -8), S( 0, 9), S( -1, 7)
S(0, 0), S(10, 28), S(17, 33), S(15, 41), S(62, 72), S(168, 177), S(276, 260)
};
// Assorted bonuses and penalties
constexpr Score BishopPawns = S( 3, 8);
constexpr Score CloseEnemies = S( 7, 0);
constexpr Score BishopPawns = S( 3, 7);
constexpr Score CorneredBishop = S( 50, 50);
constexpr Score Hanging = S( 62, 34);
constexpr Score KingProtector = S( 6, 7);
constexpr Score KnightOnQueen = S( 20, 12);
constexpr Score LongDiagonalBishop = S( 44, 0);
constexpr Score MinorBehindPawn = S( 16, 0);
constexpr Score Overload = S( 12, 6);
constexpr Score PawnlessFlank = S( 18, 94);
constexpr Score RestrictedPiece = S( 7, 6);
constexpr Score RookOnPawn = S( 10, 28);
constexpr Score SliderOnQueen = S( 49, 21);
constexpr Score ThreatByKing = S( 21, 84);
constexpr Score ThreatByPawnPush = S( 48, 42);
constexpr Score ThreatByRank = S( 14, 3);
constexpr Score ThreatBySafePawn = S(169, 99);
constexpr Score TrappedRook = S( 98, 5);
constexpr Score WeakQueen = S( 51, 10);
constexpr Score WeakUnopposedPawn = S( 14, 20);
constexpr Score FlankAttacks = S( 8, 0);
constexpr Score Hanging = S( 69, 36);
constexpr Score KingProtector = S( 7, 8);
constexpr Score KnightOnQueen = S( 16, 12);
constexpr Score LongDiagonalBishop = S( 45, 0);
constexpr Score MinorBehindPawn = S( 18, 3);
constexpr Score Outpost = S( 30, 21);
constexpr Score PassedFile = S( 11, 8);
constexpr Score PawnlessFlank = S( 17, 95);
constexpr Score RestrictedPiece = S( 7, 7);
constexpr Score ReachableOutpost = S( 32, 10);
constexpr Score RookOnQueenFile = S( 7, 6);
constexpr Score SliderOnQueen = S( 59, 18);
constexpr Score ThreatByKing = S( 24, 89);
constexpr Score ThreatByPawnPush = S( 48, 39);
constexpr Score ThreatBySafePawn = S(173, 94);
constexpr Score TrappedRook = S( 52, 10);
constexpr Score WeakQueen = S( 49, 15);
#undef S
@@ -193,7 +168,7 @@ namespace {
template<Color Us> Score passed() const;
template<Color Us> Score space() const;
ScaleFactor scale_factor(Value eg) const;
Score initiative(Value eg) const;
Score initiative(Score score) const;
const Position& pos;
Material::Entry* me;
@@ -206,15 +181,12 @@ namespace {
// is also calculated is ALL_PIECES.
Bitboard attackedBy[COLOR_NB][PIECE_TYPE_NB];
// attackedBy2[color] are the squares attacked by 2 pieces of a given color,
// possibly via x-ray or by one pawn and one piece. Diagonal x-ray through
// pawn or squares attacked by 2 pawns are not explicitly added.
// attackedBy2[color] are the squares attacked by at least 2 units of a given
// color, including x-rays. But diagonal x-rays through pawns are not computed.
Bitboard attackedBy2[COLOR_NB];
// kingRing[color] are the squares adjacent to the king, plus (only for a
// king on its first rank) the squares two ranks in front. For instance,
// if black's king is on g8, kingRing[BLACK] is f8, h8, f7, g7, h7, f6, g6
// and h6. It is set to 0 when king safety evaluation is skipped.
// kingRing[color] are the squares adjacent to the king plus some other
// very near squares, depending on king position.
Bitboard kingRing[COLOR_NB];
// kingAttackersCount[color] is the number of pieces of the given color
@@ -242,41 +214,37 @@ namespace {
void Evaluation<T>::initialize() {
constexpr Color Them = (Us == WHITE ? BLACK : WHITE);
constexpr Direction Up = (Us == WHITE ? NORTH : SOUTH);
constexpr Direction Down = (Us == WHITE ? SOUTH : NORTH);
constexpr Bitboard LowRanks = (Us == WHITE ? Rank2BB | Rank3BB: Rank7BB | Rank6BB);
constexpr Direction Up = pawn_push(Us);
constexpr Direction Down = -Up;
constexpr Bitboard LowRanks = (Us == WHITE ? Rank2BB | Rank3BB : Rank7BB | Rank6BB);
const Square ksq = pos.square<KING>(Us);
Bitboard dblAttackByPawn = pawn_double_attacks_bb<Us>(pos.pieces(Us, PAWN));
// Find our pawns that are blocked or on the first two ranks
Bitboard b = pos.pieces(Us, PAWN) & (shift<Down>(pos.pieces()) | LowRanks);
// Squares occupied by those pawns, by our king or queen, or controlled by enemy pawns
// are excluded from the mobility area.
mobilityArea[Us] = ~(b | pos.pieces(Us, KING, QUEEN) | pe->pawn_attacks(Them));
// Squares occupied by those pawns, by our king or queen, by blockers to attacks on our king
// or controlled by enemy pawns are excluded from the mobility area.
mobilityArea[Us] = ~(b | pos.pieces(Us, KING, QUEEN) | pos.blockers_for_king(Us) | pe->pawn_attacks(Them));
// Initialise attackedBy bitboards for kings and pawns
attackedBy[Us][KING] = pos.attacks_from<KING>(pos.square<KING>(Us));
// Initialize attackedBy[] for king and pawns
attackedBy[Us][KING] = pos.attacks_from<KING>(ksq);
attackedBy[Us][PAWN] = pe->pawn_attacks(Us);
attackedBy[Us][ALL_PIECES] = attackedBy[Us][KING] | attackedBy[Us][PAWN];
attackedBy2[Us] = attackedBy[Us][KING] & attackedBy[Us][PAWN];
attackedBy2[Us] = dblAttackByPawn | (attackedBy[Us][KING] & attackedBy[Us][PAWN]);
kingRing[Us] = kingAttackersCount[Them] = 0;
// Init our king safety tables
Square s = make_square(clamp(file_of(ksq), FILE_B, FILE_G),
clamp(rank_of(ksq), RANK_2, RANK_7));
kingRing[Us] = PseudoAttacks[KING][s] | s;
// Init our king safety tables only if we are going to use them
if (pos.non_pawn_material(Them) >= RookValueMg + KnightValueMg)
{
kingRing[Us] = attackedBy[Us][KING];
if (relative_rank(Us, pos.square<KING>(Us)) == RANK_1)
kingRing[Us] |= shift<Up>(kingRing[Us]);
kingAttackersCount[Them] = popcount(kingRing[Us] & pe->pawn_attacks(Them));
kingAttacksCount[Them] = kingAttackersWeight[Them] = 0;
if (file_of(pos.square<KING>(Us)) == FILE_H)
kingRing[Us] |= shift<WEST>(kingRing[Us]);
else if (file_of(pos.square<KING>(Us)) == FILE_A)
kingRing[Us] |= shift<EAST>(kingRing[Us]);
kingAttackersCount[Them] = popcount(kingRing[Us] & pe->pawn_attacks(Them));
kingAttacksCount[Them] = kingAttackersWeight[Them] = 0;
}
// Remove from kingRing[] the squares defended by two pawns
kingRing[Us] &= ~dblAttackByPawn;
}
@@ -285,18 +253,17 @@ namespace {
Score Evaluation<T>::pieces() {
constexpr Color Them = (Us == WHITE ? BLACK : WHITE);
constexpr Direction Down = (Us == WHITE ? SOUTH : NORTH);
constexpr Direction Down = -pawn_push(Us);
constexpr Bitboard OutpostRanks = (Us == WHITE ? Rank4BB | Rank5BB | Rank6BB
: Rank5BB | Rank4BB | Rank3BB);
const Square* pl = pos.squares<Pt>(Us);
Bitboard b, bb;
Square s;
Score score = SCORE_ZERO;
attackedBy[Us][Pt] = 0;
while ((s = *pl++) != SQ_NONE)
for (Square s = *pl; s != SQ_NONE; s = *++pl)
{
// Find attacked squares, including x-ray attacks for bishops and rooks
b = Pt == BISHOP ? attacks_bb<BISHOP>(s, pos.pieces() ^ pos.pieces(QUEEN))
@@ -324,12 +291,12 @@ namespace {
if (Pt == BISHOP || Pt == KNIGHT)
{
// Bonus if piece is on an outpost square or can reach one
bb = OutpostRanks & ~pe->pawn_attacks_span(Them);
bb = OutpostRanks & attackedBy[Us][PAWN] & ~pe->pawn_attacks_span(Them);
if (bb & s)
score += Outpost[Pt == BISHOP][bool(attackedBy[Us][PAWN] & s)] * 2;
score += Outpost * (Pt == KNIGHT ? 2 : 1);
else if (bb &= b & ~pos.pieces(Us))
score += Outpost[Pt == BISHOP][bool(attackedBy[Us][PAWN] & bb)];
else if (Pt == KNIGHT && bb & b & ~pos.pieces(Us))
score += ReachableOutpost;
// Knight and Bishop bonus for being right behind a pawn
if (shift<Down>(pos.pieces(PAWN)) & s)
@@ -344,45 +311,44 @@ namespace {
// bishop, bigger when the center files are blocked with pawns.
Bitboard blocked = pos.pieces(Us, PAWN) & shift<Down>(pos.pieces());
score -= BishopPawns * pe->pawns_on_same_color_squares(Us, s)
score -= BishopPawns * pos.pawns_on_same_color_squares(Us, s)
* (1 + popcount(blocked & CenterFiles));
// Bonus for bishop on a long diagonal which can "see" both center squares
if (more_than_one(attacks_bb<BISHOP>(s, pos.pieces(PAWN)) & Center))
score += LongDiagonalBishop;
}
// An important Chess960 pattern: A cornered bishop blocked by a friendly
// pawn diagonally in front of it is a very serious problem, especially
// when that pawn is also blocked.
if ( Pt == BISHOP
&& pos.is_chess960()
&& (s == relative_square(Us, SQ_A1) || s == relative_square(Us, SQ_H1)))
{
Direction d = pawn_push(Us) + (file_of(s) == FILE_A ? EAST : WEST);
if (pos.piece_on(s + d) == make_piece(Us, PAWN))
score -= !pos.empty(s + d + pawn_push(Us)) ? CorneredBishop * 4
: pos.piece_on(s + d + d) == make_piece(Us, PAWN) ? CorneredBishop * 2
: CorneredBishop;
// An important Chess960 pattern: a cornered bishop blocked by a friendly
// pawn diagonally in front of it is a very serious problem, especially
// when that pawn is also blocked.
if ( pos.is_chess960()
&& (s == relative_square(Us, SQ_A1) || s == relative_square(Us, SQ_H1)))
{
Direction d = pawn_push(Us) + (file_of(s) == FILE_A ? EAST : WEST);
if (pos.piece_on(s + d) == make_piece(Us, PAWN))
score -= !pos.empty(s + d + pawn_push(Us)) ? CorneredBishop * 4
: pos.piece_on(s + d + d) == make_piece(Us, PAWN) ? CorneredBishop * 2
: CorneredBishop;
}
}
}
if (Pt == ROOK)
{
// Bonus for aligning rook with enemy pawns on the same rank/file
if (relative_rank(Us, s) >= RANK_5)
score += RookOnPawn * popcount(pos.pieces(Them, PAWN) & PseudoAttacks[ROOK][s]);
// Bonus for rook on the same file as a queen
if (file_bb(s) & pos.pieces(QUEEN))
score += RookOnQueenFile;
// Bonus for rook on an open or semi-open file
if (pe->semiopen_file(Us, file_of(s)))
score += RookOnFile[bool(pe->semiopen_file(Them, file_of(s)))];
if (pos.is_on_semiopen_file(Us, s))
score += RookOnFile[pos.is_on_semiopen_file(Them, s)];
// Penalty when trapped by the king, even more if the king cannot castle
else if (mob <= 3)
{
File kf = file_of(pos.square<KING>(Us));
if ((kf < FILE_E) == (file_of(s) < kf))
score -= (TrappedRook - make_score(mob * 22, 0)) * (1 + !pos.can_castle(Us));
score -= TrappedRook * (1 + !pos.castling_rights(Us));
}
}
@@ -409,89 +375,97 @@ namespace {
constexpr Bitboard Camp = (Us == WHITE ? AllSquares ^ Rank6BB ^ Rank7BB ^ Rank8BB
: AllSquares ^ Rank1BB ^ Rank2BB ^ Rank3BB);
Bitboard weak, b1, b2, b3, safe, unsafeChecks = 0;
Bitboard rookChecks, queenChecks, bishopChecks, knightChecks;
int kingDanger = 0;
const Square ksq = pos.square<KING>(Us);
Bitboard kingFlank, weak, b, b1, b2, safe, unsafeChecks;
// King shelter and enemy pawns storm
// Init the score with king shelter and enemy pawns storm
Score score = pe->king_safety<Us>(pos);
// Find the squares that opponent attacks in our king flank, and the squares
// which are attacked twice in that flank.
kingFlank = KingFlank[file_of(ksq)];
b1 = attackedBy[Them][ALL_PIECES] & kingFlank & Camp;
// Attacked squares defended at most once by our queen or king
weak = attackedBy[Them][ALL_PIECES]
& ~attackedBy2[Us]
& (~attackedBy[Us][ALL_PIECES] | attackedBy[Us][KING] | attackedBy[Us][QUEEN]);
// Analyse the safe enemy's checks which are possible on next move
safe = ~pos.pieces(Them);
safe &= ~attackedBy[Us][ALL_PIECES] | (weak & attackedBy2[Them]);
b1 = attacks_bb<ROOK >(ksq, pos.pieces() ^ pos.pieces(Us, QUEEN));
b2 = attacks_bb<BISHOP>(ksq, pos.pieces() ^ pos.pieces(Us, QUEEN));
// Enemy rooks checks
rookChecks = b1 & safe & attackedBy[Them][ROOK];
if (rookChecks)
kingDanger += RookSafeCheck;
else
unsafeChecks |= b1 & attackedBy[Them][ROOK];
// Enemy queen safe checks: we count them only if they are from squares from
// which we can't give a rook check, because rook checks are more valuable.
queenChecks = (b1 | b2)
& attackedBy[Them][QUEEN]
& safe
& ~attackedBy[Us][QUEEN]
& ~rookChecks;
if (queenChecks)
kingDanger += QueenSafeCheck;
// Enemy bishops checks: we count them only if they are from squares from
// which we can't give a queen check, because queen checks are more valuable.
bishopChecks = b2
& attackedBy[Them][BISHOP]
& safe
& ~queenChecks;
if (bishopChecks)
kingDanger += BishopSafeCheck;
else
unsafeChecks |= b2 & attackedBy[Them][BISHOP];
// Enemy knights checks
knightChecks = pos.attacks_from<KNIGHT>(ksq) & attackedBy[Them][KNIGHT];
if (knightChecks & safe)
kingDanger += KnightSafeCheck;
else
unsafeChecks |= knightChecks;
// Find the squares that opponent attacks in our king flank, the squares
// which they attack twice in that flank, and the squares that we defend.
b1 = attackedBy[Them][ALL_PIECES] & KingFlank[file_of(ksq)] & Camp;
b2 = b1 & attackedBy2[Them];
b3 = attackedBy[Us][ALL_PIECES] & KingFlank[file_of(ksq)] & Camp;
int tropism = popcount(b1) + popcount(b2);
int kingFlankAttack = popcount(b1) + popcount(b2);
int kingFlankDefense = popcount(b3);
// Main king safety evaluation
if (kingAttackersCount[Them] > 1 - pos.count<QUEEN>(Them))
{
int kingDanger = 0;
unsafeChecks = 0;
kingDanger += kingAttackersCount[Them] * kingAttackersWeight[Them]
+ 185 * popcount(kingRing[Us] & weak)
+ 148 * popcount(unsafeChecks)
+ 98 * popcount(pos.blockers_for_king(Us))
+ 69 * kingAttacksCount[Them]
+ 3 * kingFlankAttack * kingFlankAttack / 8
+ mg_value(mobility[Them] - mobility[Us])
- 873 * !pos.count<QUEEN>(Them)
- 100 * bool(attackedBy[Us][KNIGHT] & attackedBy[Us][KING])
- 6 * mg_value(score) / 8
- 4 * kingFlankDefense
+ 37;
// Attacked squares defended at most once by our queen or king
weak = attackedBy[Them][ALL_PIECES]
& ~attackedBy2[Us]
& (~attackedBy[Us][ALL_PIECES] | attackedBy[Us][KING] | attackedBy[Us][QUEEN]);
// Analyse the safe enemy's checks which are possible on next move
safe = ~pos.pieces(Them);
safe &= ~attackedBy[Us][ALL_PIECES] | (weak & attackedBy2[Them]);
b1 = attacks_bb<ROOK >(ksq, pos.pieces() ^ pos.pieces(Us, QUEEN));
b2 = attacks_bb<BISHOP>(ksq, pos.pieces() ^ pos.pieces(Us, QUEEN));
// Enemy queen safe checks
if ((b1 | b2) & attackedBy[Them][QUEEN] & safe & ~attackedBy[Us][QUEEN])
kingDanger += QueenSafeCheck;
b1 &= attackedBy[Them][ROOK];
b2 &= attackedBy[Them][BISHOP];
// Enemy rooks checks
if (b1 & safe)
kingDanger += RookSafeCheck;
else
unsafeChecks |= b1;
// Enemy bishops checks
if (b2 & safe)
kingDanger += BishopSafeCheck;
else
unsafeChecks |= b2;
// Enemy knights checks
b = pos.attacks_from<KNIGHT>(ksq) & attackedBy[Them][KNIGHT];
if (b & safe)
kingDanger += KnightSafeCheck;
else
unsafeChecks |= b;
// Unsafe or occupied checking squares will also be considered, as long as
// the square is in the attacker's mobility area.
unsafeChecks &= mobilityArea[Them];
kingDanger += kingAttackersCount[Them] * kingAttackersWeight[Them]
+ 69 * kingAttacksCount[Them]
+ 185 * popcount(kingRing[Us] & weak)
+ 150 * popcount(pos.blockers_for_king(Us) | unsafeChecks)
+ tropism * tropism / 4
- 873 * !pos.count<QUEEN>(Them)
- 6 * mg_value(score) / 8
+ mg_value(mobility[Them] - mobility[Us])
- 30;
// Transform the kingDanger units into a Score, and subtract it from the evaluation
if (kingDanger > 0)
score -= make_score(kingDanger * kingDanger / 4096, kingDanger / 16);
}
// Transform the kingDanger units into a Score, and subtract it from the evaluation
if (kingDanger > 100)
score -= make_score(kingDanger * kingDanger / 4096, kingDanger / 16);
// Penalty when our king is on a pawnless flank
if (!(pos.pieces(PAWN) & kingFlank))
if (!(pos.pieces(PAWN) & KingFlank[file_of(ksq)]))
score -= PawnlessFlank;
// King tropism bonus, to anticipate slow motion attacks on our king
score -= CloseEnemies * tropism;
// Penalty if king flank is under attack, potentially moving toward the king
score -= FlankAttacks * kingFlankAttack;
if (T)
Trace::add(KING, Us, score);
@@ -506,14 +480,14 @@ namespace {
Score Evaluation<T>::threats() const {
constexpr Color Them = (Us == WHITE ? BLACK : WHITE);
constexpr Direction Up = (Us == WHITE ? NORTH : SOUTH);
constexpr Direction Up = pawn_push(Us);
constexpr Bitboard TRank3BB = (Us == WHITE ? Rank3BB : Rank6BB);
Bitboard b, weak, defended, nonPawnEnemies, stronglyProtected, safe, restricted;
Bitboard b, weak, defended, nonPawnEnemies, stronglyProtected, safe;
Score score = SCORE_ZERO;
// Non-pawn enemies
nonPawnEnemies = pos.pieces(Them) ^ pos.pieces(Them, PAWN);
nonPawnEnemies = pos.pieces(Them) & ~pos.pieces(PAWN);
// Squares strongly protected by the enemy, either because they defend the
// square with a pawn, or because they defend the square twice and we don't.
@@ -526,49 +500,39 @@ namespace {
// Enemies not strongly protected and under our attack
weak = pos.pieces(Them) & ~stronglyProtected & attackedBy[Us][ALL_PIECES];
// Safe or protected squares
safe = ~attackedBy[Them][ALL_PIECES] | attackedBy[Us][ALL_PIECES];
// Bonus according to the kind of attacking pieces
if (defended | weak)
{
b = (defended | weak) & (attackedBy[Us][KNIGHT] | attackedBy[Us][BISHOP]);
while (b)
{
Square s = pop_lsb(&b);
score += ThreatByMinor[type_of(pos.piece_on(s))];
if (type_of(pos.piece_on(s)) != PAWN)
score += ThreatByRank * (int)relative_rank(Them, s);
}
score += ThreatByMinor[type_of(pos.piece_on(pop_lsb(&b)))];
b = weak & attackedBy[Us][ROOK];
while (b)
{
Square s = pop_lsb(&b);
score += ThreatByRook[type_of(pos.piece_on(s))];
if (type_of(pos.piece_on(s)) != PAWN)
score += ThreatByRank * (int)relative_rank(Them, s);
}
score += ThreatByRook[type_of(pos.piece_on(pop_lsb(&b)))];
if (weak & attackedBy[Us][KING])
score += ThreatByKing;
score += Hanging * popcount(weak & ~attackedBy[Them][ALL_PIECES]);
b = weak & nonPawnEnemies & attackedBy[Them][ALL_PIECES];
score += Overload * popcount(b);
b = ~attackedBy[Them][ALL_PIECES]
| (nonPawnEnemies & attackedBy2[Us]);
score += Hanging * popcount(weak & b);
}
// Bonus for restricting their piece moves
restricted = attackedBy[Them][ALL_PIECES]
& ~attackedBy[Them][PAWN]
& ~attackedBy2[Them]
& attackedBy[Us][ALL_PIECES];
score += RestrictedPiece * popcount(restricted);
b = attackedBy[Them][ALL_PIECES]
& ~stronglyProtected
& attackedBy[Us][ALL_PIECES];
// Bonus for enemy unopposed weak pawns
if (pos.pieces(Us, ROOK, QUEEN))
score += WeakUnopposedPawn * pe->weak_unopposed(Them);
score += RestrictedPiece * popcount(b);
// Protected or unattacked squares
safe = ~attackedBy[Them][ALL_PIECES] | attackedBy[Us][ALL_PIECES];
// Bonus for attacking enemy pieces with our relatively safe pawns
b = pos.pieces(Us, PAWN) & safe;
b = pawn_attacks_bb<Us>(b) & nonPawnEnemies;
score += ThreatBySafePawn * popcount(b);
// Find squares where our pawns can push on the next move
b = shift<Up>(pos.pieces(Us, PAWN)) & ~pos.pieces();
@@ -578,14 +542,8 @@ namespace {
b &= ~attackedBy[Them][PAWN] & safe;
// Bonus for safe pawn threats on the next move
b = pawn_attacks_bb<Us>(b) & pos.pieces(Them);
score += ThreatByPawnPush * popcount(b);
// Our safe or protected pawns
b = pos.pieces(Us, PAWN) & safe;
b = pawn_attacks_bb<Us>(b) & nonPawnEnemies;
score += ThreatBySafePawn * popcount(b);
score += ThreatByPawnPush * popcount(b);
// Bonus for threats on the next moves against enemy queen
if (pos.count<QUEEN>(Them) == 1)
@@ -616,13 +574,13 @@ namespace {
Score Evaluation<T>::passed() const {
constexpr Color Them = (Us == WHITE ? BLACK : WHITE);
constexpr Direction Up = (Us == WHITE ? NORTH : SOUTH);
constexpr Direction Up = pawn_push(Us);
auto king_proximity = [&](Color c, Square s) {
return std::min(distance(pos.square<KING>(c), s), 5);
};
Bitboard b, bb, squaresToQueen, defendedSquares, unsafeSquares;
Bitboard b, bb, squaresToQueen, unsafeSquares;
Score score = SCORE_ZERO;
b = pe->passed_pawns(Us);
@@ -639,12 +597,12 @@ namespace {
if (r > RANK_3)
{
int w = (r-2) * (r-2) + 2;
int w = 5 * r - 13;
Square blockSq = s + Up;
// Adjust bonus based on the king's proximity
bonus += make_score(0, ( king_proximity(Them, blockSq) * 5
- king_proximity(Us, blockSq) * 2) * w);
bonus += make_score(0, ( (king_proximity(Them, blockSq) * 19) / 4
- king_proximity(Us, blockSq) * 2) * w);
// If blockSq is not the queening square then consider also a second push
if (r != RANK_7)
@@ -653,42 +611,37 @@ namespace {
// If the pawn is free to advance, then increase the bonus
if (pos.empty(blockSq))
{
// If there is a rook or queen attacking/defending the pawn from behind,
// consider all the squaresToQueen. Otherwise consider only the squares
// in the pawn's path attacked or occupied by the enemy.
defendedSquares = unsafeSquares = squaresToQueen = forward_file_bb(Us, s);
squaresToQueen = forward_file_bb(Us, s);
unsafeSquares = passed_pawn_span(Us, s);
bb = forward_file_bb(Them, s) & pos.pieces(ROOK, QUEEN) & pos.attacks_from<ROOK>(s);
if (!(pos.pieces(Us) & bb))
defendedSquares &= attackedBy[Us][ALL_PIECES];
bb = forward_file_bb(Them, s) & pos.pieces(ROOK, QUEEN);
if (!(pos.pieces(Them) & bb))
unsafeSquares &= attackedBy[Them][ALL_PIECES] | pos.pieces(Them);
unsafeSquares &= attackedBy[Them][ALL_PIECES];
// If there aren't any enemy attacks, assign a big bonus. Otherwise
// assign a smaller bonus if the block square isn't attacked.
int k = !unsafeSquares ? 20 : !(unsafeSquares & blockSq) ? 9 : 0;
// If there are no enemy attacks on passed pawn span, assign a big bonus.
// Otherwise assign a smaller bonus if the path to queen is not attacked
// and even smaller bonus if it is attacked but block square is not.
int k = !unsafeSquares ? 35 :
!(unsafeSquares & squaresToQueen) ? 20 :
!(unsafeSquares & blockSq) ? 9 :
0 ;
// If the path to the queen is fully defended, assign a big bonus.
// Otherwise assign a smaller bonus if the block square is defended.
if (defendedSquares == squaresToQueen)
k += 6;
else if (defendedSquares & blockSq)
k += 4;
// Assign a larger bonus if the block square is defended
if ((pos.pieces(Us) & bb) || (attackedBy[Us][ALL_PIECES] & blockSq))
k += 5;
bonus += make_score(k * w, k * w);
}
} // rank > RANK_3
} // r > RANK_3
// Scale down bonus for candidate passers which need more than one
// pawn push to become passed, or have a pawn in front of them.
if ( !pos.pawn_passed(Us, s + Up)
|| (pos.pieces(PAWN) & forward_file_bb(Us, s)))
|| (pos.pieces(PAWN) & (s + Up)))
bonus = bonus / 2;
score += bonus + PassedFile[file_of(s)];
score += bonus - PassedFile * map_to_queenside(file_of(s));
}
if (T)
@@ -711,7 +664,8 @@ namespace {
if (pos.non_pawn_material() < SpaceThreshold)
return SCORE_ZERO;
constexpr Color Them = (Us == WHITE ? BLACK : WHITE);
constexpr Color Them = (Us == WHITE ? BLACK : WHITE);
constexpr Direction Down = -pawn_push(Us);
constexpr Bitboard SpaceMask =
Us == WHITE ? CenterFiles & (Rank2BB | Rank3BB | Rank4BB)
: CenterFiles & (Rank7BB | Rank6BB | Rank5BB);
@@ -723,12 +677,11 @@ namespace {
// Find all squares which are at most three squares behind some friendly pawn
Bitboard behind = pos.pieces(Us, PAWN);
behind |= (Us == WHITE ? behind >> 8 : behind << 8);
behind |= (Us == WHITE ? behind >> 16 : behind << 16);
int bonus = popcount(safe) + popcount(behind & safe);
int weight = pos.count<ALL_PIECES>(Us) - 2 * pe->open_files();
behind |= shift<Down>(behind);
behind |= shift<Down+Down>(behind);
int bonus = popcount(safe) + popcount(behind & safe & ~attackedBy[Them][ALL_PIECES]);
int weight = pos.count<ALL_PIECES>(Us) - 1;
Score score = make_score(bonus * weight * weight / 16, 0);
if (T)
@@ -743,31 +696,44 @@ namespace {
// known attacking/defending status of the players.
template<Tracing T>
Score Evaluation<T>::initiative(Value eg) const {
Score Evaluation<T>::initiative(Score score) const {
Value mg = mg_value(score);
Value eg = eg_value(score);
int outflanking = distance<File>(pos.square<KING>(WHITE), pos.square<KING>(BLACK))
- distance<Rank>(pos.square<KING>(WHITE), pos.square<KING>(BLACK));
bool infiltration = rank_of(pos.square<KING>(WHITE)) > RANK_4
|| rank_of(pos.square<KING>(BLACK)) < RANK_5;
bool pawnsOnBothFlanks = (pos.pieces(PAWN) & QueenSide)
&& (pos.pieces(PAWN) & KingSide);
// Compute the initiative bonus for the attacking side
int complexity = 8 * pe->pawn_asymmetry()
+ 12 * pos.count<PAWN>()
+ 12 * outflanking
+ 16 * pawnsOnBothFlanks
+ 48 * !pos.non_pawn_material()
-118 ;
bool almostUnwinnable = !pe->passed_count()
&& outflanking < 0
&& !pawnsOnBothFlanks;
// Now apply the bonus: note that we find the attacking side by extracting
// the sign of the endgame value, and that we carefully cap the bonus so
// that the endgame score will never change sign after the bonus.
// Compute the initiative bonus for the attacking side
int complexity = 9 * pe->passed_count()
+ 11 * pos.count<PAWN>()
+ 9 * outflanking
+ 12 * infiltration
+ 21 * pawnsOnBothFlanks
+ 51 * !pos.non_pawn_material()
- 43 * almostUnwinnable
- 100 ;
// Now apply the bonus: note that we find the attacking side by extracting the
// sign of the midgame or endgame values, and that we carefully cap the bonus
// so that the midgame and endgame scores do not change sign after the bonus.
int u = ((mg > 0) - (mg < 0)) * std::max(std::min(complexity + 50, 0), -abs(mg));
int v = ((eg > 0) - (eg < 0)) * std::max(complexity, -abs(eg));
if (T)
Trace::add(INITIATIVE, make_score(0, v));
Trace::add(INITIATIVE, make_score(u, v));
return make_score(0, v);
return make_score(u, v);
}
@@ -783,12 +749,12 @@ namespace {
if (sf == SCALE_FACTOR_NORMAL)
{
if ( pos.opposite_bishops()
&& pos.non_pawn_material(WHITE) == BishopValueMg
&& pos.non_pawn_material(BLACK) == BishopValueMg)
sf = 8 + 4 * pe->pawn_asymmetry();
&& pos.non_pawn_material() == 2 * BishopValueMg)
sf = 22 ;
else
sf = std::min(40 + (pos.opposite_bishops() ? 2 : 7) * pos.count<PAWN>(strongSide), sf);
sf = std::min(sf, 36 + (pos.opposite_bishops() ? 2 : 7) * pos.count<PAWN>(strongSide));
sf = std::max(0, sf - (pos.rule50_count() - 12) / 4);
}
return ScaleFactor(sf);
@@ -823,7 +789,7 @@ namespace {
// Early exit if score is high
Value v = (mg_value(score) + eg_value(score)) / 2;
if (abs(v) > LazyThreshold)
if (abs(v) > LazyThreshold + pos.non_pawn_material() / 64)
return pos.side_to_move() == WHITE ? v : -v;
// Main evaluation begins here
@@ -844,14 +810,14 @@ namespace {
+ passed< WHITE>() - passed< BLACK>()
+ space< WHITE>() - space< BLACK>();
score += initiative(eg_value(score));
score += initiative(score);
// Interpolate between a middlegame and a (scaled by 'sf') endgame score
ScaleFactor sf = scale_factor(eg_value(score));
v = mg_value(score) * int(me->game_phase())
+ eg_value(score) * int(PHASE_MIDGAME - me->game_phase()) * sf / SCALE_FACTOR_NORMAL;
v /= int(PHASE_MIDGAME);
v /= PHASE_MIDGAME;
// In case of tracing add all remaining individual evaluation terms
if (T)
@@ -884,6 +850,9 @@ Value Eval::evaluate(const Position& pos) {
std::string Eval::trace(const Position& pos) {
if (pos.checkers())
return "Total evaluation: none (in check)";
std::memset(scores, 0, sizeof(scores));
pos.this_thread()->contempt = SCORE_ZERO; // Reset any dynamic contempt
@@ -899,7 +868,6 @@ std::string Eval::trace(const Position& pos) {
<< " ------------+-------------+-------------+------------\n"
<< " Material | " << Term(MATERIAL)
<< " Imbalance | " << Term(IMBALANCE)
<< " Initiative | " << Term(INITIATIVE)
<< " Pawns | " << Term(PAWN)
<< " Knights | " << Term(KNIGHT)
<< " Bishops | " << Term(BISHOP)
@@ -910,6 +878,7 @@ std::string Eval::trace(const Position& pos) {
<< " Threats | " << Term(THREAT)
<< " Passed | " << Term(PASSED)
<< " Space | " << Term(SPACE)
<< " Initiative | " << Term(INITIATIVE)
<< " ------------+-------------+-------------+------------\n"
<< " Total | " << Term(TOTAL);

