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) 2015-2017 Marco Costalba, Joona Kiiski, Gary Linscott, 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
// type on a given square a (middlegame, endgame) score pair is assigned. Table
// is defined for files A..D and white side: it is symmetric for black side and
// second half of the files.
-const Score Bonus[][RANK_NB][int(FILE_NB) / 2] = {
+constexpr Score Bonus[][RANK_NB][int(FILE_NB) / 2] = {
+ { },
{ },
- { // Pawn
- { S( 0, 0), S( 0, 0), S( 0, 0), S( 0, 0) },
- { S(-11, 7), S( 6,-4), S( 7, 8), S( 3,-2) },
- { S(-18,-4), S( -2,-5), S( 19, 5), S(24, 4) },
- { S(-17, 3), S( -9, 3), S( 20,-8), S(35,-3) },
- { S( -6, 8), S( 5, 9), S( 3, 7), S(21,-6) },
- { S( -6, 8), S( -8,-5), S( -6, 2), S(-2, 4) },
- { S( -4, 3), S( 20,-9), S( -8, 1), S(-4,18) }
- },
{ // Knight
- { S(-144, -98), S(-96,-82), S(-80,-46), S(-73,-14) },
- { S( -83, -69), S(-43,-54), S(-21,-17), S(-10, 9) },
- { S( -71, -50), S(-22,-39), S( 0, -7), S( 9, 28) },
- { S( -25, -41), S( 18,-25), S( 43, 6), S( 47, 38) },
- { S( -26, -46), S( 16,-25), S( 38, 3), S( 50, 40) },
- { S( -11, -54), S( 37,-38), S( 56, -7), S( 65, 27) },
- { S( -62, -65), S(-17,-50), S( 5,-24), S( 14, 13) },
- { S(-194,-109), S(-66,-89), S(-42,-50), S(-29,-13) }
+ { 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) }
},
{ // Bishop
- { S(-44,-58), S(-13,-31), S(-25,-37), S(-34,-19) },
- { S(-20,-34), S( 20, -9), S( 12,-14), S( 1, 4) },
- { S( -9,-23), S( 27, 0), S( 21, -3), S( 11, 16) },
- { S(-11,-26), S( 28, -3), S( 21, -5), S( 10, 16) },
- { S(-11,-26), S( 24, -4), S( 16, -7), S( 9, 14) },
- { S(-17,-24), S( 16, -2), S( 12, 0), S( 2, 13) },
- { S(-23,-34), S( 17,-10), S( 6,-12), S( -2, 6) },
- { S(-35,-55), S(-11,-32), S(-19,-36), S(-29,-17) }
+ { S(-44,-63), S( -4,-30), S(-11,-35), S(-28, -8) },
+ { S(-18,-38), S( 7,-13), S( 14,-14), S( 3, 0) },
+ { S( -8,-18), S( 24, 0), S( -3, -7), S( 15, 13) },
+ { S( 1,-26), S( 8, -3), S( 26, 1), S( 37, 16) },
+ { S( -7,-24), S( 30, -6), S( 23,-10), S( 28, 17) },
+ { S(-17,-26), S( 4, 2), S( -1, 1), S( 8, 16) },
+ { S(-21,-34), S(-19,-18), S( 10, -7), S( -6, 9) },
+ { S(-48,-51), S( -3,-40), S(-12,-39), S(-25,-20) }
},
{ // Rook
- { S(-25, 0), S(-16, 0), S(-16, 0), S(-9, 0) },
- { S(-21, 0), S( -8, 0), S( -3, 0), S( 0, 0) },
- { S(-21, 0), S( -9, 0), S( -4, 0), S( 2, 0) },
- { S(-22, 0), S( -6, 0), S( -1, 0), S( 2, 0) },
- { S(-22, 0), S( -7, 0), S( 0, 0), S( 1, 0) },
- { S(-21, 0), S( -7, 0), S( 0, 0), S( 2, 0) },
- { S(-12, 0), S( 4, 0), S( 8, 0), S(12, 0) },
