X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;ds=sidebyside;f=src%2Fpsqt.cpp;h=d3ebb20da1b5d100d55b7585722383214c1d77f1;hb=HEAD;hp=abd23547af3193df7235512cbda9707f484e887b;hpb=4c72c95359e28ea3e5a4357a7679de794ebd3e55;p=stockfish
diff --git a/src/psqt.cpp b/src/psqt.cpp
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-/*
- 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 .
-*/
-
-#include
-
-#include "types.h"
-#include "bitboard.h"
-
-namespace PSQT {
-
-#define S(mg, eg) make_score(mg, eg)
-
-// Bonus[PieceType][Square / 2] contains Piece-Square scores. For each piece
-// 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.
-constexpr Score Bonus[][RANK_NB][int(FILE_NB) / 2] = {
- { },
- { },
- { // Knight
- { 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(-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(-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) }
- },
- { // King
- { 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( -4, 6), S(-23, -2), S( 6, -8), S( 20, -4), S( 40,-13), S( 17,-12), S( 4,-10), S( -8, -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( -8, 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];
-
-// init() initializes piece-square tables: the white halves of the tables are
-// copied from Bonus[] adding the piece value, then the black halves of the
-// tables are initialized by flipping and changing the sign of the white scores.
-void init() {
-
- for (Piece pc = W_PAWN; pc <= W_KING; ++pc)
- {
- Score score = make_score(PieceValue[MG][pc], PieceValue[EG][pc]);
-
- for (Square s = SQ_A1; s <= SQ_H8; ++s)
- {
- File f = File(edge_distance(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][flip_rank(s)] = -psq[pc][s];
- }
- }
-}
-
-} // namespace PSQT