4
DroidFishApp/src/main/cpp/stockfish/evaluate.h
View File

@@ -2,7 +2,7 @@
Stockfish, a UCI chess playing engine derived from Glaurung 2.1
Copyright (C) 2004-2008 Tord Romstad (Glaurung author)
Copyright (C) 2008-2015 Marco Costalba, Joona Kiiski, Tord Romstad
Copyright (C) 2015-2019 Marco Costalba, Joona Kiiski, Gary Linscott, Tord Romstad
Copyright (C) 2015-2020 Marco Costalba, Joona Kiiski, Gary Linscott, Tord Romstad
Stockfish is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
@@ -29,7 +29,7 @@ class Position;
namespace Eval {
constexpr Value Tempo = Value(20); // Must be visible to search
constexpr Value Tempo = Value(28); // Must be visible to search
std::string trace(const Position& pos);

6
DroidFishApp/src/main/cpp/stockfish/main.cpp
View File

@@ -2,7 +2,7 @@
Stockfish, a UCI chess playing engine derived from Glaurung 2.1
Copyright (C) 2004-2008 Tord Romstad (Glaurung author)
Copyright (C) 2008-2015 Marco Costalba, Joona Kiiski, Tord Romstad
Copyright (C) 2015-2019 Marco Costalba, Joona Kiiski, Gary Linscott, Tord Romstad
Copyright (C) 2015-2020 Marco Costalba, Joona Kiiski, Gary Linscott, Tord Romstad
Stockfish is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
@@ -26,6 +26,7 @@
#include "thread.h"
#include "tt.h"
#include "uci.h"
#include "endgame.h"
#include "syzygy/tbprobe.h"
namespace PSQT {
@@ -41,8 +42,7 @@ int main(int argc, char* argv[]) {
Bitboards::init();
Position::init();
Bitbases::init();
Search::init();
Pawns::init();
Endgames::init();
Threads.set(Options["Threads"]);
Search::clear(); // After threads are up

17
DroidFishApp/src/main/cpp/stockfish/material.cpp
View File

@@ -2,7 +2,7 @@
Stockfish, a UCI chess playing engine derived from Glaurung 2.1
Copyright (C) 2004-2008 Tord Romstad (Glaurung author)
Copyright (C) 2008-2015 Marco Costalba, Joona Kiiski, Tord Romstad
Copyright (C) 2015-2019 Marco Costalba, Joona Kiiski, Gary Linscott, Tord Romstad
Copyright (C) 2015-2020 Marco Costalba, Joona Kiiski, Gary Linscott, Tord Romstad
Stockfish is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
@@ -18,7 +18,6 @@
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <algorithm> // For std::min
#include <cassert>
#include <cstring> // For std::memset
@@ -70,14 +69,12 @@ namespace {
bool is_KBPsK(const Position& pos, Color us) {
return pos.non_pawn_material(us) == BishopValueMg
&& pos.count<BISHOP>(us) == 1
&& pos.count<PAWN >(us) >= 1;
}
bool is_KQKRPs(const Position& pos, Color us) {
return !pos.count<PAWN>(us)
&& pos.non_pawn_material(us) == QueenValueMg
&& pos.count<QUEEN>(us) == 1
&& pos.count<ROOK>(~us) == 1
&& pos.count<PAWN>(~us) >= 1;
}
@@ -132,7 +129,7 @@ Entry* probe(const Position& pos) {
Value npm_w = pos.non_pawn_material(WHITE);
Value npm_b = pos.non_pawn_material(BLACK);
Value npm = std::max(EndgameLimit, std::min(npm_w + npm_b, MidgameLimit));
Value npm = clamp(npm_w + npm_b, EndgameLimit, MidgameLimit);
// Map total non-pawn material into [PHASE_ENDGAME, PHASE_MIDGAME]
e->gamePhase = Phase(((npm - EndgameLimit) * PHASE_MIDGAME) / (MidgameLimit - EndgameLimit));
@@ -140,10 +137,10 @@ Entry* probe(const Position& pos) {
// Let's look if we have a specialized evaluation function for this particular
// material configuration. Firstly we look for a fixed configuration one, then
// for a generic one if the previous search failed.
if ((e->evaluationFunction = pos.this_thread()->endgames.probe<Value>(key)) != nullptr)
if ((e->evaluationFunction = Endgames::probe<Value>(key)) != nullptr)
return e;
for (Color c = WHITE; c <= BLACK; ++c)
for (Color c : { WHITE, BLACK })
if (is_KXK(pos, c))
{
e->evaluationFunction = &EvaluateKXK[c];
@@ -152,9 +149,9 @@ Entry* probe(const Position& pos) {
// OK, we didn't find any special evaluation function for the current material
// configuration. Is there a suitable specialized scaling function?
const EndgameBase<ScaleFactor>* sf;
const auto* sf = Endgames::probe<ScaleFactor>(key);
if ((sf = pos.this_thread()->endgames.probe<ScaleFactor>(key)) != nullptr)
if (sf)
{
e->scalingFunction[sf->strongSide] = sf; // Only strong color assigned
return e;
@@ -163,7 +160,7 @@ Entry* probe(const Position& pos) {
// We didn't find any specialized scaling function, so fall back on generic
// ones that refer to more than one material distribution. Note that in this
// case we don't return after setting the function.
for (Color c = WHITE; c <= BLACK; ++c)
for (Color c : { WHITE, BLACK })
{
if (is_KBPsK(pos, c))
e->scalingFunction[c] = &ScaleKBPsK[c];

4
DroidFishApp/src/main/cpp/stockfish/material.h
View File

@@ -2,7 +2,7 @@
Stockfish, a UCI chess playing engine derived from Glaurung 2.1
Copyright (C) 2004-2008 Tord Romstad (Glaurung author)
Copyright (C) 2008-2015 Marco Costalba, Joona Kiiski, Tord Romstad
Copyright (C) 2015-2019 Marco Costalba, Joona Kiiski, Gary Linscott, Tord Romstad
Copyright (C) 2015-2020 Marco Costalba, Joona Kiiski, Gary Linscott, Tord Romstad
Stockfish is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
@@ -58,7 +58,7 @@ struct Entry {
Key key;
const EndgameBase<Value>* evaluationFunction;
const EndgameBase<ScaleFactor>* scalingFunction[COLOR_NB]; // Could be one for each
// side (e.g. KPKP, KBPsKs)
// side (e.g. KPKP, KBPsK)
int16_t value;
uint8_t factor[COLOR_NB];
Phase gamePhase;