- { S(-23, 0), S(-15, 0), S(-11, 0), S(-5, 0) }
+ { S(-24, -2), S(-13,-6), S(-7, -3), S( 2,-2) },
+ { S(-18,-10), S(-10,-7), S(-5, 1), S( 9, 0) },
+ { S(-21, 10), S( -7,-4), S( 3, 2), S(-1,-2) },
+ { S(-13, -5), S( -5, 2), S(-4, -8), S(-6, 8) },
+ { S(-24, -8), S(-12, 5), S(-1, 4), S( 6,-9) },
+ { S(-24, 3), S( -4,-2), S( 4,-10), S(10, 7) },
+ { S( -8, 1), S( 6, 2), S(10, 17), S(12,-8) },
+ { S(-22, 12), S(-24,-6), S(-6, 13), S( 4, 7) }
},
{ // Queen
- { S( 0,-71), S(-4,-56), S(-3,-42), S(-1,-29) },
- { S(-4,-56), S( 6,-30), S( 9,-21), S( 8, -5) },
- { S(-2,-39), S( 6,-17), S( 9, -8), S( 9, 5) },
- { S(-1,-29), S( 8, -5), S(10, 9), S( 7, 19) },
- { S(-3,-27), S( 9, -5), S( 8, 10), S( 7, 21) },
- { S(-2,-40), S( 6,-16), S( 8,-10), S(10, 3) },
- { S(-2,-55), S( 7,-30), S( 7,-21), S( 6, -6) },
- { S(-1,-74), S(-4,-55), S(-1,-43), S( 0,-30) }
+ { 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(267, 0), S(320, 48), S(270, 75), S(195, 84) },
- { S(264, 43), S(304, 92), S(238,143), S(180,132) },
- { S(200, 83), S(245,138), S(176,167), S(110,165) },
- { S(177,106), S(185,169), S(148,169), S(110,179) },
- { S(149,108), S(177,163), S(115,200), S( 66,203) },
- { S(118, 95), S(159,155), S( 84,176), S( 41,174) },
- { S( 86, 50), S(128, 99), S( 63,122), S( 18,139) },
- { S( 63, 9), S( 89, 55), S( 47, 80), S( 0, 90) }
+ { 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) }
}
};
+constexpr Score PBonus[RANK_NB][FILE_NB] =
+ { // Pawn (asymmetric distribution)
+ { },
+ { S( 0,-10), S( -5,-3), S( 10, 7), S( 13,-1), S( 21, 7), S( 17, 6), S( 6, 1), S( -3,-20) },
+ { S(-11, -6), S(-10,-6), S( 15,-1), S( 22,-1), S( 26, -1), S( 28, 2), S( 4,-2), S(-24, -5) },
+ { S( -9, 4), S(-18,-5), S( 8,-4), S( 22,-5), S( 33, -6), S( 25,-13), S( -4,-3), S(-16, -7) },
+ { S( 6, 18), S( -3, 2), S(-10, 2), S( 1,-9), S( 12,-13), S( 6, -8), S(-12,11), S( 1, 9) },
+ { S( -6, 25), S( -8,17), S( 5,19), S( 11,29), S(-14, 29), S( 0, 8), S(-12, 4), S(-14, 12) },
+ { S(-10, -1), S( 6,-6), S( -5,18), S(-11,22), S( -2, 22), S(-14, 17), S( 12, 2), S( -1, 9) }
+ };
+
#undef S
Score psq[PIECE_NB][SQUARE_NB];
PieceValue[MG][~pc] = PieceValue[MG][pc];
PieceValue[EG][~pc] = PieceValue[EG][pc];
- Score v = make_score(PieceValue[MG][pc], PieceValue[EG][pc]);
+ Score score = make_score(PieceValue[MG][pc], PieceValue[EG][pc]);
for (Square s = SQ_A1; s <= SQ_H8; ++s)
{
- File f = std::min(file_of(s), FILE_H - file_of(s));
- psq[ pc][ s] = v + Bonus[pc][rank_of(s)][f];
+ File f = std::min(file_of(s), ~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];
}
}
projects / stockfish / blobdiff