2 Stockfish, a UCI chess playing engine derived from Glaurung 2.1
3 Copyright (C) 2004-2008 Tord Romstad (Glaurung author)
4 Copyright (C) 2008-2010 Marco Costalba, Joona Kiiski, Tord Romstad
6 Stockfish is free software: you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation, either version 3 of the License, or
9 (at your option) any later version.
11 Stockfish is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program. If not, see <http://www.gnu.org/licenses/>.
31 // Tables indexed by Piece
33 const Value PieceValueMidgame[17] = {
35 PawnValueMidgame, KnightValueMidgame, BishopValueMidgame,
36 RookValueMidgame, QueenValueMidgame,
37 VALUE_ZERO, VALUE_ZERO, VALUE_ZERO,
38 PawnValueMidgame, KnightValueMidgame, BishopValueMidgame,
39 RookValueMidgame, QueenValueMidgame,
40 VALUE_ZERO, VALUE_ZERO, VALUE_ZERO
43 const Value PieceValueEndgame[17] = {
45 PawnValueEndgame, KnightValueEndgame, BishopValueEndgame,
46 RookValueEndgame, QueenValueEndgame,
47 VALUE_ZERO, VALUE_ZERO, VALUE_ZERO,
48 PawnValueEndgame, KnightValueEndgame, BishopValueEndgame,
49 RookValueEndgame, QueenValueEndgame,
50 VALUE_ZERO, VALUE_ZERO, VALUE_ZERO
53 const int SlidingArray[18] = {
54 0, 0, 0, 1, 2, 3, 0, 0, 0, 0, 0, 1, 2, 3, 0, 0, 0, 0
62 /// Translating piece types to/from English piece letters
64 static const string PieceChars(" pnbrqk PNBRQK");
66 char piece_type_to_char(PieceType pt, bool upcase) {
68 return PieceChars[pt + int(upcase) * 7];
71 PieceType piece_type_from_char(char c) {
73 size_t idx = PieceChars.find(c);
75 return idx != string::npos ? PieceType(idx % 7) : PIECE_TYPE_NONE;