95
DroidFishApp/src/main/cpp/stockfish/misc.cpp
View File

@@ -2,7 +2,7 @@
Stockfish, a UCI chess playing engine derived from Glaurung 2.1
Copyright (C) 2004-2008 Tord Romstad (Glaurung author)
Copyright (C) 2008-2015 Marco Costalba, Joona Kiiski, Tord Romstad
Copyright (C) 2015-2019 Marco Costalba, Joona Kiiski, Gary Linscott, Tord Romstad
Copyright (C) 2015-2020 Marco Costalba, Joona Kiiski, Gary Linscott, Tord Romstad
Stockfish is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
@@ -56,7 +56,7 @@ namespace {
/// Version number. If Version is left empty, then compile date in the format
/// DD-MM-YY and show in engine_info.
const string Version = "10";
const string Version = "11";
/// Our fancy logging facility. The trick here is to replace cin.rdbuf() and
/// cout.rdbuf() with two Tie objects that tie cin and cout to a file stream. We
@@ -102,6 +102,13 @@ public:
if (!fname.empty() && !l.file.is_open())
{
l.file.open(fname, ifstream::out);
if (!l.file.is_open())
{
cerr << "Unable to open debug log file " << fname << endl;
exit(EXIT_FAILURE);
}
cin.rdbuf(&l.in);
cout.rdbuf(&l.out);
}
@@ -144,8 +151,79 @@ const string engine_info(bool to_uci) {
}
/// compiler_info() returns a string trying to describe the compiler we use
const std::string compiler_info() {
#define STRINGIFY2(x) #x
#define STRINGIFY(x) STRINGIFY2(x)
#define VER_STRING(major, minor, patch) STRINGIFY(major) "." STRINGIFY(minor) "." STRINGIFY(patch)
/// Predefined macros hell:
///
/// __GNUC__ Compiler is gcc, Clang or Intel on Linux
/// __INTEL_COMPILER Compiler is Intel
/// _MSC_VER Compiler is MSVC or Intel on Windows
/// _WIN32 Building on Windows (any)
/// _WIN64 Building on Windows 64 bit
std::string compiler = "\nCompiled by ";
#ifdef __clang__
compiler += "clang++ ";
compiler += VER_STRING(__clang_major__, __clang_minor__, __clang_patchlevel__);
#elif __INTEL_COMPILER
compiler += "Intel compiler ";
compiler += "(version ";
compiler += STRINGIFY(__INTEL_COMPILER) " update " STRINGIFY(__INTEL_COMPILER_UPDATE);
compiler += ")";
#elif _MSC_VER
compiler += "MSVC ";
compiler += "(version ";
compiler += STRINGIFY(_MSC_FULL_VER) "." STRINGIFY(_MSC_BUILD);
compiler += ")";
#elif __GNUC__
compiler += "g++ (GNUC) ";
compiler += VER_STRING(__GNUC__, __GNUC_MINOR__, __GNUC_PATCHLEVEL__);
#else
compiler += "Unknown compiler ";
compiler += "(unknown version)";
#endif
#if defined(__APPLE__)
compiler += " on Apple";
#elif defined(__CYGWIN__)
compiler += " on Cygwin";
#elif defined(__MINGW64__)
compiler += " on MinGW64";
#elif defined(__MINGW32__)
compiler += " on MinGW32";
#elif defined(__ANDROID__)
compiler += " on Android";
#elif defined(__linux__)
compiler += " on Linux";
#elif defined(_WIN64)
compiler += " on Microsoft Windows 64-bit";
#elif defined(_WIN32)
compiler += " on Microsoft Windows 32-bit";
#else
compiler += " on unknown system";
#endif
compiler += "\n __VERSION__ macro expands to: ";
#ifdef __VERSION__
compiler += __VERSION__;
#else
compiler += "(undefined macro)";
#endif
compiler += "\n";
return compiler;
}
/// Debug functions used mainly to collect run-time statistics
static int64_t hits[2], means[2];
static std::atomic<int64_t> hits[2], means[2];
void dbg_hit_on(bool b) { ++hits[0]; if (b) ++hits[1]; }
void dbg_hit_on(bool c, bool b) { if (c) dbg_hit_on(b); }
@@ -168,7 +246,7 @@ void dbg_print() {
std::ostream& operator<<(std::ostream& os, SyncCout sc) {
static Mutex m;
static std::mutex m;
if (sc == IO_LOCK)
m.lock();
@@ -210,12 +288,6 @@ void prefetch(void* addr) {
#endif
void prefetch2(void* addr) {
prefetch(addr);
prefetch((uint8_t*)addr + 64);
}
namespace WinProcGroup {
#ifndef _WIN32
@@ -257,7 +329,7 @@ int best_group(size_t idx) {
return -1;
}
while (ptr->Size > 0 && byteOffset + ptr->Size <= returnLength)
while (byteOffset < returnLength)
{
if (ptr->Relationship == RelationNumaNode)
nodes++;
@@ -268,6 +340,7 @@ int best_group(size_t idx) {
threads += (ptr->Processor.Flags == LTP_PC_SMT) ? 2 : 1;
}
assert(ptr->Size);
byteOffset += ptr->Size;
ptr = (SYSTEM_LOGICAL_PROCESSOR_INFORMATION_EX*)(((char*)ptr) + ptr->Size);
}

6
DroidFishApp/src/main/cpp/stockfish/misc.h
View File

@@ -2,7 +2,7 @@
Stockfish, a UCI chess playing engine derived from Glaurung 2.1
Copyright (C) 2004-2008 Tord Romstad (Glaurung author)
Copyright (C) 2008-2015 Marco Costalba, Joona Kiiski, Tord Romstad
Copyright (C) 2015-2019 Marco Costalba, Joona Kiiski, Gary Linscott, Tord Romstad
Copyright (C) 2015-2020 Marco Costalba, Joona Kiiski, Gary Linscott, Tord Romstad
Stockfish is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
@@ -30,8 +30,8 @@
#include "types.h"
const std::string engine_info(bool to_uci = false);
const std::string compiler_info();
void prefetch(void* addr);
void prefetch2(void* addr);
void start_logger(const std::string& fname);
void dbg_hit_on(bool b);
@@ -53,7 +53,7 @@ struct HashTable {
Entry* operator[](Key key) { return &table[(uint32_t)key & (Size - 1)]; }
private:
std::vector<Entry> table = std::vector<Entry>(Size);
std::vector<Entry> table = std::vector<Entry>(Size); // Allocate on the heap
};

98
DroidFishApp/src/main/cpp/stockfish/movegen.cpp
View File

@@ -2,7 +2,7 @@
Stockfish, a UCI chess playing engine derived from Glaurung 2.1
Copyright (C) 2004-2008 Tord Romstad (Glaurung author)
Copyright (C) 2008-2015 Marco Costalba, Joona Kiiski, Tord Romstad
Copyright (C) 2015-2019 Marco Costalba, Joona Kiiski, Gary Linscott, Tord Romstad
Copyright (C) 2015-2020 Marco Costalba, Joona Kiiski, Gary Linscott, Tord Romstad
Stockfish is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
@@ -25,47 +25,6 @@
namespace {
template<Color Us, CastlingSide Cs, bool Checks, bool Chess960>
ExtMove* generate_castling(const Position& pos, ExtMove* moveList) {
constexpr CastlingRight Cr = Us | Cs;
constexpr bool KingSide = (Cr == WHITE_OO || Cr == BLACK_OO);
if (pos.castling_impeded(Cr) || !pos.can_castle(Cr))
return moveList;
// After castling, the rook and king final positions are the same in Chess960
// as they would be in standard chess.
Square kfrom = pos.square<KING>(Us);
Square rfrom = pos.castling_rook_square(Cr);
Square kto = relative_square(Us, KingSide ? SQ_G1 : SQ_C1);
Bitboard enemies = pos.pieces(~Us);
assert(!pos.checkers());
const Direction step = Chess960 ? kto > kfrom ? WEST : EAST
: KingSide ? WEST : EAST;
for (Square s = kto; s != kfrom; s += step)
if (pos.attackers_to(s) & enemies)
return moveList;
// Because we generate only legal castling moves we need to verify that
// when moving the castling rook we do not discover some hidden checker.
// For instance an enemy queen in SQ_A1 when castling rook is in SQ_B1.
if (Chess960 && (attacks_bb<ROOK>(kto, pos.pieces() ^ rfrom) & pos.pieces(~Us, ROOK, QUEEN)))
return moveList;
Move m = make<CASTLING>(kfrom, rfrom);
if (Checks && !pos.gives_check(m))
return moveList;
*moveList++ = m;
return moveList;
}
template<GenType Type, Direction D>
ExtMove* make_promotions(ExtMove* moveList, Square to, Square ksq) {
@@ -93,16 +52,15 @@ namespace {
template<Color Us, GenType Type>
ExtMove* generate_pawn_moves(const Position& pos, ExtMove* moveList, Bitboard target) {
// Compute our parametrized parameters at compile time, named according to
// the point of view of white side.
// Compute some compile time parameters relative to the white side
constexpr Color Them = (Us == WHITE ? BLACK : WHITE);
constexpr Bitboard TRank8BB = (Us == WHITE ? Rank8BB : Rank1BB);
constexpr Bitboard TRank7BB = (Us == WHITE ? Rank7BB : Rank2BB);
constexpr Bitboard TRank3BB = (Us == WHITE ? Rank3BB : Rank6BB);
constexpr Direction Up = (Us == WHITE ? NORTH : SOUTH);
constexpr Direction Up = pawn_push(Us);
constexpr Direction UpRight = (Us == WHITE ? NORTH_EAST : SOUTH_WEST);
constexpr Direction UpLeft = (Us == WHITE ? NORTH_WEST : SOUTH_EAST);
const Square ksq = pos.square<KING>(Them);
Bitboard emptySquares;
Bitboard pawnsOn7 = pos.pieces(Us, PAWN) & TRank7BB;
@@ -127,8 +85,6 @@ namespace {
if (Type == QUIET_CHECKS)
{
Square ksq = pos.square<KING>(Them);
b1 &= pos.attacks_from<PAWN>(ksq, Them);
b2 &= pos.attacks_from<PAWN>(ksq, Them);
@@ -136,10 +92,10 @@ namespace {
// if the pawn is not on the same file as the enemy king, because we
// don't generate captures. Note that a possible discovery check
// promotion has been already generated amongst the captures.
Bitboard dcCandidates = pos.blockers_for_king(Them);
if (pawnsNotOn7 & dcCandidates)
Bitboard dcCandidateQuiets = pos.blockers_for_king(Them) & pawnsNotOn7;
if (dcCandidateQuiets)
{
Bitboard dc1 = shift<Up>(pawnsNotOn7 & dcCandidates) & emptySquares & ~file_bb(ksq);
Bitboard dc1 = shift<Up>(dcCandidateQuiets) & emptySquares & ~file_bb(ksq);
Bitboard dc2 = shift<Up>(dc1 & TRank3BB) & emptySquares;
b1 |= dc1;
@@ -161,7 +117,7 @@ namespace {
}
// Promotions and underpromotions
if (pawnsOn7 && (Type != EVASIONS || (target & TRank8BB)))
if (pawnsOn7)
{
if (Type == CAPTURES)
emptySquares = ~pos.pieces();
@@ -173,8 +129,6 @@ namespace {
Bitboard b2 = shift<UpLeft >(pawnsOn7) & enemies;
Bitboard b3 = shift<Up >(pawnsOn7) & emptySquares;
Square ksq = pos.square<KING>(Them);
while (b1)
moveList = make_promotions<Type, UpRight>(moveList, pop_lsb(&b1), ksq);
@@ -230,7 +184,7 @@ namespace {
ExtMove* generate_moves(const Position& pos, ExtMove* moveList, Color us,
Bitboard target) {
assert(Pt != KING && Pt != PAWN);
static_assert(Pt != KING && Pt != PAWN, "Unsupported piece type in generate_moves()");
const Square* pl = pos.squares<Pt>(us);
@@ -262,7 +216,9 @@ namespace {
template<Color Us, GenType Type>
ExtMove* generate_all(const Position& pos, ExtMove* moveList, Bitboard target) {
constexpr bool Checks = Type == QUIET_CHECKS;
constexpr CastlingRights OO = Us & KING_SIDE;
constexpr CastlingRights OOO = Us & QUEEN_SIDE;
constexpr bool Checks = Type == QUIET_CHECKS; // Reduce template instantations
moveList = generate_pawn_moves<Us, Type>(pos, moveList, target);
moveList = generate_moves<KNIGHT, Checks>(pos, moveList, Us, target);
@@ -276,19 +232,14 @@ namespace {
Bitboard b = pos.attacks_from<KING>(ksq) & target;
while (b)
*moveList++ = make_move(ksq, pop_lsb(&b));
}
if (Type != CAPTURES && Type != EVASIONS && pos.can_castle(Us))
{
if (pos.is_chess960())
if (Type != CAPTURES && pos.can_castle(CastlingRights(OO | OOO)))
{
moveList = generate_castling<Us, KING_SIDE, Checks, true>(pos, moveList);
moveList = generate_castling<Us, QUEEN_SIDE, Checks, true>(pos, moveList);
}
else
{
moveList = generate_castling<Us, KING_SIDE, Checks, false>(pos, moveList);
moveList = generate_castling<Us, QUEEN_SIDE, Checks, false>(pos, moveList);
if (!pos.castling_impeded(OO) && pos.can_castle(OO))
*moveList++ = make<CASTLING>(ksq, pos.castling_rook_square(OO));
if (!pos.castling_impeded(OOO) && pos.can_castle(OOO))
*moveList++ = make<CASTLING>(ksq, pos.castling_rook_square(OOO));
}
}
@@ -298,19 +249,16 @@ namespace {
} // namespace
/// generate<CAPTURES> generates all pseudo-legal captures and queen
/// promotions. Returns a pointer to the end of the move list.
/// <CAPTURES> Generates all pseudo-legal captures and queen promotions
/// <QUIETS> Generates all pseudo-legal non-captures and underpromotions
/// <NON_EVASIONS> Generates all pseudo-legal captures and non-captures
///
/// generate<QUIETS> generates all pseudo-legal non-captures and
/// underpromotions. Returns a pointer to the end of the move list.
///
/// generate<NON_EVASIONS> generates all pseudo-legal captures and
/// non-captures. Returns a pointer to the end of the move list.
/// Returns a pointer to the end of the move list.
template<GenType Type>
ExtMove* generate(const Position& pos, ExtMove* moveList) {
assert(Type == CAPTURES || Type == QUIETS || Type == NON_EVASIONS);
static_assert(Type == CAPTURES || Type == QUIETS || Type == NON_EVASIONS, "Unsupported type in generate()");
assert(!pos.checkers());
Color us = pos.side_to_move();

2
DroidFishApp/src/main/cpp/stockfish/movegen.h
View File

@@ -2,7 +2,7 @@
Stockfish, a UCI chess playing engine derived from Glaurung 2.1
Copyright (C) 2004-2008 Tord Romstad (Glaurung author)
Copyright (C) 2008-2015 Marco Costalba, Joona Kiiski, Tord Romstad
Copyright (C) 2015-2019 Marco Costalba, Joona Kiiski, Gary Linscott, Tord Romstad
Copyright (C) 2015-2020 Marco Costalba, Joona Kiiski, Gary Linscott, Tord Romstad
Stockfish is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by

84
DroidFishApp/src/main/cpp/stockfish/movepick.cpp
View File

@@ -2,7 +2,7 @@
Stockfish, a UCI chess playing engine derived from Glaurung 2.1
Copyright (C) 2004-2008 Tord Romstad (Glaurung author)
Copyright (C) 2008-2015 Marco Costalba, Joona Kiiski, Tord Romstad
Copyright (C) 2015-2019 Marco Costalba, Joona Kiiski, Gary Linscott, Tord Romstad
Copyright (C) 2015-2020 Marco Costalba, Joona Kiiski, Gary Linscott, Tord Romstad
Stockfish is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
@@ -31,9 +31,6 @@ namespace {
QSEARCH_TT, QCAPTURE_INIT, QCAPTURE, QCHECK_INIT, QCHECK
};
// Helper filter used with select()
const auto Any = [](){ return true; };
// partial_insertion_sort() sorts moves in descending order up to and including
// a given limit. The order of moves smaller than the limit is left unspecified.
void partial_insertion_sort(ExtMove* begin, ExtMove* end, int limit) {
@@ -64,7 +61,7 @@ MovePicker::MovePicker(const Position& p, Move ttm, Depth d, const ButterflyHist
: pos(p), mainHistory(mh), captureHistory(cph), continuationHistory(ch),
refutations{{killers[0], 0}, {killers[1], 0}, {cm, 0}}, depth(d) {
assert(d > DEPTH_ZERO);
assert(d > 0);
stage = pos.checkers() ? EVASION_TT : MAIN_TT;
ttMove = ttm && pos.pseudo_legal(ttm) ? ttm : MOVE_NONE;
@@ -76,12 +73,12 @@ MovePicker::MovePicker(const Position& p, Move ttm, Depth d, const ButterflyHist
const CapturePieceToHistory* cph, const PieceToHistory** ch, Square rs)
: pos(p), mainHistory(mh), captureHistory(cph), continuationHistory(ch), recaptureSquare(rs), depth(d) {
assert(d <= DEPTH_ZERO);
assert(d <= 0);
stage = pos.checkers() ? EVASION_TT : QSEARCH_TT;
ttMove = ttm
&& pos.pseudo_legal(ttm)
&& (depth > DEPTH_QS_RECAPTURES || to_sq(ttm) == recaptureSquare) ? ttm : MOVE_NONE;
ttMove = ttm
&& (depth > DEPTH_QS_RECAPTURES || to_sq(ttm) == recaptureSquare)
&& pos.pseudo_legal(ttm) ? ttm : MOVE_NONE;
stage += (ttMove == MOVE_NONE);
}
@@ -94,8 +91,8 @@ MovePicker::MovePicker(const Position& p, Move ttm, Value th, const CapturePiece
stage = PROBCUT_TT;
ttMove = ttm
&& pos.pseudo_legal(ttm)
&& pos.capture(ttm)
&& pos.pseudo_legal(ttm)
&& pos.see_ge(ttm, threshold) ? ttm : MOVE_NONE;
stage += (ttMove == MOVE_NONE);
}
@@ -110,14 +107,15 @@ void MovePicker::score() {
for (auto& m : *this)
if (Type == CAPTURES)
m.value = PieceValue[MG][pos.piece_on(to_sq(m))]
+ (*captureHistory)[pos.moved_piece(m)][to_sq(m)][type_of(pos.piece_on(to_sq(m)))] / 8;
m.value = int(PieceValue[MG][pos.piece_on(to_sq(m))]) * 6
+ (*captureHistory)[pos.moved_piece(m)][to_sq(m)][type_of(pos.piece_on(to_sq(m)))];
else if (Type == QUIETS)
m.value = (*mainHistory)[pos.side_to_move()][from_to(m)]
+ (*continuationHistory[0])[pos.moved_piece(m)][to_sq(m)]
+ (*continuationHistory[1])[pos.moved_piece(m)][to_sq(m)]
+ (*continuationHistory[3])[pos.moved_piece(m)][to_sq(m)];
m.value = (*mainHistory)[pos.side_to_move()][from_to(m)]
+ 2 * (*continuationHistory[0])[pos.moved_piece(m)][to_sq(m)]
+ 2 * (*continuationHistory[1])[pos.moved_piece(m)][to_sq(m)]
+ 2 * (*continuationHistory[3])[pos.moved_piece(m)][to_sq(m)]
+ (*continuationHistory[5])[pos.moved_piece(m)][to_sq(m)];
else // Type == EVASIONS
{
@@ -141,12 +139,12 @@ Move MovePicker::select(Pred filter) {
if (T == Best)
std::swap(*cur, *std::max_element(cur, endMoves));
move = *cur++;
if (*cur != ttMove && filter())
return *cur++;
if (move != ttMove && filter())
return move;
cur++;
}
return move = MOVE_NONE;
return MOVE_NONE;
}
/// MovePicker::next_move() is the most important method of the MovePicker class. It
@@ -176,10 +174,10 @@ top:
case GOOD_CAPTURE:
if (select<Best>([&](){
return pos.see_ge(move, Value(-55 * (cur-1)->value / 1024)) ?
return pos.see_ge(*cur, Value(-55 * cur->value / 1024)) ?
// Move losing capture to endBadCaptures to be tried later
true : (*endBadCaptures++ = move, false); }))
return move;
true : (*endBadCaptures++ = *cur, false); }))
return *(cur - 1);
// Prepare the pointers to loop over the refutations array
cur = std::begin(refutations);
@@ -194,28 +192,32 @@ top:
/* fallthrough */
case REFUTATION:
if (select<Next>([&](){ return move != MOVE_NONE
&& !pos.capture(move)
&& pos.pseudo_legal(move); }))
return move;
if (select<Next>([&](){ return *cur != MOVE_NONE
&& !pos.capture(*cur)
&& pos.pseudo_legal(*cur); }))
return *(cur - 1);
++stage;
/* fallthrough */
case QUIET_INIT:
cur = endBadCaptures;
endMoves = generate<QUIETS>(pos, cur);
if (!skipQuiets)
{
cur = endBadCaptures;
endMoves = generate<QUIETS>(pos, cur);
score<QUIETS>();
partial_insertion_sort(cur, endMoves, -3000 * depth);
}
score<QUIETS>();
partial_insertion_sort(cur, endMoves, -4000 * depth / ONE_PLY);
++stage;
/* fallthrough */
case QUIET:
if ( !skipQuiets
&& select<Next>([&](){return move != refutations[0]
&& move != refutations[1]
&& move != refutations[2];}))
return move;
&& select<Next>([&](){return *cur != refutations[0].move
&& *cur != refutations[1].move
&& *cur != refutations[2].move;}))
return *(cur - 1);
// Prepare the pointers to loop over the bad captures
cur = moves;
@@ -225,7 +227,7 @@ top:
/* fallthrough */
case BAD_CAPTURE:
return select<Next>(Any);
return select<Next>([](){ return true; });
case EVASION_INIT:
cur = moves;
@@ -236,15 +238,15 @@ top:
/* fallthrough */
case EVASION:
return select<Best>(Any);
return select<Best>([](){ return true; });
case PROBCUT:
return select<Best>([&](){ return pos.see_ge(move, threshold); });
return select<Best>([&](){ return pos.see_ge(*cur, threshold); });
case QCAPTURE:
if (select<Best>([&](){ return depth > DEPTH_QS_RECAPTURES
|| to_sq(move) == recaptureSquare; }))
return move;
|| to_sq(*cur) == recaptureSquare; }))
return *(cur - 1);
// If we did not find any move and we do not try checks, we have finished
if (depth != DEPTH_QS_CHECKS)
@@ -261,7 +263,7 @@ top:
/* fallthrough */
case QCHECK:
return select<Next>(Any);
return select<Next>([](){ return true; });
}
assert(false);

