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/>.
21 #if !defined(PIECE_H_INCLUDED)
22 #define PIECE_H_INCLUDED
41 PAWN = 1, KNIGHT = 2, BISHOP = 3, ROOK = 4, QUEEN = 5, KING = 6
45 PIECE_NONE_DARK_SQ = 0, WP = 1, WN = 2, WB = 3, WR = 4, WQ = 5, WK = 6,
46 BP = 9, BN = 10, BB = 11, BR = 12, BQ = 13, BK = 14, PIECE_NONE = 16
49 ENABLE_OPERATORS_ON(PieceType)
50 ENABLE_OPERATORS_ON(Piece)
57 /// Important: If the material values are changed, one must also
58 /// adjust the piece square tables, and the method game_phase() in the
61 /// Values modified by Joona Kiiski
63 const Value PawnValueMidgame = Value(0x0C6);
64 const Value PawnValueEndgame = Value(0x102);
65 const Value KnightValueMidgame = Value(0x331);
66 const Value KnightValueEndgame = Value(0x34E);
67 const Value BishopValueMidgame = Value(0x344);
68 const Value BishopValueEndgame = Value(0x359);
69 const Value RookValueMidgame = Value(0x4F6);
70 const Value RookValueEndgame = Value(0x4FE);
71 const Value QueenValueMidgame = Value(0x9D9);
72 const Value QueenValueEndgame = Value(0x9FE);
79 inline PieceType type_of_piece(Piece p) {
80 return PieceType(int(p) & 7);
83 inline Color color_of_piece(Piece p) {
84 return Color(int(p) >> 3);
87 inline Piece piece_of_color_and_type(Color c, PieceType pt) {
88 return Piece((int(c) << 3) | int(pt));
91 inline SquareDelta pawn_push(Color c) {
92 return (c == WHITE ? DELTA_N : DELTA_S);
95 inline bool piece_type_is_ok(PieceType pt) {
96 return pt >= PAWN && pt <= KING;
99 inline bool piece_is_ok(Piece p) {
100 return piece_type_is_ok(type_of_piece(p)) && color_is_ok(color_of_piece(p));
103 inline char piece_type_to_char(PieceType pt) {
104 return std::string(" PNBRQK")[pt];
107 inline PieceType piece_type_from_char(char c) {
108 return PieceType(std::string(" PNBRQK").find(c));
111 #endif // !defined(PIECE_H_INCLUDED)