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) 2015-2018 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
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
///
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
};
VALUE_MATE_IN_MAX_PLY = VALUE_MATE - 2 * MAX_PLY,
VALUE_MATED_IN_MAX_PLY = -VALUE_MATE + 2 * MAX_PLY,
- PawnValueMg = 136, PawnValueEg = 208,
+ PawnValueMg = 128, PawnValueEg = 213,
KnightValueMg = 782, KnightValueEg = 865,
BishopValueMg = 830, BishopValueEg = 918,
RookValueMg = 1289, RookValueEg = 1378,
DEPTH_QS_NO_CHECKS = -1 * ONE_PLY,
DEPTH_QS_RECAPTURES = -5 * ONE_PLY,
- DEPTH_NONE = -6 * ONE_PLY,
- DEPTH_MAX = MAX_PLY * ONE_PLY
+ DEPTH_NONE = -6 * ONE_PLY,
+ DEPTH_OFFSET = DEPTH_NONE,
+ DEPTH_MAX = MAX_PLY * ONE_PLY
};
static_assert(!(ONE_PLY & (ONE_PLY - 1)), "ONE_PLY is not a power of 2");
#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); } \
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)
return result;
}
+/// Multiplication of a Score by an 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
}
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));
+constexpr CastlingRights operator&(Color c, CastlingRights cr) {
+ return CastlingRights((c == WHITE ? WHITE_CASTLING : BLACK_CASTLING) & cr);
}
constexpr Value mate_in(int ply) {
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;
}
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);