9
DroidFishApp/src/main/cpp/stockfish/movepick.h
View File

@@ -2,7 +2,7 @@
Stockfish, a UCI chess playing engine derived from Glaurung 2.1
Copyright (C) 2004-2008 Tord Romstad (Glaurung author)
Copyright (C) 2008-2015 Marco Costalba, Joona Kiiski, Tord Romstad
Copyright (C) 2015-2019 Marco Costalba, Joona Kiiski, Gary Linscott, Tord Romstad
Copyright (C) 2015-2020 Marco Costalba, Joona Kiiski, Gary Linscott, Tord Romstad
Stockfish is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
@@ -80,16 +80,16 @@ struct Stats<T, D, Size> : public std::array<StatsEntry<T, D>, Size> {};
/// In stats table, D=0 means that the template parameter is not used
enum StatsParams { NOT_USED = 0 };
enum StatsType { NoCaptures, Captures };
/// ButterflyHistory records how often quiet moves have been successful or
/// unsuccessful during the current search, and is used for reduction and move
/// ordering decisions. It uses 2 tables (one for each color) indexed by
/// the move's from and to squares, see chessprogramming.wikispaces.com/Butterfly+Boards
/// the move's from and to squares, see www.chessprogramming.org/Butterfly_Boards
typedef Stats<int16_t, 10692, COLOR_NB, int(SQUARE_NB) * int(SQUARE_NB)> ButterflyHistory;
/// CounterMoveHistory stores counter moves indexed by [piece][to] of the previous
/// move, see chessprogramming.wikispaces.com/Countermove+Heuristic
/// move, see www.chessprogramming.org/Countermove_Heuristic
typedef Stats<Move, NOT_USED, PIECE_NB, SQUARE_NB> CounterMoveHistory;
/// CapturePieceToHistory is addressed by a move's [piece][to][captured piece type]
@@ -142,7 +142,6 @@ private:
Move ttMove;
ExtMove refutations[3], *cur, *endMoves, *endBadCaptures;
int stage;
Move move;
Square recaptureSquare;
Value threshold;
Depth depth;

198
DroidFishApp/src/main/cpp/stockfish/pawns.cpp
View File

@@ -2,7 +2,7 @@
Stockfish, a UCI chess playing engine derived from Glaurung 2.1
Copyright (C) 2004-2008 Tord Romstad (Glaurung author)
Copyright (C) 2008-2015 Marco Costalba, Joona Kiiski, Tord Romstad
Copyright (C) 2015-2019 Marco Costalba, Joona Kiiski, Gary Linscott, Tord Romstad
Copyright (C) 2015-2020 Marco Costalba, Joona Kiiski, Gary Linscott, Tord Romstad
Stockfish is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
@@ -32,12 +32,15 @@ namespace {
#define S(mg, eg) make_score(mg, eg)
// Pawn penalties
constexpr Score Backward = S( 9, 24);
constexpr Score Doubled = S(11, 56);
constexpr Score Isolated = S( 5, 15);
constexpr Score Backward = S( 9, 24);
constexpr Score BlockedStorm = S(82, 82);
constexpr Score Doubled = S(11, 56);
constexpr Score Isolated = S( 5, 15);
constexpr Score WeakLever = S( 0, 56);
constexpr Score WeakUnopposed = S(13, 27);
// Connected pawn bonus by opposed, phalanx, #support and rank
Score Connected[2][2][3][RANK_NB];
// Connected pawn bonus
constexpr int Connected[RANK_NB] = { 0, 7, 8, 12, 29, 48, 86 };
// Strength of pawn shelter for our king by [distance from edge][rank].
// RANK_1 = 0 is used for files where we have no pawn, or pawn is behind our king.
@@ -50,12 +53,13 @@ namespace {
// Danger of enemy pawns moving toward our king by [distance from edge][rank].
// RANK_1 = 0 is used for files where the enemy has no pawn, or their pawn
// is behind our king.
// is behind our king. Note that UnblockedStorm[0][1-2] accommodate opponent pawn
// on edge, likely blocked by our king.
constexpr Value UnblockedStorm[int(FILE_NB) / 2][RANK_NB] = {
{ V( 89), V(107), V(123), V(93), V(57), V( 45), V( 51) },
{ V( 44), V(-18), V(123), V(46), V(39), V( -7), V( 23) },
{ V( 4), V( 52), V(162), V(37), V( 7), V(-14), V( -2) },
{ V(-10), V(-14), V( 90), V(15), V( 2), V( -7), V(-16) }
{ V( 85), V(-289), V(-166), V(97), V(50), V( 45), V( 50) },
{ V( 46), V( -25), V( 122), V(45), V(37), V(-10), V( 20) },
{ V( -6), V( 51), V( 168), V(34), V(-2), V(-22), V(-14) },
{ V(-15), V( -11), V( 101), V( 4), V(11), V(-15), V(-29) }
};
#undef S
@@ -65,80 +69,86 @@ namespace {
Score evaluate(const Position& pos, Pawns::Entry* e) {
constexpr Color Them = (Us == WHITE ? BLACK : WHITE);
constexpr Direction Up = (Us == WHITE ? NORTH : SOUTH);
constexpr Direction Up = pawn_push(Us);
Bitboard b, neighbours, stoppers, doubled, supported, phalanx;
Bitboard lever, leverPush;
Bitboard neighbours, stoppers, support, phalanx, opposed;
Bitboard lever, leverPush, blocked;
Square s;
bool opposed, backward;
bool backward, passed, doubled;
Score score = SCORE_ZERO;
const Square* pl = pos.squares<PAWN>(Us);
Bitboard ourPawns = pos.pieces( Us, PAWN);
Bitboard theirPawns = pos.pieces(Them, PAWN);
e->passedPawns[Us] = e->pawnAttacksSpan[Us] = e->weakUnopposed[Us] = 0;
e->semiopenFiles[Us] = 0xFF;
e->kingSquares[Us] = SQ_NONE;
e->pawnAttacks[Us] = pawn_attacks_bb<Us>(ourPawns);
e->pawnsOnSquares[Us][BLACK] = popcount(ourPawns & DarkSquares);
e->pawnsOnSquares[Us][WHITE] = pos.count<PAWN>(Us) - e->pawnsOnSquares[Us][BLACK];
Bitboard doubleAttackThem = pawn_double_attacks_bb<Them>(theirPawns);
e->passedPawns[Us] = 0;
e->kingSquares[Us] = SQ_NONE;
e->pawnAttacks[Us] = e->pawnAttacksSpan[Us] = pawn_attacks_bb<Us>(ourPawns);
// Loop through all pawns of the current color and score each pawn
while ((s = *pl++) != SQ_NONE)
{
assert(pos.piece_on(s) == make_piece(Us, PAWN));
File f = file_of(s);
e->semiopenFiles[Us] &= ~(1 << f);
e->pawnAttacksSpan[Us] |= pawn_attack_span(Us, s);
Rank r = relative_rank(Us, s);
// Flag the pawn
opposed = theirPawns & forward_file_bb(Us, s);
stoppers = theirPawns & passed_pawn_mask(Us, s);
blocked = theirPawns & (s + Up);
stoppers = theirPawns & passed_pawn_span(Us, s);
lever = theirPawns & PawnAttacks[Us][s];
leverPush = theirPawns & PawnAttacks[Us][s + Up];
doubled = ourPawns & (s - Up);
neighbours = ourPawns & adjacent_files_bb(f);
neighbours = ourPawns & adjacent_files_bb(s);
phalanx = neighbours & rank_bb(s);
supported = neighbours & rank_bb(s - Up);
support = neighbours & rank_bb(s - Up);
// A pawn is backward when it is behind all pawns of the same color
// on the adjacent files and cannot be safely advanced.
backward = !(ourPawns & pawn_attack_span(Them, s + Up))
&& (stoppers & (leverPush | (s + Up)));
// A pawn is backward when it is behind all pawns of the same color on
// the adjacent files and cannot safely advance.
backward = !(neighbours & forward_ranks_bb(Them, s + Up))
&& (leverPush | blocked);
// Passed pawns will be properly scored in evaluation because we need
// full attack info to evaluate them. Include also not passed pawns
// which could become passed after one or two pawn pushes when are
// not attacked more times than defended.
if ( !(stoppers ^ lever ^ leverPush)
&& popcount(supported) >= popcount(lever) - 1
&& popcount(phalanx) >= popcount(leverPush))
// Compute additional span if pawn is not backward nor blocked
if (!backward && !blocked)
e->pawnAttacksSpan[Us] |= pawn_attack_span(Us, s);
// A pawn is passed if one of the three following conditions is true:
// (a) there is no stoppers except some levers
// (b) the only stoppers are the leverPush, but we outnumber them
// (c) there is only one front stopper which can be levered.
passed = !(stoppers ^ lever)
|| ( !(stoppers ^ leverPush)
&& popcount(phalanx) >= popcount(leverPush))
|| ( stoppers == blocked && r >= RANK_5
&& (shift<Up>(support) & ~(theirPawns | doubleAttackThem)));
// Passed pawns will be properly scored later in evaluation when we have
// full attack info.
if (passed)
e->passedPawns[Us] |= s;
else if ( stoppers == SquareBB[s + Up]
&& relative_rank(Us, s) >= RANK_5)
// Score this pawn
if (support | phalanx)
{
b = shift<Up>(supported) & ~theirPawns;
while (b)
if (!more_than_one(theirPawns & PawnAttacks[Us][pop_lsb(&b)]))
e->passedPawns[Us] |= s;
int v = Connected[r] * (2 + bool(phalanx) - bool(opposed))
+ 21 * popcount(support);
score += make_score(v, v * (r - 2) / 4);
}
// Score this pawn
if (supported | phalanx)
score += Connected[opposed][bool(phalanx)][popcount(supported)][relative_rank(Us, s)];
else if (!neighbours)
score -= Isolated, e->weakUnopposed[Us] += !opposed;
score -= Isolated
+ WeakUnopposed * !opposed;
else if (backward)
score -= Backward, e->weakUnopposed[Us] += !opposed;
score -= Backward
+ WeakUnopposed * !opposed;
if (doubled && !supported)
score -= Doubled;
if (!support)
score -= Doubled * doubled
+ WeakLever * more_than_one(lever);
}
return score;
@@ -148,27 +158,6 @@ namespace {
namespace Pawns {
/// Pawns::init() initializes some tables needed by evaluation. Instead of using
/// hard-coded tables, when makes sense, we prefer to calculate them with a formula
/// to reduce independent parameters and to allow easier tuning and better insight.
void init() {
static constexpr int Seed[RANK_NB] = { 0, 13, 24, 18, 65, 100, 175, 330 };
for (int opposed = 0; opposed <= 1; ++opposed)
for (int phalanx = 0; phalanx <= 1; ++phalanx)
for (int support = 0; support <= 2; ++support)
for (Rank r = RANK_2; r < RANK_8; ++r)
{
int v = 17 * support;
v += (Seed[r] + (phalanx ? (Seed[r + 1] - Seed[r]) / 2 : 0)) >> opposed;
Connected[opposed][phalanx][support][r] = make_score(v, v * (r - 2) / 4);
}
}
/// Pawns::probe() looks up the current position's pawns configuration in
/// the pawns hash table. It returns a pointer to the Entry if the position
/// is found. Otherwise a new Entry is computed and stored there, so we don't
@@ -185,9 +174,6 @@ Entry* probe(const Position& pos) {
e->key = key;
e->scores[WHITE] = evaluate<WHITE>(pos, e);
e->scores[BLACK] = evaluate<BLACK>(pos, e);
e->openFiles = popcount(e->semiopenFiles[WHITE] & e->semiopenFiles[BLACK]);
e->asymmetry = popcount( (e->passedPawns[WHITE] | e->passedPawns[BLACK])
| (e->semiopenFiles[WHITE] ^ e->semiopenFiles[BLACK]));
return e;
}
@@ -197,35 +183,35 @@ Entry* probe(const Position& pos) {
/// penalty for a king, looking at the king file and the two closest files.
template<Color Us>
Value Entry::evaluate_shelter(const Position& pos, Square ksq) {
Score Entry::evaluate_shelter(const Position& pos, Square ksq) {
constexpr Color Them = (Us == WHITE ? BLACK : WHITE);
constexpr Direction Down = (Us == WHITE ? SOUTH : NORTH);
constexpr Bitboard BlockRanks = (Us == WHITE ? Rank1BB | Rank2BB : Rank8BB | Rank7BB);
constexpr Color Them = (Us == WHITE ? BLACK : WHITE);
Bitboard b = pos.pieces(PAWN) & ~forward_ranks_bb(Them, ksq);
Bitboard ourPawns = b & pos.pieces(Us);
Bitboard theirPawns = b & pos.pieces(Them);
Value safety = (shift<Down>(theirPawns) & (FileABB | FileHBB) & BlockRanks & ksq) ?
Value(374) : Value(5);
Score bonus = make_score(5, 5);
File center = std::max(FILE_B, std::min(FILE_G, file_of(ksq)));
File center = clamp(file_of(ksq), FILE_B, FILE_G);
for (File f = File(center - 1); f <= File(center + 1); ++f)
{
b = ourPawns & file_bb(f);
int ourRank = b ? relative_rank(Us, backmost_sq(Us, b)) : 0;
int ourRank = b ? relative_rank(Us, frontmost_sq(Them, b)) : 0;
b = theirPawns & file_bb(f);
int theirRank = b ? relative_rank(Us, frontmost_sq(Them, b)) : 0;
int d = std::min(f, ~f);
safety += ShelterStrength[d][ourRank];
safety -= (ourRank && (ourRank == theirRank - 1)) ? 66 * (theirRank == RANK_3)
: UnblockedStorm[d][theirRank];
File d = map_to_queenside(f);
bonus += make_score(ShelterStrength[d][ourRank], 0);
if (ourRank && (ourRank == theirRank - 1))
bonus -= BlockedStorm * int(theirRank == RANK_3);
else
bonus -= make_score(UnblockedStorm[d][theirRank], 0);
}
return safety;
return bonus;
}
@@ -237,23 +223,29 @@ Score Entry::do_king_safety(const Position& pos) {
Square ksq = pos.square<KING>(Us);
kingSquares[Us] = ksq;
castlingRights[Us] = pos.can_castle(Us);
int minKingPawnDistance = 0;
castlingRights[Us] = pos.castling_rights(Us);
auto compare = [](Score a, Score b) { return mg_value(a) < mg_value(b); };
Score shelter = evaluate_shelter<Us>(pos, ksq);
// If we can castle use the bonus after castling if it is bigger
if (pos.can_castle(Us & KING_SIDE))
shelter = std::max(shelter, evaluate_shelter<Us>(pos, relative_square(Us, SQ_G1)), compare);
if (pos.can_castle(Us & QUEEN_SIDE))
shelter = std::max(shelter, evaluate_shelter<Us>(pos, relative_square(Us, SQ_C1)), compare);
// In endgame we like to bring our king near our closest pawn
Bitboard pawns = pos.pieces(Us, PAWN);
if (pawns)
while (!(DistanceRingBB[ksq][++minKingPawnDistance] & pawns)) {}
int minPawnDist = pawns ? 8 : 0;
Value bonus = evaluate_shelter<Us>(pos, ksq);
if (pawns & PseudoAttacks[KING][ksq])
minPawnDist = 1;
else while (pawns)
minPawnDist = std::min(minPawnDist, distance(ksq, pop_lsb(&pawns)));
// If we can castle use the bonus after the castling if it is bigger
if (pos.can_castle(Us | KING_SIDE))
bonus = std::max(bonus, evaluate_shelter<Us>(pos, relative_square(Us, SQ_G1)));
if (pos.can_castle(Us | QUEEN_SIDE))
bonus = std::max(bonus, evaluate_shelter<Us>(pos, relative_square(Us, SQ_C1)));
return make_score(bonus, -16 * minKingPawnDistance);
return shelter - make_score(0, 16 * minPawnDist);
}
// Explicit template instantiation

26
DroidFishApp/src/main/cpp/stockfish/pawns.h
View File

@@ -2,7 +2,7 @@
Stockfish, a UCI chess playing engine derived from Glaurung 2.1
Copyright (C) 2004-2008 Tord Romstad (Glaurung author)
Copyright (C) 2008-2015 Marco Costalba, Joona Kiiski, Tord Romstad
Copyright (C) 2015-2019 Marco Costalba, Joona Kiiski, Gary Linscott, Tord Romstad
Copyright (C) 2015-2020 Marco Costalba, Joona Kiiski, Gary Linscott, Tord Romstad
Stockfish is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
@@ -37,21 +37,11 @@ struct Entry {
Bitboard pawn_attacks(Color c) const { return pawnAttacks[c]; }
Bitboard passed_pawns(Color c) const { return passedPawns[c]; }
Bitboard pawn_attacks_span(Color c) const { return pawnAttacksSpan[c]; }
int weak_unopposed(Color c) const { return weakUnopposed[c]; }
int pawn_asymmetry() const { return asymmetry; }
int open_files() const { return openFiles; }
int semiopen_file(Color c, File f) const {
return semiopenFiles[c] & (1 << f);
}
int pawns_on_same_color_squares(Color c, Square s) const {
return pawnsOnSquares[c][bool(DarkSquares & s)];
}
int passed_count() const { return popcount(passedPawns[WHITE] | passedPawns[BLACK]); }
template<Color Us>
Score king_safety(const Position& pos) {
return kingSquares[Us] == pos.square<KING>(Us) && castlingRights[Us] == pos.can_castle(Us)
return kingSquares[Us] == pos.square<KING>(Us) && castlingRights[Us] == pos.castling_rights(Us)
? kingSafety[Us] : (kingSafety[Us] = do_king_safety<Us>(pos));
}
@@ -59,7 +49,7 @@ struct Entry {
Score do_king_safety(const Position& pos);
template<Color Us>
Value evaluate_shelter(const Position& pos, Square ksq);
Score evaluate_shelter(const Position& pos, Square ksq);
Key key;
Score scores[COLOR_NB];
@@ -68,17 +58,11 @@ struct Entry {
Bitboard pawnAttacksSpan[COLOR_NB];
Square kingSquares[COLOR_NB];
Score kingSafety[COLOR_NB];
int weakUnopposed[COLOR_NB];
int castlingRights[COLOR_NB];
int semiopenFiles[COLOR_NB];
int pawnsOnSquares[COLOR_NB][COLOR_NB]; // [color][light/dark squares]
int asymmetry;
int openFiles;
};
typedef HashTable<Entry, 16384> Table;
typedef HashTable<Entry, 131072> Table;
void init();
Entry* probe(const Position& pos);
} // namespace Pawns

347
DroidFishApp/src/main/cpp/stockfish/position.cpp
View File

@@ -2,7 +2,7 @@
Stockfish, a UCI chess playing engine derived from Glaurung 2.1
Copyright (C) 2004-2008 Tord Romstad (Glaurung author)
Copyright (C) 2008-2015 Marco Costalba, Joona Kiiski, Tord Romstad
Copyright (C) 2015-2019 Marco Costalba, Joona Kiiski, Gary Linscott, Tord Romstad
Copyright (C) 2015-2020 Marco Costalba, Joona Kiiski, Gary Linscott, Tord Romstad
Stockfish is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
@@ -50,41 +50,6 @@ const string PieceToChar(" PNBRQK pnbrqk");
constexpr Piece Pieces[] = { W_PAWN, W_KNIGHT, W_BISHOP, W_ROOK, W_QUEEN, W_KING,
B_PAWN, B_KNIGHT, B_BISHOP, B_ROOK, B_QUEEN, B_KING };
// min_attacker() is a helper function used by see_ge() to locate the least
// valuable attacker for the side to move, remove the attacker we just found
// from the bitboards and scan for new X-ray attacks behind it.
template<int Pt>
PieceType min_attacker(const Bitboard* byTypeBB, Square to, Bitboard stmAttackers,
Bitboard& occupied, Bitboard& attackers) {
Bitboard b = stmAttackers & byTypeBB[Pt];
if (!b)
return min_attacker<Pt + 1>(byTypeBB, to, stmAttackers, occupied, attackers);
occupied ^= lsb(b); // Remove the attacker from occupied
// Add any X-ray attack behind the just removed piece. For instance with
// rooks in a8 and a7 attacking a1, after removing a7 we add rook in a8.
// Note that new added attackers can be of any color.
if (Pt == PAWN || Pt == BISHOP || Pt == QUEEN)
attackers |= attacks_bb<BISHOP>(to, occupied) & (byTypeBB[BISHOP] | byTypeBB[QUEEN]);
if (Pt == ROOK || Pt == QUEEN)
attackers |= attacks_bb<ROOK>(to, occupied) & (byTypeBB[ROOK] | byTypeBB[QUEEN]);
// X-ray may add already processed pieces because byTypeBB[] is constant: in
// the rook example, now attackers contains _again_ rook in a7, so remove it.
attackers &= occupied;
return (PieceType)Pt;
}
template<>
PieceType min_attacker<KING>(const Bitboard*, Square, Bitboard, Bitboard&, Bitboard&) {
return KING; // No need to update bitboards: it is the last cycle
}
} // namespace
@@ -183,7 +148,7 @@ void Position::init() {
{
std::swap(cuckoo[i], key);
std::swap(cuckooMove[i], move);
if (move == 0) // Arrived at empty slot ?
if (move == MOVE_NONE) // Arrived at empty slot?
break;
i = (i == H1(key)) ? H2(key) : H1(key); // Push victim to alternative slot
}
@@ -330,24 +295,18 @@ Position& Position::set(const string& fenStr, bool isChess960, StateInfo* si, Th
void Position::set_castling_right(Color c, Square rfrom) {
Square kfrom = square<KING>(c);
CastlingSide cs = kfrom < rfrom ? KING_SIDE : QUEEN_SIDE;
CastlingRight cr = (c | cs);
CastlingRights cr = c & (kfrom < rfrom ? KING_SIDE: QUEEN_SIDE);
st->castlingRights |= cr;
castlingRightsMask[kfrom] |= cr;
castlingRightsMask[rfrom] |= cr;
castlingRookSquare[cr] = rfrom;
Square kto = relative_square(c, cs == KING_SIDE ? SQ_G1 : SQ_C1);
Square rto = relative_square(c, cs == KING_SIDE ? SQ_F1 : SQ_D1);
Square kto = relative_square(c, cr & KING_SIDE ? SQ_G1 : SQ_C1);
Square rto = relative_square(c, cr & KING_SIDE ? SQ_F1 : SQ_D1);
for (Square s = std::min(rfrom, rto); s <= std::max(rfrom, rto); ++s)
if (s != kfrom && s != rfrom)
castlingPath[cr] |= s;
for (Square s = std::min(kfrom, kto); s <= std::max(kfrom, kto); ++s)
if (s != kfrom && s != rfrom)
castlingPath[cr] |= s;
castlingPath[cr] = (between_bb(rfrom, rto) | between_bb(kfrom, kto) | rto | kto)
& ~(square_bb(kfrom) | rfrom);
}
@@ -388,6 +347,12 @@ void Position::set_state(StateInfo* si) const {
Square s = pop_lsb(&b);
Piece pc = piece_on(s);
si->key ^= Zobrist::psq[pc][s];
if (type_of(pc) == PAWN)
si->pawnKey ^= Zobrist::psq[pc][s];
else if (type_of(pc) != KING)
si->nonPawnMaterial[color_of(pc)] += PieceValue[MG][pc];
}
if (si->epSquare != SQ_NONE)
@@ -398,20 +363,9 @@ void Position::set_state(StateInfo* si) const {
si->key ^= Zobrist::castling[si->castlingRights];
for (Bitboard b = pieces(PAWN); b; )
{
Square s = pop_lsb(&b);
si->pawnKey ^= Zobrist::psq[piece_on(s)][s];
}
for (Piece pc : Pieces)
{
if (type_of(pc) != PAWN && type_of(pc) != KING)
si->nonPawnMaterial[color_of(pc)] += pieceCount[pc] * PieceValue[MG][pc];
for (int cnt = 0; cnt < pieceCount[pc]; ++cnt)
si->materialKey ^= Zobrist::psq[pc][cnt];
}
}
@@ -465,18 +419,18 @@ const string Position::fen() const {
ss << (sideToMove == WHITE ? " w " : " b ");
if (can_castle(WHITE_OO))
ss << (chess960 ? char('A' + file_of(castling_rook_square(WHITE | KING_SIDE))) : 'K');
ss << (chess960 ? char('A' + file_of(castling_rook_square(WHITE_OO ))) : 'K');
if (can_castle(WHITE_OOO))
ss << (chess960 ? char('A' + file_of(castling_rook_square(WHITE | QUEEN_SIDE))) : 'Q');
ss << (chess960 ? char('A' + file_of(castling_rook_square(WHITE_OOO))) : 'Q');
if (can_castle(BLACK_OO))
ss << (chess960 ? char('a' + file_of(castling_rook_square(BLACK | KING_SIDE))) : 'k');
ss << (chess960 ? char('a' + file_of(castling_rook_square(BLACK_OO ))) : 'k');
if (can_castle(BLACK_OOO))
ss << (chess960 ? char('a' + file_of(castling_rook_square(BLACK | QUEEN_SIDE))) : 'q');
ss << (chess960 ? char('a' + file_of(castling_rook_square(BLACK_OOO))) : 'q');
if (!can_castle(WHITE) && !can_castle(BLACK))
if (!can_castle(ANY_CASTLING))
ss << '-';
ss << (ep_square() == SQ_NONE ? " - " : " " + UCI::square(ep_square()) + " ")
@@ -498,14 +452,15 @@ Bitboard Position::slider_blockers(Bitboard sliders, Square s, Bitboard& pinners
Bitboard blockers = 0;
pinners = 0;
// Snipers are sliders that attack 's' when a piece is removed
// Snipers are sliders that attack 's' when a piece and other snipers are removed
Bitboard snipers = ( (PseudoAttacks[ ROOK][s] & pieces(QUEEN, ROOK))
| (PseudoAttacks[BISHOP][s] & pieces(QUEEN, BISHOP))) & sliders;
Bitboard occupancy = pieces() ^ snipers;
while (snipers)
{
Square sniperSq = pop_lsb(&snipers);
Bitboard b = between_bb(s, sniperSq) & pieces();
Bitboard b = between_bb(s, sniperSq) & occupancy;
if (b && !more_than_one(b))
{
@@ -540,6 +495,7 @@ bool Position::legal(Move m) const {
Color us = sideToMove;
Square from = from_sq(m);
Square to = to_sq(m);
assert(color_of(moved_piece(m)) == us);
assert(piece_on(square<KING>(us)) == make_piece(us, KING));
@@ -550,7 +506,6 @@ bool Position::legal(Move m) const {
if (type_of(m) == ENPASSANT)
{
Square ksq = square<KING>(us);
Square to = to_sq(m);
Square capsq = to - pawn_push(us);
Bitboard occupied = (pieces() ^ from ^ capsq) | to;
@@ -563,16 +518,35 @@ bool Position::legal(Move m) const {
&& !(attacks_bb<BISHOP>(ksq, occupied) & pieces(~us, QUEEN, BISHOP));
}
// If the moving piece is a king, check whether the destination
// square is attacked by the opponent. Castling moves are checked
// for legality during move generation.
// Castling moves generation does not check if the castling path is clear of
// enemy attacks, it is delayed at a later time: now!
if (type_of(m) == CASTLING)
{
// After castling, the rook and king final positions are the same in
// Chess960 as they would be in standard chess.
to = relative_square(us, to > from ? SQ_G1 : SQ_C1);
Direction step = to > from ? WEST : EAST;
for (Square s = to; s != from; s += step)
if (attackers_to(s) & pieces(~us))
return false;
// In case of Chess960, verify that when moving the castling rook we do
// not discover some hidden checker.
// For instance an enemy queen in SQ_A1 when castling rook is in SQ_B1.
return !chess960
|| !(attacks_bb<ROOK>(to, pieces() ^ to_sq(m)) & pieces(~us, ROOK, QUEEN));
}
// If the moving piece is a king, check whether the destination square is
// attacked by the opponent.
if (type_of(piece_on(from)) == KING)
return type_of(m) == CASTLING || !(attackers_to(to_sq(m)) & pieces(~us));
return !(attackers_to(to) & pieces(~us));
// A non-king move is legal if and only if it is not pinned or it
// is moving along the ray towards or away from the king.
return !(blockers_for_king(us) & from)
|| aligned(from, to_sq(m), square<KING>(us));
|| aligned(from, to, square<KING>(us));
}
@@ -609,7 +583,7 @@ bool Position::pseudo_legal(const Move m) const {
{
// We have already handled promotion moves, so destination
// cannot be on the 8th/1st rank.
if (rank_of(to) == relative_rank(us, RANK_8))
if ((Rank8BB | Rank1BB) & to)
return false;
if ( !(attacks_from<PAWN>(from, us) & pieces(~us) & to) // Not a capture
@@ -843,9 +817,8 @@ void Position::do_move(Move m, StateInfo& newSt, bool givesCheck) {
st->nonPawnMaterial[us] += PieceValue[MG][promotion];
}
// Update pawn hash key and prefetch access to pawnsTable
// Update pawn hash key
st->pawnKey ^= Zobrist::psq[pc][from] ^ Zobrist::psq[pc][to];
prefetch2(thisThread->pawnsTable[st->pawnKey]);
// Reset rule 50 draw counter
st->rule50 = 0;
@@ -865,6 +838,25 @@ void Position::do_move(Move m, StateInfo& newSt, bool givesCheck) {
// Update king attacks used for fast check detection
set_check_info(st);
// Calculate the repetition info. It is the ply distance from the previous
// occurrence of the same position, negative in the 3-fold case, or zero
// if the position was not repeated.
st->repetition = 0;
int end = std::min(st->rule50, st->pliesFromNull);
if (end >= 4)
{
StateInfo* stp = st->previous->previous;
for (int i = 4; i <= end; i += 2)
{
stp = stp->previous->previous;
if (stp->key == st->key)
{
st->repetition = stp->repetition ? -i : i;
break;
}
}
}
assert(pos_is_ok());
}
@@ -952,7 +944,7 @@ void Position::do_castling(Color us, Square from, Square& to, Square& rfrom, Squ
}
/// Position::do(undo)_null_move() is used to do(undo) a "null move": It flips
/// Position::do(undo)_null_move() is used to do(undo) a "null move": it flips
/// the side to move without executing any move on the board.
void Position::do_null_move(StateInfo& newSt) {
@@ -980,6 +972,8 @@ void Position::do_null_move(StateInfo& newSt) {
set_check_info(st);
st->repetition = 0;
assert(pos_is_ok());
}
@@ -1023,77 +1017,96 @@ bool Position::see_ge(Move m, Value threshold) const {
if (type_of(m) != NORMAL)
return VALUE_ZERO >= threshold;
Bitboard stmAttackers;
Square from = from_sq(m), to = to_sq(m);
PieceType nextVictim = type_of(piece_on(from));
Color us = color_of(piece_on(from));
Color stm = ~us; // First consider opponent's move
Value balance; // Values of the pieces taken by us minus opponent's ones
// The opponent may be able to recapture so this is the best result
// we can hope for.
balance = PieceValue[MG][piece_on(to)] - threshold;
if (balance < VALUE_ZERO)
int swap = PieceValue[MG][piece_on(to)] - threshold;
if (swap < 0)
return false;
// Now assume the worst possible result: that the opponent can
// capture our piece for free.
balance -= PieceValue[MG][nextVictim];
// If it is enough (like in PxQ) then return immediately. Note that
// in case nextVictim == KING we always return here, this is ok
// if the given move is legal.
if (balance >= VALUE_ZERO)
swap = PieceValue[MG][piece_on(from)] - swap;
if (swap <= 0)
return true;
// Find all attackers to the destination square, with the moving piece
// removed, but possibly an X-ray attacker added behind it.
Bitboard occupied = pieces() ^ from ^ to;
Bitboard attackers = attackers_to(to, occupied) & occupied;
Color stm = color_of(piece_on(from));
Bitboard attackers = attackers_to(to, occupied);
Bitboard stmAttackers, bb;
int res = 1;
while (true)
{
stmAttackers = attackers & pieces(stm);
// Don't allow pinned pieces to attack (except the king) as long as
// all pinners are on their original square.
if (!(st->pinners[~stm] & ~occupied))
stmAttackers &= ~st->blockersForKing[stm];
stm = ~stm;
attackers &= occupied;
// If stm has no more attackers then give up: stm loses
if (!(stmAttackers = attackers & pieces(stm)))
break;
// Don't allow pinned pieces to attack (except the king) as long as
// there are pinners on their original square.
if (st->pinners[~stm] & occupied)
stmAttackers &= ~st->blockersForKing[stm];
if (!stmAttackers)
break;
res ^= 1;
// Locate and remove the next least valuable attacker, and add to
// the bitboard 'attackers' the possibly X-ray attackers behind it.
nextVictim = min_attacker<PAWN>(byTypeBB, to, stmAttackers, occupied, attackers);
stm = ~stm; // Switch side to move
// Negamax the balance with alpha = balance, beta = balance+1 and
// add nextVictim's value.
//
// (balance, balance+1) -> (-balance-1, -balance)
//
assert(balance < VALUE_ZERO);
balance = -balance - 1 - PieceValue[MG][nextVictim];
// If balance is still non-negative after giving away nextVictim then we
// win. The only thing to be careful about it is that we should revert
// stm if we captured with the king when the opponent still has attackers.
if (balance >= VALUE_ZERO)
// the bitboard 'attackers' any X-ray attackers behind it.
if ((bb = stmAttackers & pieces(PAWN)))
{
if (nextVictim == KING && (attackers & pieces(stm)))
stm = ~stm;
break;
}
assert(nextVictim != KING);
}
return us != stm; // We break the above loop when stm loses
}
if ((swap = PawnValueMg - swap) < res)
break;
occupied ^= lsb(bb);
attackers |= attacks_bb<BISHOP>(to, occupied) & pieces(BISHOP, QUEEN);
}
else if ((bb = stmAttackers & pieces(KNIGHT)))
{
if ((swap = KnightValueMg - swap) < res)
break;
occupied ^= lsb(bb);
}
else if ((bb = stmAttackers & pieces(BISHOP)))
{
if ((swap = BishopValueMg - swap) < res)
break;
occupied ^= lsb(bb);
attackers |= attacks_bb<BISHOP>(to, occupied) & pieces(BISHOP, QUEEN);
}
else if ((bb = stmAttackers & pieces(ROOK)))
{
if ((swap = RookValueMg - swap) < res)
break;
occupied ^= lsb(bb);
attackers |= attacks_bb<ROOK>(to, occupied) & pieces(ROOK, QUEEN);
}
else if ((bb = stmAttackers & pieces(QUEEN)))
{
if ((swap = QueenValueMg - swap) < res)
break;
occupied ^= lsb(bb);
attackers |= (attacks_bb<BISHOP>(to, occupied) & pieces(BISHOP, QUEEN))
| (attacks_bb<ROOK >(to, occupied) & pieces(ROOK , QUEEN));
}
else // KING
// If we "capture" with the king but opponent still has attackers,
// reverse the result.
return (attackers & ~pieces(stm)) ? res ^ 1 : res;
}
return bool(res);
}
/// Position::is_draw() tests whether the position is drawn by 50-move rule
/// or by repetition. It does not detect stalemates.
@@ -1103,24 +1116,10 @@ bool Position::is_draw(int ply) const {
if (st->rule50 > 99 && (!checkers() || MoveList<LEGAL>(*this).size()))
return true;
int end = std::min(st->rule50, st->pliesFromNull);
if (end < 4)
return false;
StateInfo* stp = st->previous->previous;
int cnt = 0;
for (int i = 4; i <= end; i += 2)
{
stp = stp->previous->previous;
// Return a draw score if a position repeats once earlier but strictly
// after the root, or repeats twice before or at the root.
if ( stp->key == st->key
&& ++cnt + (ply > i) == 2)
return true;
}
// Return a draw score if a position repeats once earlier but strictly
// after the root, or repeats twice before or at the root.
if (st->repetition && st->repetition < ply)
return true;
return false;
}
@@ -1132,26 +1131,15 @@ bool Position::is_draw(int ply) const {
bool Position::has_repeated() const {
StateInfo* stc = st;
while (true)
int end = std::min(st->rule50, st->pliesFromNull);
while (end-- >= 4)
{
int i = 4, end = std::min(stc->rule50, stc->pliesFromNull);
if (end < i)
return false;
StateInfo* stp = stc->previous->previous;
do {
stp = stp->previous->previous;
if (stp->key == stc->key)
return true;
i += 2;
} while (i <= end);
if (stc->repetition)
return true;
stc = stc->previous;
}
return false;
}
@@ -1184,22 +1172,19 @@ bool Position::has_game_cycle(int ply) const {
if (!(between_bb(s1, s2) & pieces()))
{
// In the cuckoo table, both moves Rc1c5 and Rc5c1 are stored in the same
// location. We select the legal one by reversing the move variable if necessary.
if (empty(s1))
move = make_move(s2, s1);
if (ply > i)
return true;
// For nodes before or at the root, check that the move is a
// repetition rather than a move to the current position.
// In the cuckoo table, both moves Rc1c5 and Rc5c1 are stored in
// the same location, so we have to select which square to check.
if (color_of(piece_on(empty(s1) ? s2 : s1)) != side_to_move())
continue;
// For repetitions before or at the root, require one more
StateInfo* next_stp = stp;
for (int k = i + 2; k <= end; k += 2)
{
next_stp = next_stp->previous->previous;
if (next_stp->key == stp->key)
return true;
}
if (stp->repetition)
return true;
}
}
}
@@ -1297,15 +1282,15 @@ bool Position::pos_is_ok() const {
assert(0 && "pos_is_ok: Index");
}
for (Color c = WHITE; c <= BLACK; ++c)
for (CastlingSide s = KING_SIDE; s <= QUEEN_SIDE; s = CastlingSide(s + 1))
for (Color c : { WHITE, BLACK })
for (CastlingRights cr : {c & KING_SIDE, c & QUEEN_SIDE})
{
if (!can_castle(c | s))
if (!can_castle(cr))
continue;
if ( piece_on(castlingRookSquare[c | s]) != make_piece(c, ROOK)
|| castlingRightsMask[castlingRookSquare[c | s]] != (c | s)
|| (castlingRightsMask[square<KING>(c)] & (c | s)) != (c | s))
if ( piece_on(castlingRookSquare[cr]) != make_piece(c, ROOK)
|| castlingRightsMask[castlingRookSquare[cr]] != cr
|| (castlingRightsMask[square<KING>(c)] & cr) != cr)
assert(0 && "pos_is_ok: Castling");
}

49
DroidFishApp/src/main/cpp/stockfish/position.h
View File

@@ -2,7 +2,7 @@
Stockfish, a UCI chess playing engine derived from Glaurung 2.1
Copyright (C) 2004-2008 Tord Romstad (Glaurung author)
Copyright (C) 2008-2015 Marco Costalba, Joona Kiiski, Tord Romstad
Copyright (C) 2015-2019 Marco Costalba, Joona Kiiski, Gary Linscott, Tord Romstad
Copyright (C) 2015-2020 Marco Costalba, Joona Kiiski, Gary Linscott, Tord Romstad
Stockfish is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
@@ -53,6 +53,7 @@ struct StateInfo {
Bitboard blockersForKing[COLOR_NB];
Bitboard pinners[COLOR_NB];
Bitboard checkSquares[PIECE_TYPE_NB];
int repetition;
};
/// A list to keep track of the position states along the setup moves (from the
@@ -95,17 +96,19 @@ public:
template<PieceType Pt> int count() const;
template<PieceType Pt> const Square* squares(Color c) const;
template<PieceType Pt> Square square(Color c) const;
bool is_on_semiopen_file(Color c, Square s) const;
// Castling
int can_castle(Color c) const;
int can_castle(CastlingRight cr) const;
bool castling_impeded(CastlingRight cr) const;
Square castling_rook_square(CastlingRight cr) const;
int castling_rights(Color c) const;
bool can_castle(CastlingRights cr) const;
bool castling_impeded(CastlingRights cr) const;
Square castling_rook_square(CastlingRights cr) const;
// Checking
Bitboard checkers() const;
Bitboard blockers_for_king(Color c) const;
Bitboard check_squares(PieceType pt) const;
bool is_discovery_check_on_king(Color c, Move m) const;
// Attacks to/from a given square
Bitboard attackers_to(Square s) const;
@@ -128,6 +131,7 @@ public:
// Piece specific
bool pawn_passed(Color c, Square s) const;
bool opposite_bishops() const;
int pawns_on_same_color_squares(Color c, Square s) const;
// Doing and undoing moves
void do_move(Move m, StateInfo& newSt);
@@ -260,25 +264,34 @@ inline Square Position::ep_square() const {
return st->epSquare;
}
inline int Position::can_castle(CastlingRight cr) const {
inline bool Position::is_on_semiopen_file(Color c, Square s) const {
return !(pieces(c, PAWN) & file_bb(s));
}
inline bool Position::can_castle(CastlingRights cr) const {
return st->castlingRights & cr;
}
inline int Position::can_castle(Color c) const {
return st->castlingRights & ((WHITE_OO | WHITE_OOO) << (2 * c));
inline int Position::castling_rights(Color c) const {
return st->castlingRights & (c == WHITE ? WHITE_CASTLING : BLACK_CASTLING);
}
inline bool Position::castling_impeded(CastlingRight cr) const {
inline bool Position::castling_impeded(CastlingRights cr) const {
assert(cr == WHITE_OO || cr == WHITE_OOO || cr == BLACK_OO || cr == BLACK_OOO);
return byTypeBB[ALL_PIECES] & castlingPath[cr];
}
inline Square Position::castling_rook_square(CastlingRight cr) const {
inline Square Position::castling_rook_square(CastlingRights cr) const {
assert(cr == WHITE_OO || cr == WHITE_OOO || cr == BLACK_OO || cr == BLACK_OOO);
return castlingRookSquare[cr];
}
template<PieceType Pt>
inline Bitboard Position::attacks_from(Square s) const {
assert(Pt != PAWN);
static_assert(Pt != PAWN, "Pawn attacks need color");
return Pt == BISHOP || Pt == ROOK ? attacks_bb<Pt>(s, byTypeBB[ALL_PIECES])
: Pt == QUEEN ? attacks_from<ROOK>(s) | attacks_from<BISHOP>(s)
: PseudoAttacks[Pt][s];
@@ -309,13 +322,21 @@ inline Bitboard Position::check_squares(PieceType pt) const {
return st->checkSquares[pt];
}
inline bool Position::is_discovery_check_on_king(Color c, Move m) const {
return st->blockersForKing[c] & from_sq(m);
}
inline bool Position::pawn_passed(Color c, Square s) const {
return !(pieces(~c, PAWN) & passed_pawn_mask(c, s));
return !(pieces(~c, PAWN) & passed_pawn_span(c, s));
}
inline bool Position::advanced_pawn_push(Move m) const {
return type_of(moved_piece(m)) == PAWN
&& relative_rank(sideToMove, from_sq(m)) > RANK_4;
&& relative_rank(sideToMove, to_sq(m)) > RANK_5;
}
inline int Position::pawns_on_same_color_squares(Color c, Square s) const {
return popcount(pieces(c, PAWN) & ((DarkSquares & s) ? DarkSquares : ~DarkSquares));
}
inline Key Position::key() const {
@@ -413,7 +434,7 @@ inline void Position::move_piece(Piece pc, Square from, Square to) {
// index[from] is not updated and becomes stale. This works as long as index[]
// is accessed just by known occupied squares.
Bitboard fromTo = SquareBB[from] ^ SquareBB[to];
Bitboard fromTo = from | to;
byTypeBB[ALL_PIECES] ^= fromTo;
byTypeBB[type_of(pc)] ^= fromTo;
byColorBB[color_of(pc)] ^= fromTo;

108
DroidFishApp/src/main/cpp/stockfish/psqt.cpp
View File

@@ -2,7 +2,7 @@
Stockfish, a UCI chess playing engine derived from Glaurung 2.1
Copyright (C) 2004-2008 Tord Romstad (Glaurung author)
Copyright (C) 2008-2015 Marco Costalba, Joona Kiiski, Tord Romstad
Copyright (C) 2015-2019 Marco Costalba, Joona Kiiski, Gary Linscott, Tord Romstad
Copyright (C) 2015-2020 Marco Costalba, Joona Kiiski, Gary Linscott, Tord Romstad
Stockfish is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
@@ -37,67 +37,70 @@ namespace PSQT {
// second half of the files.
constexpr Score Bonus[][RANK_NB][int(FILE_NB) / 2] = {
{ },
{ // Pawn
{ S( 0, 0), S( 0, 0), S( 0, 0), S( 0, 0) },
{ S(-11,-3), S( 7, -1), S( 7, 7), S(17, 2) },
{ S(-16,-2), S( -3, 2), S( 23, 6), S(23,-1) },
{ S(-14, 7), S( -7, -4), S( 20,-8), S(24, 2) },
{ S( -5,13), S( -2, 10), S( -1,-1), S(12,-8) },
{ S(-11,16), S(-12, 6), S( -2, 1), S( 4,16) },
{ S( -2, 1), S( 20,-12), S(-10, 6), S(-2,25) }
},
{ },
{ // Knight
{ S(-169,-105), S(-96,-74), S(-80,-46), S(-79,-18) },
{ S( -79, -70), S(-39,-56), S(-24,-15), S( -9, 6) },
{ S( -64, -38), S(-20,-33), S( 4, -5), S( 19, 27) },
{ S( -28, -36), S( 5, 0), S( 41, 13), S( 47, 34) },
{ S( -29, -41), S( 13,-20), S( 42, 4), S( 52, 35) },
{ S( -11, -51), S( 28,-38), S( 63,-17), S( 55, 19) },
{ S( -67, -64), S(-21,-45), S( 6,-37), S( 37, 16) },
{ S(-200, -98), S(-80,-89), S(-53,-53), S(-32,-16) }
{ S(-175, -96), S(-92,-65), S(-74,-49), S(-73,-21) },
{ S( -77, -67), S(-41,-54), S(-27,-18), S(-15, 8) },
{ S( -61, -40), S(-17,-27), S( 6, -8), S( 12, 29) },
{ S( -35, -35), S( 8, -2), S( 40, 13), S( 49, 28) },
{ S( -34, -45), S( 13,-16), S( 44, 9), S( 51, 39) },
{ S( -9, -51), S( 22,-44), S( 58,-16), S( 53, 17) },
{ S( -67, -69), S(-27,-50), S( 4,-51), S( 37, 12) },
{ S(-201,-100), S(-83,-88), S(-56,-56), S(-26,-17) }
},
{ // Bishop
{ S(-49,-58), S(- 7,-31), S(-10,-37), S(-34,-19) },
{ S(-24,-34), S( 9, -9), S( 15,-14), S( 1, 4) },
{ S( -9,-23), S( 22, 0), S( -3, -3), S( 12, 16) },
{ S( 4,-26), S( 9, -3), S( 18, -5), S( 40, 16) },
{ S( -8,-26), S( 27, -4), S( 13, -7), S( 30, 14) },
{ S(-17,-24), S( 14, -2), S( -6, 0), S( 6, 13) },
{ S(-19,-34), S(-13,-10), S( 7,-12), S(-11, 6) },
{ S(-47,-55), S( -7,-32), S(-17,-36), S(-29,-17) }
{ S(-53,-57), S( -5,-30), S( -8,-37), S(-23,-12) },
{ S(-15,-37), S( 8,-13), S( 19,-17), S( 4, 1) },
{ S( -7,-16), S( 21, -1), S( -5, -2), S( 17, 10) },
{ S( -5,-20), S( 11, -6), S( 25, 0), S( 39, 17) },
{ S(-12,-17), S( 29, -1), S( 22,-14), S( 31, 15) },
{ S(-16,-30), S( 6, 6), S( 1, 4), S( 11, 6) },
{ S(-17,-31), S(-14,-20), S( 5, -1), S( 0, 1) },
{ S(-48,-46), S( 1,-42), S(-14,-37), S(-23,-24) }
},
{ // Rook
{ S(-24, 0), S(-15, 3), S( -8, 0), S( 0, 3) },
{ S(-18,-7), S( -5,-5), S( -1,-5), S( 1,-1) },
{ S(-19, 6), S(-10,-7), S( 1, 3), S( 0, 3) },
{ S(-21, 0), S( -7, 4), S( -4,-2), S(-4, 1) },
{ S(-21,-7), S(-12, 5), S( -1,-5), S( 4,-7) },
{ S(-23, 3), S(-10, 2), S( 1,-1), S( 6, 3) },
{ S(-11,-1), S( 8, 7), S( 9,11), S(12,-1) },
{ S(-25, 6), S(-18, 4), S(-11, 6), S( 2, 2) }
{ S(-31, -9), S(-20,-13), S(-14,-10), S(-5, -9) },
{ S(-21,-12), S(-13, -9), S( -8, -1), S( 6, -2) },
{ S(-25, 6), S(-11, -8), S( -1, -2), S( 3, -6) },
{ S(-13, -6), S( -5, 1), S( -4, -9), S(-6, 7) },
{ S(-27, -5), S(-15, 8), S( -4, 7), S( 3, -6) },
{ S(-22, 6), S( -2, 1), S( 6, -7), S(12, 10) },
{ S( -2, 4), S( 12, 5), S( 16, 20), S(18, -5) },
{ S(-17, 18), S(-19, 0), S( -1, 19), S( 9, 13) }
},
{ // Queen
{ S( 3,-69), S(-5,-57), S(-5,-47), S( 4,-26) },
{ S( -3,-55), S( 5,-31), S( 8,-22), S(12, -4) },
{ S( -3,-39), S( 6,-18), S(13, -9), S( 7, 3) },
{ S( 4,-23), S( 5, -3), S( 9, 13), S( 8, 24) },
{ S( 0,-29), S(14, -6), S(12, 9), S( 5, 21) },
{ S( -4,-38), S(10,-18), S( 6,-12), S( 8, 1) },
{ S( -5,-50), S( 6,-27), S(10,-24), S( 8, -8) },
{ S( -2,-75), S(-2,-52), S( 1,-43), S(-2,-36) }
{ S( 3,-69), S(-5,-57), S(-5,-47), S( 4,-26) },
{ S(-3,-55), S( 5,-31), S( 8,-22), S(12, -4) },
{ S(-3,-39), S( 6,-18), S(13, -9), S( 7, 3) },
{ S( 4,-23), S( 5, -3), S( 9, 13), S( 8, 24) },
{ S( 0,-29), S(14, -6), S(12, 9), S( 5, 21) },
{ S(-4,-38), S(10,-18), S( 6,-12), S( 8, 1) },
{ S(-5,-50), S( 6,-27), S(10,-24), S( 8, -8) },
{ S(-2,-75), S(-2,-52), S( 1,-43), S(-2,-36) }
},
{ // King
{ S(272, 0), S(325, 41), S(273, 80), S(190, 93) },
{ S(277, 57), S(305, 98), S(241,138), S(183,131) },
{ S(198, 86), S(253,138), S(168,165), S(120,173) },
{ S(169,103), S(191,152), S(136,168), S(108,169) },
{ S(145, 98), S(176,166), S(112,197), S(69, 194) },
{ S(122, 87), S(159,164), S(85, 174), S(36, 189) },
{ S(87, 40), S(120, 99), S(64, 128), S(25, 141) },
{ S(64, 5), S(87, 60), S(49, 75), S(0, 75) }
{ S(271, 1), S(327, 45), S(271, 85), S(198, 76) },
{ S(278, 53), S(303,100), S(234,133), S(179,135) },
{ S(195, 88), S(258,130), S(169,169), S(120,175) },
{ S(164,103), S(190,156), S(138,172), S( 98,172) },
{ S(154, 96), S(179,166), S(105,199), S( 70,199) },
{ S(123, 92), S(145,172), S( 81,184), S( 31,191) },
{ S( 88, 47), S(120,121), S( 65,116), S( 33,131) },
{ S( 59, 11), S( 89, 59), S( 45, 73), S( -1, 78) }
}
};
constexpr Score PBonus[RANK_NB][FILE_NB] =
{ // Pawn (asymmetric distribution)
{ },
{ S( 3,-10), S( 3, -6), S( 10, 10), S( 19, 0), S( 16, 14), S( 19, 7), S( 7, -5), S( -5,-19) },
{ S( -9,-10), S(-15,-10), S( 11,-10), S( 15, 4), S( 32, 4), S( 22, 3), S( 5, -6), S(-22, -4) },
{ S( -8, 6), S(-23, -2), S( 6, -8), S( 20, -4), S( 40,-13), S( 17,-12), S( 4,-10), S(-12, -9) },
{ S( 13, 9), S( 0, 4), S(-13, 3), S( 1,-12), S( 11,-12), S( -2, -6), S(-13, 13), S( 5, 8) },
{ S( -5, 28), S(-12, 20), S( -7, 21), S( 22, 28), S( -8, 30), S( -5, 7), S(-15, 6), S(-18, 13) },
{ S( -7, 0), S( 7,-11), S( -3, 12), S(-13, 21), S( 5, 25), S(-16, 19), S( 10, 4), S( -8, 7) }
};
#undef S
Score psq[PIECE_NB][SQUARE_NB];
@@ -116,8 +119,9 @@ void init() {
for (Square s = SQ_A1; s <= SQ_H8; ++s)
{
File f = std::min(file_of(s), ~file_of(s));
psq[ pc][ s] = score + Bonus[pc][rank_of(s)][f];
File f = map_to_queenside(file_of(s));
psq[ pc][ s] = score + (type_of(pc) == PAWN ? PBonus[rank_of(s)][file_of(s)]
: Bonus[pc][rank_of(s)][f]);
psq[~pc][~s] = -psq[pc][s];
}
}

897
DroidFishApp/src/main/cpp/stockfish/search.cpp
View File

File diff suppressed because it is too large Load Diff

5
DroidFishApp/src/main/cpp/stockfish/search.h
View File

@@ -2,7 +2,7 @@
Stockfish, a UCI chess playing engine derived from Glaurung 2.1
Copyright (C) 2004-2008 Tord Romstad (Glaurung author)
Copyright (C) 2008-2015 Marco Costalba, Joona Kiiski, Tord Romstad
Copyright (C) 2015-2019 Marco Costalba, Joona Kiiski, Gary Linscott, Tord Romstad
Copyright (C) 2015-2020 Marco Costalba, Joona Kiiski, Gary Linscott, Tord Romstad
Stockfish is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
@@ -69,7 +69,8 @@ struct RootMove {
Value score = -VALUE_INFINITE;
Value previousScore = -VALUE_INFINITE;
int selDepth = 0;
int tbRank;
int tbRank = 0;
int bestMoveCount = 0;
Value tbScore;
std::vector<Move> pv;
};

73
DroidFishApp/src/main/cpp/stockfish/syzygy/tbprobe.cpp
View File

@@ -1,7 +1,7 @@
/*
Stockfish, a UCI chess playing engine derived from Glaurung 2.1
Copyright (c) 2013 Ronald de Man
Copyright (C) 2016-2018 Marco Costalba, Lucas Braesch
Copyright (C) 2016-2020 Marco Costalba, Lucas Braesch
Stockfish is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
@@ -27,12 +27,12 @@
#include <list>
#include <sstream>
#include <type_traits>
#include <mutex>
#include "../bitboard.h"
#include "../movegen.h"
#include "../position.h"
#include "../search.h"
#include "../thread_win32.h"
#include "../types.h"
#include "../uci.h"
@@ -45,7 +45,9 @@
#include <sys/stat.h>
#else
#define WIN32_LEAN_AND_MEAN
#define NOMINMAX
#ifndef NOMINMAX
# define NOMINMAX // Disable macros min() and max()
#endif
#include <windows.h>
#endif
@@ -214,39 +216,57 @@ public:
return *baseAddress = nullptr, nullptr;
fstat(fd, &statbuf);
if (statbuf.st_size % 64 != 16)
{
std::cerr << "Corrupt tablebase file " << fname << std::endl;
exit(EXIT_FAILURE);
}
*mapping = statbuf.st_size;
*baseAddress = mmap(nullptr, statbuf.st_size, PROT_READ, MAP_SHARED, fd, 0);
madvise(*baseAddress, statbuf.st_size, MADV_RANDOM);
::close(fd);
if (*baseAddress == MAP_FAILED) {
if (*baseAddress == MAP_FAILED)
{
std::cerr << "Could not mmap() " << fname << std::endl;
exit(1);
exit(EXIT_FAILURE);
}
#else
// Note FILE_FLAG_RANDOM_ACCESS is only a hint to Windows and as such may get ignored.
HANDLE fd = CreateFile(fname.c_str(), GENERIC_READ, FILE_SHARE_READ, nullptr,
OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, nullptr);
OPEN_EXISTING, FILE_FLAG_RANDOM_ACCESS, nullptr);
if (fd == INVALID_HANDLE_VALUE)
return *baseAddress = nullptr, nullptr;
DWORD size_high;
DWORD size_low = GetFileSize(fd, &size_high);
if (size_low % 64 != 16)
{
std::cerr << "Corrupt tablebase file " << fname << std::endl;
exit(EXIT_FAILURE);
}
HANDLE mmap = CreateFileMapping(fd, nullptr, PAGE_READONLY, size_high, size_low, nullptr);
CloseHandle(fd);
if (!mmap) {
if (!mmap)
{
std::cerr << "CreateFileMapping() failed" << std::endl;
exit(1);
exit(EXIT_FAILURE);
}
*mapping = (uint64_t)mmap;
*baseAddress = MapViewOfFile(mmap, FILE_MAP_READ, 0, 0, 0);
if (!*baseAddress) {
if (!*baseAddress)
{
std::cerr << "MapViewOfFile() failed, name = " << fname
<< ", error = " << GetLastError() << std::endl;
exit(1);
exit(EXIT_FAILURE);
}
#endif
uint8_t* data = (uint8_t*)*baseAddress;
@@ -254,7 +274,8 @@ public:
constexpr uint8_t Magics[][4] = { { 0xD7, 0x66, 0x0C, 0xA5 },
{ 0x71, 0xE8, 0x23, 0x5D } };
if (memcmp(data, Magics[type == WDL], 4)) {
if (memcmp(data, Magics[type == WDL], 4))
{
std::cerr << "Corrupted table in file " << fname << std::endl;
unmap(*baseAddress, *mapping);
return *baseAddress = nullptr, nullptr;
@@ -348,7 +369,7 @@ TBTable<WDL>::TBTable(const std::string& code) : TBTable() {
hasPawns = pos.pieces(PAWN);
hasUniquePieces = false;
for (Color c = WHITE; c <= BLACK; ++c)
for (Color c : { WHITE, BLACK })
for (PieceType pt = PAWN; pt < KING; ++pt)
if (popcount(pos.pieces(c, pt)) == 1)
hasUniquePieces = true;
@@ -415,7 +436,7 @@ class TBTables {
}
}
std::cerr << "TB hash table size too low!" << std::endl;
exit(1);
exit(EXIT_FAILURE);
}
public:
@@ -664,7 +685,7 @@ Ret do_probe_table(const Position& pos, T* entry, WDLScore wdl, ProbeState* resu
bool blackStronger = (pos.material_key() != entry->key);
int flipColor = (symmetricBlackToMove || blackStronger) * 8;
int flipSquares = (symmetricBlackToMove || blackStronger) * 070;
int flipSquares = (symmetricBlackToMove || blackStronger) * 56;
int stm = (symmetricBlackToMove || blackStronger) ^ pos.side_to_move();
// For pawns, TB files store 4 separate tables according if leading pawn is on
@@ -687,9 +708,7 @@ Ret do_probe_table(const Position& pos, T* entry, WDLScore wdl, ProbeState* resu
std::swap(squares[0], *std::max_element(squares, squares + leadPawnsCnt, pawns_comp));
tbFile = file_of(squares[0]);
if (tbFile > FILE_D)
tbFile = file_of(squares[0] ^ 7); // Horizontal flip: SQ_H1 -> SQ_A1
tbFile = map_to_queenside(file_of(squares[0]));
}
// DTZ tables are one-sided, i.e. they store positions only for white to
@@ -713,8 +732,8 @@ Ret do_probe_table(const Position& pos, T* entry, WDLScore wdl, ProbeState* resu
// Then we reorder the pieces to have the same sequence as the one stored
// in pieces[i]: the sequence that ensures the best compression.
for (int i = leadPawnsCnt; i < size; ++i)
for (int j = i; j < size; ++j)
for (int i = leadPawnsCnt; i < size - 1; ++i)
for (int j = i + 1; j < size; ++j)
if (d->pieces[i] == pieces[j])
{
std::swap(pieces[i], pieces[j]);
@@ -745,7 +764,7 @@ Ret do_probe_table(const Position& pos, T* entry, WDLScore wdl, ProbeState* resu
// piece is below RANK_5.
if (rank_of(squares[0]) > RANK_4)
for (int i = 0; i < size; ++i)
squares[i] ^= 070; // Vertical flip: SQ_A8 -> SQ_A1
squares[i] ^= SQ_A8; // Vertical flip: SQ_A8 -> SQ_A1
// Look for the first piece of the leading group not on the A1-D4 diagonal
// and ensure it is mapped below the diagonal.
@@ -1043,8 +1062,8 @@ void set(T& e, uint8_t* data) {
enum { Split = 1, HasPawns = 2 };
assert(e.hasPawns == !!(*data & HasPawns));
assert((e.key != e.key2) == !!(*data & Split));
assert(e.hasPawns == bool(*data & HasPawns));
assert((e.key != e.key2) == bool(*data & Split));
data++; // First byte stores flags
@@ -1107,14 +1126,14 @@ void set(T& e, uint8_t* data) {
template<TBType Type>
void* mapped(TBTable<Type>& e, const Position& pos) {
static Mutex mutex;
static std::mutex mutex;
// Use 'aquire' to avoid a thread reads 'ready' == true while another is
// still working, this could happen due to compiler reordering.
// Use 'acquire' to avoid a thread reading 'ready' == true while
// another is still working. (compiler reordering may cause this).
if (e.ready.load(std::memory_order_acquire))
return e.baseAddress; // Could be nullptr if file does not exsist
return e.baseAddress; // Could be nullptr if file does not exist
std::unique_lock<Mutex> lk(mutex);
std::unique_lock<std::mutex> lk(mutex);
if (e.ready.load(std::memory_order_relaxed)) // Recheck under lock
return e.baseAddress;

2
DroidFishApp/src/main/cpp/stockfish/syzygy/tbprobe.h
View File

@@ -1,7 +1,7 @@
/*
Stockfish, a UCI chess playing engine derived from Glaurung 2.1
Copyright (c) 2013 Ronald de Man
Copyright (C) 2016-2018 Marco Costalba, Lucas Braesch
Copyright (C) 2016-2020 Marco Costalba, Lucas Braesch
Stockfish is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by

49
DroidFishApp/src/main/cpp/stockfish/thread.cpp
View File

@@ -2,7 +2,7 @@
Stockfish, a UCI chess playing engine derived from Glaurung 2.1
Copyright (C) 2004-2008 Tord Romstad (Glaurung author)
Copyright (C) 2008-2015 Marco Costalba, Joona Kiiski, Tord Romstad
Copyright (C) 2015-2019 Marco Costalba, Joona Kiiski, Gary Linscott, Tord Romstad
Copyright (C) 2015-2020 Marco Costalba, Joona Kiiski, Gary Linscott, Tord Romstad
Stockfish is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
@@ -18,9 +18,9 @@
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <algorithm> // For std::count
#include <cassert>
#include <algorithm> // For std::count
#include "movegen.h"
#include "search.h"
#include "thread.h"
@@ -32,7 +32,7 @@ ThreadPool Threads; // Global object
/// Thread constructor launches the thread and waits until it goes to sleep
/// in idle_loop(). Note that 'searching' and 'exit' should be alredy set.
/// in idle_loop(). Note that 'searching' and 'exit' should be already set.
Thread::Thread(size_t n) : idx(n), stdThread(&Thread::idle_loop, this) {
@@ -52,6 +52,15 @@ Thread::~Thread() {
stdThread.join();
}
/// Thread::bestMoveCount(Move move) return best move counter for the given root move
int Thread::best_move_count(Move move) {
auto rm = std::find(rootMoves.begin() + pvIdx,
rootMoves.begin() + pvLast, move);
return rm != rootMoves.begin() + pvLast ? rm->bestMoveCount : 0;
}
/// Thread::clear() reset histories, usually before a new game
@@ -61,18 +70,22 @@ void Thread::clear() {
mainHistory.fill(0);
captureHistory.fill(0);
for (auto& to : continuationHistory)
for (auto& h : to)
for (bool inCheck : { false, true })
for (StatsType c : { NoCaptures, Captures })
for (auto& to : continuationHistory[inCheck][c])
for (auto& h : to)
h->fill(0);
continuationHistory[NO_PIECE][0]->fill(Search::CounterMovePruneThreshold - 1);
for (bool inCheck : { false, true })
for (StatsType c : { NoCaptures, Captures })
continuationHistory[inCheck][c][NO_PIECE][0]->fill(Search::CounterMovePruneThreshold - 1);
}
/// Thread::start_searching() wakes up the thread that will start the search
void Thread::start_searching() {
std::lock_guard<Mutex> lk(mutex);
std::lock_guard<std::mutex> lk(mutex);
searching = true;
cv.notify_one(); // Wake up the thread in idle_loop()
}
@@ -83,7 +96,7 @@ void Thread::start_searching() {
void Thread::wait_for_search_finished() {
std::unique_lock<Mutex> lk(mutex);
std::unique_lock<std::mutex> lk(mutex);
cv.wait(lk, [&]{ return !searching; });
}
@@ -103,7 +116,7 @@ void Thread::idle_loop() {
while (true)
{
std::unique_lock<Mutex> lk(mutex);
std::unique_lock<std::mutex> lk(mutex);
searching = false;
cv.notify_one(); // Wake up anyone waiting for search finished
cv.wait(lk, [&]{ return searching; });
@@ -118,7 +131,7 @@ void Thread::idle_loop() {
}
/// ThreadPool::set() creates/destroys threads to match the requested number.
/// Created and launched threads will go immediately to sleep in idle_loop.
/// Created and launched threads will immediately go to sleep in idle_loop.
/// Upon resizing, threads are recreated to allow for binding if necessary.
void ThreadPool::set(size_t requested) {
@@ -136,10 +149,13 @@ void ThreadPool::set(size_t requested) {
while (size() < requested)
push_back(new Thread(size()));
clear();
}
// Reallocate the hash with the new threadpool size
TT.resize(Options["Hash"]);
// Reallocate the hash with the new threadpool size
TT.resize(Options["Hash"]);
// Init thread number dependent search params.
Search::init();
}
}
/// ThreadPool::clear() sets threadPool data to initial values.
@@ -162,8 +178,9 @@ void ThreadPool::start_thinking(Position& pos, StateListPtr& states,
main()->wait_for_search_finished();
stopOnPonderhit = stop = false;
ponder = ponderMode;
main()->stopOnPonderhit = stop = false;
increaseDepth = true;
main()->ponder = ponderMode;
Search::Limits = limits;
Search::RootMoves rootMoves;
@@ -192,7 +209,7 @@ void ThreadPool::start_thinking(Position& pos, StateListPtr& states,
for (Thread* th : *this)
{
th->nodes = th->tbHits = th->nmpMinPly = 0;
th->rootDepth = th->completedDepth = DEPTH_ZERO;
th->rootDepth = th->completedDepth = 0;
th->rootMoves = rootMoves;
th->rootPos.set(pos.fen(), pos.is_chess960(), &setupStates->back(), th);
}

24
DroidFishApp/src/main/cpp/stockfish/thread.h
View File

@@ -2,7 +2,7 @@
Stockfish, a UCI chess playing engine derived from Glaurung 2.1
Copyright (C) 2004-2008 Tord Romstad (Glaurung author)
Copyright (C) 2008-2015 Marco Costalba, Joona Kiiski, Tord Romstad
Copyright (C) 2015-2019 Marco Costalba, Joona Kiiski, Gary Linscott, Tord Romstad
Copyright (C) 2015-2020 Marco Costalba, Joona Kiiski, Gary Linscott, Tord Romstad
Stockfish is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
@@ -32,7 +32,7 @@
#include "pawns.h"
#include "position.h"
#include "search.h"
#include "thread_win32.h"
#include "thread_win32_osx.h"
/// Thread class keeps together all the thread-related stuff. We use
@@ -42,11 +42,11 @@
class Thread {
Mutex mutex;
ConditionVariable cv;
std::mutex mutex;
std::condition_variable cv;
size_t idx;
bool exit = false, searching = true; // Set before starting std::thread
std::thread stdThread;
NativeThread stdThread;
public:
explicit Thread(size_t);
@@ -56,14 +56,15 @@ public:
void idle_loop();
void start_searching();
void wait_for_search_finished();
int best_move_count(Move move);
Pawns::Table pawnsTable;
Material::Table materialTable;
Endgames endgames;
size_t pvIdx, pvLast;
uint64_t ttHitAverage;
int selDepth, nmpMinPly;
Color nmpColor;
std::atomic<uint64_t> nodes, tbHits;
std::atomic<uint64_t> nodes, tbHits, bestMoveChanges;
Position rootPos;
Search::RootMoves rootMoves;
@@ -71,7 +72,7 @@ public:
CounterMoveHistory counterMoves;
ButterflyHistory mainHistory;
CapturePieceToHistory captureHistory;
ContinuationHistory continuationHistory;
ContinuationHistory continuationHistory[2][2];
Score contempt;
};
@@ -85,9 +86,12 @@ struct MainThread : public Thread {
void search() override;
void check_time();
double bestMoveChanges, previousTimeReduction;
double previousTimeReduction;
Value previousScore;
Value iterValue[4];
int callsCnt;
bool stopOnPonderhit;
std::atomic_bool ponder;
};
@@ -105,7 +109,7 @@ struct ThreadPool : public std::vector<Thread*> {
uint64_t nodes_searched() const { return accumulate(&Thread::nodes); }
uint64_t tb_hits() const { return accumulate(&Thread::tbHits); }
std::atomic_bool stop, ponder, stopOnPonderhit;
std::atomic_bool stop, increaseDepth;
private:
StateListPtr setupStates;

70
DroidFishApp/src/main/cpp/stockfish/thread_win32.h
View File

@@ -1,70 +0,0 @@
/*
Stockfish, a UCI chess playing engine derived from Glaurung 2.1
Copyright (C) 2004-2008 Tord Romstad (Glaurung author)
Copyright (C) 2008-2015 Marco Costalba, Joona Kiiski, Tord Romstad
Copyright (C) 2015-2019 Marco Costalba, Joona Kiiski, Gary Linscott, Tord Romstad
Stockfish is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
Stockfish is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef THREAD_WIN32_H_INCLUDED
#define THREAD_WIN32_H_INCLUDED
/// STL thread library used by mingw and gcc when cross compiling for Windows
/// relies on libwinpthread. Currently libwinpthread implements mutexes directly
/// on top of Windows semaphores. Semaphores, being kernel objects, require kernel
/// mode transition in order to lock or unlock, which is very slow compared to
/// interlocked operations (about 30% slower on bench test). To work around this
/// issue, we define our wrappers to the low level Win32 calls. We use critical
/// sections to support Windows XP and older versions. Unfortunately, cond_wait()
/// is racy between unlock() and WaitForSingleObject() but they have the same
/// speed performance as the SRW locks.
#include <condition_variable>
#include <mutex>
#if defined(_WIN32) && !defined(_MSC_VER)
#ifndef NOMINMAX
# define NOMINMAX // Disable macros min() and max()
#endif
#define WIN32_LEAN_AND_MEAN
#include <windows.h>
#undef WIN32_LEAN_AND_MEAN
#undef NOMINMAX
/// Mutex and ConditionVariable struct are wrappers of the low level locking
/// machinery and are modeled after the corresponding C++11 classes.
struct Mutex {
Mutex() { InitializeCriticalSection(&cs); }
~Mutex() { DeleteCriticalSection(&cs); }
void lock() { EnterCriticalSection(&cs); }
void unlock() { LeaveCriticalSection(&cs); }
private:
CRITICAL_SECTION cs;
};
typedef std::condition_variable_any ConditionVariable;
#else // Default case: use STL classes
typedef std::mutex Mutex;
typedef std::condition_variable ConditionVariable;
#endif
#endif // #ifndef THREAD_WIN32_H_INCLUDED

68
DroidFishApp/src/main/cpp/stockfish/thread_win32_osx.h Normal file
View File

@@ -0,0 +1,68 @@
/*
Stockfish, a UCI chess playing engine derived from Glaurung 2.1
Copyright (C) 2004-2008 Tord Romstad (Glaurung author)
Copyright (C) 2008-2015 Marco Costalba, Joona Kiiski, Tord Romstad
Copyright (C) 2015-2020 Marco Costalba, Joona Kiiski, Gary Linscott, Tord Romstad
Stockfish is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
Stockfish is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef THREAD_WIN32_OSX_H_INCLUDED
#define THREAD_WIN32_OSX_H_INCLUDED
#include <thread>
/// On OSX threads other than the main thread are created with a reduced stack
/// size of 512KB by default, this is too low for deep searches, which require
/// somewhat more than 1MB stack, so adjust it to TH_STACK_SIZE.
/// The implementation calls pthread_create() with the stack size parameter
/// equal to the linux 8MB default, on platforms that support it.
#if defined(__APPLE__) || defined(__MINGW32__) || defined(__MINGW64__)
#include <pthread.h>
static const size_t TH_STACK_SIZE = 8 * 1024 * 1024;
template <class T, class P = std::pair<T*, void(T::*)()>>
void* start_routine(void* ptr)
{
P* p = reinterpret_cast<P*>(ptr);
(p->first->*(p->second))(); // Call member function pointer
delete p;
return NULL;
}
class NativeThread {
pthread_t thread;
public:
template<class T, class P = std::pair<T*, void(T::*)()>>
explicit NativeThread(void(T::*fun)(), T* obj) {
pthread_attr_t attr_storage, *attr = &attr_storage;
pthread_attr_init(attr);
pthread_attr_setstacksize(attr, TH_STACK_SIZE);
pthread_create(&thread, attr, start_routine<T>, new P(obj, fun));
}
void join() { pthread_join(thread, NULL); }
};
#else // Default case: use STL classes
typedef std::thread NativeThread;
#endif
#endif // #ifndef THREAD_WIN32_OSX_H_INCLUDED

2
DroidFishApp/src/main/cpp/stockfish/timeman.cpp
View File

@@ -2,7 +2,7 @@
Stockfish, a UCI chess playing engine derived from Glaurung 2.1
Copyright (C) 2004-2008 Tord Romstad (Glaurung author)
Copyright (C) 2008-2015 Marco Costalba, Joona Kiiski, Tord Romstad
Copyright (C) 2015-2019 Marco Costalba, Joona Kiiski, Gary Linscott, Tord Romstad
Copyright (C) 2015-2020 Marco Costalba, Joona Kiiski, Gary Linscott, Tord Romstad
Stockfish is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by

2
DroidFishApp/src/main/cpp/stockfish/timeman.h
View File

@@ -2,7 +2,7 @@
Stockfish, a UCI chess playing engine derived from Glaurung 2.1
Copyright (C) 2004-2008 Tord Romstad (Glaurung author)
Copyright (C) 2008-2015 Marco Costalba, Joona Kiiski, Tord Romstad
Copyright (C) 2015-2019 Marco Costalba, Joona Kiiski, Gary Linscott, Tord Romstad
Copyright (C) 2015-2020 Marco Costalba, Joona Kiiski, Gary Linscott, Tord Romstad
Stockfish is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by

44
DroidFishApp/src/main/cpp/stockfish/tt.cpp
View File

@@ -2,7 +2,7 @@
Stockfish, a UCI chess playing engine derived from Glaurung 2.1
Copyright (C) 2004-2008 Tord Romstad (Glaurung author)
Copyright (C) 2008-2015 Marco Costalba, Joona Kiiski, Tord Romstad
Copyright (C) 2015-2019 Marco Costalba, Joona Kiiski, Gary Linscott, Tord Romstad
Copyright (C) 2015-2020 Marco Costalba, Joona Kiiski, Gary Linscott, Tord Romstad
Stockfish is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
@@ -24,15 +24,16 @@
#include "bitboard.h"
#include "misc.h"
#include "thread.h"
#include "tt.h"
#include "uci.h"
TranspositionTable TT; // Our global transposition table
/// TTEntry::save saves a TTEntry
void TTEntry::save(Key k, Value v, Bound b, Depth d, Move m, Value ev) {
/// TTEntry::save populates the TTEntry with a new node's data, possibly
/// overwriting an old position. Update is not atomic and can be racy.
assert(d / ONE_PLY * ONE_PLY == d);
void TTEntry::save(Key k, Value v, bool pv, Bound b, Depth d, Move m, Value ev) {
// Preserve any existing move for the same position
if (m || (k >> 48) != key16)
@@ -40,14 +41,16 @@ void TTEntry::save(Key k, Value v, Bound b, Depth d, Move m, Value ev) {
// Overwrite less valuable entries
if ( (k >> 48) != key16
|| d / ONE_PLY > depth8 - 4
|| d - DEPTH_OFFSET > depth8 - 4
|| b == BOUND_EXACT)
{
assert(d >= DEPTH_OFFSET);
key16 = (uint16_t)(k >> 48);
value16 = (int16_t)v;
eval16 = (int16_t)ev;
genBound8 = (uint8_t)(TT.generation8 | b);
depth8 = (int8_t)(d / ONE_PLY);
genBound8 = (uint8_t)(TT.generation8 | uint8_t(pv) << 2 | b);
depth8 = (uint8_t)(d - DEPTH_OFFSET);
}
}
@@ -58,6 +61,8 @@ void TTEntry::save(Key k, Value v, Bound b, Depth d, Move m, Value ev) {
void TranspositionTable::resize(size_t mbSize) {
Threads.main()->wait_for_search_finished();
clusterCount = mbSize * 1024 * 1024 / sizeof(Cluster);
free(mem);
@@ -82,7 +87,7 @@ void TranspositionTable::clear() {
std::vector<std::thread> threads;
for (size_t idx = 0; idx < Options["Threads"]; idx++)
for (size_t idx = 0; idx < Options["Threads"]; ++idx)
{
threads.emplace_back([this, idx]() {
@@ -119,7 +124,7 @@ TTEntry* TranspositionTable::probe(const Key key, bool& found) const {
for (int i = 0; i < ClusterSize; ++i)
if (!tte[i].key16 || tte[i].key16 == key16)
{
tte[i].genBound8 = uint8_t(generation8 | tte[i].bound()); // Refresh
tte[i].genBound8 = uint8_t(generation8 | (tte[i].genBound8 & 0x7)); // Refresh
return found = (bool)tte[i].key16, &tte[i];
}
@@ -128,11 +133,11 @@ TTEntry* TranspositionTable::probe(const Key key, bool& found) const {
TTEntry* replace = tte;
for (int i = 1; i < ClusterSize; ++i)
// Due to our packed storage format for generation and its cyclic
// nature we add 259 (256 is the modulus plus 3 to keep the lowest
// two bound bits from affecting the result) to calculate the entry
// nature we add 263 (256 is the modulus plus 7 to keep the unrelated
// lowest three bits from affecting the result) to calculate the entry
// age correctly even after generation8 overflows into the next cycle.
if ( replace->depth8 - ((259 + generation8 - replace->genBound8) & 0xFC) * 2
> tte[i].depth8 - ((259 + generation8 - tte[i].genBound8) & 0xFC) * 2)
if ( replace->depth8 - ((263 + generation8 - replace->genBound8) & 0xF8)
> tte[i].depth8 - ((263 + generation8 - tte[i].genBound8) & 0xF8))
replace = &tte[i];
return found = false, replace;
@@ -145,12 +150,9 @@ TTEntry* TranspositionTable::probe(const Key key, bool& found) const {
int TranspositionTable::hashfull() const {
int cnt = 0;
for (int i = 0; i < 1000 / ClusterSize; i++)
{
const TTEntry* tte = &table[i].entry[0];
for (int j = 0; j < ClusterSize; j++)
if ((tte[j].genBound8 & 0xFC) == generation8)
cnt++;
}
return cnt;
for (int i = 0; i < 1000 / ClusterSize; ++i)
for (int j = 0; j < ClusterSize; ++j)
cnt += (table[i].entry[j].genBound8 & 0xF8) == generation8;
return cnt * 1000 / (ClusterSize * (1000 / ClusterSize));
}

14
DroidFishApp/src/main/cpp/stockfish/tt.h
View File

@@ -2,7 +2,7 @@
Stockfish, a UCI chess playing engine derived from Glaurung 2.1
Copyright (C) 2004-2008 Tord Romstad (Glaurung author)
Copyright (C) 2008-2015 Marco Costalba, Joona Kiiski, Tord Romstad
Copyright (C) 2015-2019 Marco Costalba, Joona Kiiski, Gary Linscott, Tord Romstad
Copyright (C) 2015-2020 Marco Costalba, Joona Kiiski, Gary Linscott, Tord Romstad
Stockfish is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
@@ -30,7 +30,8 @@
/// move 16 bit
/// value 16 bit
/// eval value 16 bit
/// generation 6 bit
/// generation 5 bit
/// pv node 1 bit
/// bound type 2 bit
/// depth 8 bit
@@ -39,9 +40,10 @@ struct TTEntry {
Move move() const { return (Move )move16; }
Value value() const { return (Value)value16; }
Value eval() const { return (Value)eval16; }
Depth depth() const { return (Depth)(depth8 * int(ONE_PLY)); }
Depth depth() const { return (Depth)depth8 + DEPTH_OFFSET; }
bool is_pv() const { return (bool)(genBound8 & 0x4); }
Bound bound() const { return (Bound)(genBound8 & 0x3); }
void save(Key k, Value v, Bound b, Depth d, Move m, Value ev);
void save(Key k, Value v, bool pv, Bound b, Depth d, Move m, Value ev);
private:
friend class TranspositionTable;
@@ -51,7 +53,7 @@ private:
int16_t value16;
int16_t eval16;
uint8_t genBound8;
int8_t depth8;
uint8_t depth8;
};
@@ -76,7 +78,7 @@ class TranspositionTable {
public:
~TranspositionTable() { free(mem); }
void new_search() { generation8 += 4; } // Lower 2 bits are used by Bound
void new_search() { generation8 += 8; } // Lower 3 bits are used by PV flag and Bound
TTEntry* probe(const Key key, bool& found) const;
int hashfull() const;
void resize(size_t mbSize);

75
DroidFishApp/src/main/cpp/stockfish/types.h
View File

@@ -2,7 +2,7 @@
Stockfish, a UCI chess playing engine derived from Glaurung 2.1
Copyright (C) 2004-2008 Tord Romstad (Glaurung author)
Copyright (C) 2008-2015 Marco Costalba, Joona Kiiski, Tord Romstad
Copyright (C) 2015-2019 Marco Costalba, Joona Kiiski, Gary Linscott, Tord Romstad
Copyright (C) 2015-2020 Marco Costalba, Joona Kiiski, Gary Linscott, Tord Romstad
Stockfish is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
@@ -43,6 +43,7 @@
#include <climits>
#include <cstdint>
#include <cstdlib>
#include <algorithm>
#if defined(_MSC_VER)
// Disable some silly and noisy warning from MSVC compiler
@@ -101,7 +102,7 @@ typedef uint64_t Key;
typedef uint64_t Bitboard;
constexpr int MAX_MOVES = 256;
constexpr int MAX_PLY = 128;
constexpr int MAX_PLY = 246;
/// A move needs 16 bits to be stored
///
@@ -131,17 +132,19 @@ enum Color {
WHITE, BLACK, COLOR_NB = 2
};
enum CastlingSide {
KING_SIDE, QUEEN_SIDE, CASTLING_SIDE_NB = 2
};
enum CastlingRight {
enum CastlingRights {
NO_CASTLING,
WHITE_OO,
WHITE_OOO = WHITE_OO << 1,
BLACK_OO = WHITE_OO << 2,
BLACK_OOO = WHITE_OO << 3,
ANY_CASTLING = WHITE_OO | WHITE_OOO | BLACK_OO | BLACK_OOO,
KING_SIDE = WHITE_OO | BLACK_OO,
QUEEN_SIDE = WHITE_OOO | BLACK_OOO,
WHITE_CASTLING = WHITE_OO | WHITE_OOO,
BLACK_CASTLING = BLACK_OO | BLACK_OOO,
ANY_CASTLING = WHITE_CASTLING | BLACK_CASTLING,
CASTLING_RIGHT_NB = 16
};
@@ -176,11 +179,11 @@ enum Value : int {
VALUE_MATE_IN_MAX_PLY = VALUE_MATE - 2 * MAX_PLY,
VALUE_MATED_IN_MAX_PLY = -VALUE_MATE + 2 * MAX_PLY,
PawnValueMg = 136, PawnValueEg = 208,
KnightValueMg = 782, KnightValueEg = 865,
BishopValueMg = 830, BishopValueEg = 918,
RookValueMg = 1289, RookValueEg = 1378,
QueenValueMg = 2529, QueenValueEg = 2687,
PawnValueMg = 128, PawnValueEg = 213,
KnightValueMg = 781, KnightValueEg = 854,
BishopValueMg = 825, BishopValueEg = 915,
RookValueMg = 1276, RookValueEg = 1380,
QueenValueMg = 2538, QueenValueEg = 2682,
MidgameLimit = 15258, EndgameLimit = 3915
};
@@ -200,21 +203,18 @@ enum Piece {
extern Value PieceValue[PHASE_NB][PIECE_NB];
enum Depth : int {
typedef int Depth;
ONE_PLY = 1,
enum : int {
DEPTH_ZERO = 0 * ONE_PLY,
DEPTH_QS_CHECKS = 0 * ONE_PLY,
DEPTH_QS_NO_CHECKS = -1 * ONE_PLY,
DEPTH_QS_RECAPTURES = -5 * ONE_PLY,
DEPTH_QS_CHECKS = 0,
DEPTH_QS_NO_CHECKS = -1,
DEPTH_QS_RECAPTURES = -5,
DEPTH_NONE = -6 * ONE_PLY,
DEPTH_MAX = MAX_PLY * ONE_PLY
DEPTH_NONE = -6,
DEPTH_OFFSET = DEPTH_NONE,
};
static_assert(!(ONE_PLY & (ONE_PLY - 1)), "ONE_PLY is not a power of 2");
enum Square : int {
SQ_A1, SQ_B1, SQ_C1, SQ_D1, SQ_E1, SQ_F1, SQ_G1, SQ_H1,
SQ_A2, SQ_B2, SQ_C2, SQ_D2, SQ_E2, SQ_F2, SQ_G2, SQ_H2,
@@ -286,7 +286,6 @@ inline T& operator--(T& d) { return d = T(int(d) - 1); }
#define ENABLE_FULL_OPERATORS_ON(T) \
ENABLE_BASE_OPERATORS_ON(T) \
ENABLE_INCR_OPERATORS_ON(T) \
constexpr T operator*(int i, T d) { return T(i * int(d)); } \
constexpr T operator*(T d, int i) { return T(int(d) * i); } \
constexpr T operator/(T d, int i) { return T(int(d) / i); } \
@@ -295,12 +294,10 @@ inline T& operator*=(T& d, int i) { return d = T(int(d) * i); } \
inline T& operator/=(T& d, int i) { return d = T(int(d) / i); }
ENABLE_FULL_OPERATORS_ON(Value)
ENABLE_FULL_OPERATORS_ON(Depth)
ENABLE_FULL_OPERATORS_ON(Direction)
ENABLE_INCR_OPERATORS_ON(PieceType)
ENABLE_INCR_OPERATORS_ON(Piece)
ENABLE_INCR_OPERATORS_ON(Color)
ENABLE_INCR_OPERATORS_ON(Square)
ENABLE_INCR_OPERATORS_ON(File)
ENABLE_INCR_OPERATORS_ON(Rank)
@@ -344,6 +341,11 @@ inline Score operator*(Score s, int i) {
return result;
}
/// Multiplication of a Score by a boolean
inline Score operator*(Score s, bool b) {
return Score(int(s) * int(b));
}
constexpr Color operator~(Color c) {
return Color(c ^ BLACK); // Toggle color
}
@@ -352,16 +354,16 @@ constexpr Square operator~(Square s) {
return Square(s ^ SQ_A8); // Vertical flip SQ_A1 -> SQ_A8
}
constexpr File operator~(File f) {
return File(f ^ FILE_H); // Horizontal flip FILE_A -> FILE_H
}
constexpr Piece operator~(Piece pc) {
return Piece(pc ^ 8); // Swap color of piece B_KNIGHT -> W_KNIGHT
}
constexpr CastlingRight operator|(Color c, CastlingSide s) {
return CastlingRight(WHITE_OO << ((s == QUEEN_SIDE) + 2 * c));
inline File map_to_queenside(File f) {
return std::min(f, File(FILE_H - f)); // Map files ABCDEFGH to files ABCDDCBA
}
constexpr CastlingRights operator&(Color c, CastlingRights cr) {
return CastlingRights((c == WHITE ? WHITE_CASTLING : BLACK_CASTLING) & cr);
}
constexpr Value mate_in(int ply) {
@@ -413,11 +415,6 @@ constexpr Rank relative_rank(Color c, Square s) {
return relative_rank(c, rank_of(s));
}
inline bool opposite_colors(Square s1, Square s2) {
int s = int(s1) ^ int(s2);
return ((s >> 3) ^ s) & 1;
}
constexpr Direction pawn_push(Color c) {
return c == WHITE ? NORTH : SOUTH;
}
@@ -446,6 +443,10 @@ constexpr Move make_move(Square from, Square to) {
return Move((from << 6) + to);
}
constexpr Move reverse_move(Move m) {
return make_move(to_sq(m), from_sq(m));
}
template<MoveType T>
constexpr Move make(Square from, Square to, PieceType pt = KNIGHT) {
return Move(T + ((pt - KNIGHT) << 12) + (from << 6) + to);

48
DroidFishApp/src/main/cpp/stockfish/uci.cpp
View File

@@ -2,7 +2,7 @@
Stockfish, a UCI chess playing engine derived from Glaurung 2.1
Copyright (C) 2004-2008 Tord Romstad (Glaurung author)
Copyright (C) 2008-2015 Marco Costalba, Joona Kiiski, Tord Romstad
Copyright (C) 2015-2019 Marco Costalba, Joona Kiiski, Gary Linscott, Tord Romstad
Copyright (C) 2015-2020 Marco Costalba, Joona Kiiski, Gary Linscott, Tord Romstad
Stockfish is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
@@ -146,7 +146,7 @@ namespace {
uint64_t num, nodes = 0, cnt = 1;
vector<string> list = setup_bench(pos, args);
num = count_if(list.begin(), list.end(), [](string s) { return s.find("go ") == 0; });
num = count_if(list.begin(), list.end(), [](string s) { return s.find("go ") == 0 || s.find("eval") == 0; });
TimePoint elapsed = now();
@@ -155,16 +155,21 @@ namespace {
istringstream is(cmd);
is >> skipws >> token;
if (token == "go")
if (token == "go" || token == "eval")
{
cerr << "\nPosition: " << cnt++ << '/' << num << endl;
go(pos, is, states);
Threads.main()->wait_for_search_finished();
nodes += Threads.nodes_searched();
if (token == "go")
{
go(pos, is, states);
Threads.main()->wait_for_search_finished();
nodes += Threads.nodes_searched();
}
else
sync_cout << "\n" << Eval::trace(pos) << sync_endl;
}
else if (token == "setoption") setoption(is);
else if (token == "position") position(pos, is, states);
else if (token == "ucinewgame") Search::clear();
else if (token == "ucinewgame") { Search::clear(); elapsed = now(); } // Search::clear() may take some while
}
elapsed = now() - elapsed + 1; // Ensure positivity to avoid a 'divide by zero'
@@ -191,9 +196,8 @@ void UCI::loop(int argc, char* argv[]) {
Position pos;
string token, cmd;
StateListPtr states(new std::deque<StateInfo>(1));
auto uiThread = std::make_shared<Thread>(0);
pos.set(StartFEN, false, &states->back(), uiThread.get());
pos.set(StartFEN, false, &states->back(), Threads.main());
for (int i = 1; i < argc; ++i)
cmd += std::string(argv[i]) + " ";
@@ -207,18 +211,16 @@ void UCI::loop(int argc, char* argv[]) {
token.clear(); // Avoid a stale if getline() returns empty or blank line
is >> skipws >> token;
if ( token == "quit"
|| token == "stop")
Threads.stop = true;
// The GUI sends 'ponderhit' to tell us the user has played the expected move.
// So 'ponderhit' will be sent if we were told to ponder on the same move the
// user has played. We should continue searching but switch from pondering to
// normal search. In case Threads.stopOnPonderhit is set we are waiting for
// 'ponderhit' to stop the search, for instance if max search depth is reached.
if ( token == "quit"
|| token == "stop"
|| (token == "ponderhit" && Threads.stopOnPonderhit))
Threads.stop = true;
// normal search.
else if (token == "ponderhit")
Threads.ponder = false; // Switch to normal search
Threads.main()->ponder = false; // Switch to normal search
else if (token == "uci")
sync_cout << "id name " << engine_info(true)
@@ -231,11 +233,13 @@ void UCI::loop(int argc, char* argv[]) {
else if (token == "ucinewgame") Search::clear();
else if (token == "isready") sync_cout << "readyok" << sync_endl;
// Additional custom non-UCI commands, mainly for debugging
else if (token == "flip") pos.flip();
else if (token == "bench") bench(pos, is, states);
else if (token == "d") sync_cout << pos << sync_endl;
else if (token == "eval") sync_cout << Eval::trace(pos) << sync_endl;
// Additional custom non-UCI commands, mainly for debugging.
// Do not use these commands during a search!
else if (token == "flip") pos.flip();
else if (token == "bench") bench(pos, is, states);
else if (token == "d") sync_cout << pos << sync_endl;
else if (token == "eval") sync_cout << Eval::trace(pos) << sync_endl;
else if (token == "compiler") sync_cout << compiler_info() << sync_endl;
else
sync_cout << "Unknown command: " << cmd << sync_endl;

2
DroidFishApp/src/main/cpp/stockfish/uci.h
View File

@@ -2,7 +2,7 @@
Stockfish, a UCI chess playing engine derived from Glaurung 2.1
Copyright (C) 2004-2008 Tord Romstad (Glaurung author)
Copyright (C) 2008-2015 Marco Costalba, Joona Kiiski, Tord Romstad
Copyright (C) 2015-2019 Marco Costalba, Joona Kiiski, Gary Linscott, Tord Romstad
Copyright (C) 2015-2020 Marco Costalba, Joona Kiiski, Gary Linscott, Tord Romstad
Stockfish is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by

24
DroidFishApp/src/main/cpp/stockfish/ucioption.cpp
View File

@@ -2,7 +2,7 @@
Stockfish, a UCI chess playing engine derived from Glaurung 2.1
Copyright (C) 2004-2008 Tord Romstad (Glaurung author)
Copyright (C) 2008-2015 Marco Costalba, Joona Kiiski, Tord Romstad
Copyright (C) 2015-2019 Marco Costalba, Joona Kiiski, Gary Linscott, Tord Romstad
Copyright (C) 2015-2020 Marco Costalba, Joona Kiiski, Gary Linscott, Tord Romstad
Stockfish is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
@@ -21,6 +21,7 @@
#include <algorithm>
#include <cassert>
#include <ostream>
#include <sstream>
#include "misc.h"
#include "search.h"
@@ -73,6 +74,8 @@ void init(OptionsMap& o) {
o["nodestime"] << Option(0, 0, 10000);
o["UCI_Chess960"] << Option(false);
o["UCI_AnalyseMode"] << Option(false);
o["UCI_LimitStrength"] << Option(false);
o["UCI_Elo"] << Option(1350, 1350, 2850);
o["SyzygyPath"] << Option("<empty>", on_tb_path);
o["SyzygyProbeDepth"] << Option(1, 1, 100);
o["Syzygy50MoveRule"] << Option(true);
@@ -136,8 +139,8 @@ Option::operator std::string() const {
bool Option::operator==(const char* s) const {
assert(type == "combo");
return !CaseInsensitiveLess()(currentValue, s)
&& !CaseInsensitiveLess()(s, currentValue);
return !CaseInsensitiveLess()(currentValue, s)
&& !CaseInsensitiveLess()(s, currentValue);
}
@@ -153,8 +156,8 @@ void Option::operator<<(const Option& o) {
/// operator=() updates currentValue and triggers on_change() action. It's up to
/// the GUI to check for option's limits, but we could receive the new value from
/// the user by console window, so let's check the bounds anyway.
/// the GUI to check for option's limits, but we could receive the new value
/// from the user by console window, so let's check the bounds anyway.
Option& Option::operator=(const string& v) {
@@ -165,6 +168,17 @@ Option& Option::operator=(const string& v) {
|| (type == "spin" && (stof(v) < min || stof(v) > max)))
return *this;
if (type == "combo")
{
OptionsMap comboMap; // To have case insensitive compare
string token;
std::istringstream ss(defaultValue);
while (ss >> token)
comboMap[token] << Option();
if (!comboMap.count(v) || v == "var")
return *this;
}
if (type != "button")
currentValue = v;