/*
Stockfish, a UCI chess playing engine derived from Glaurung 2.1
Copyright (C) 2004-2008 Tord Romstad (Glaurung author)
- Copyright (C) 2008-2010 Marco Costalba, Joona Kiiski, Tord Romstad
+ Copyright (C) 2008-2012 Marco Costalba, Joona Kiiski, 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
#include <cassert>
#include "bitboard.h"
-#include "move.h"
#include "types.h"
/// The checkInfo struct is initialized at c'tor time and keeps info used
/// to detect if a move gives check.
+class Position;
struct CheckInfo {
- explicit CheckInfo(const Position&);
+ explicit CheckInfo(const Position&);
- Bitboard dcCandidates;
- Bitboard pinned;
- Bitboard checkSq[8];
+ Bitboard dcCandidates;
+ Bitboard pinned;
+ Bitboard checkSq[8];
+ Square ksq;
};
/// object to its previous state when we retract a move. Whenever a move
/// is made on the board (by calling Position::do_move), an StateInfo object
/// must be passed as a parameter.
-class Position;
struct StateInfo {
Key pawnKey, materialKey;
class Position {
- // No defaul, copy c'tor or assignment allowed, default c'tor will not be
- // generated anyhow because of user-defined c'tors.
+ // No copy c'tor or assignment operator allowed
Position(const Position&);
Position& operator=(const Position&);
public:
- Position(const Position& pos, int threadID);
- Position(const std::string& fen, bool isChess960, int threadID);
+ Position() {}
+ Position(const Position& pos, int th) { copy(pos, th); }
+ Position(const std::string& fen, bool isChess960, int th);
// Text input/output
+ void copy(const Position& pos, int th);
void from_fen(const std::string& fen, bool isChess960);
const std::string to_fen() const;
void print(Move m = MOVE_NONE) const;
int see_sign(Move m) const;
// Accessing hash keys
- Key get_key() const;
- Key get_exclusion_key() const;
- Key get_pawn_key() const;
- Key get_material_key() const;
+ Key key() const;
+ Key exclusion_key() const;
+ Key pawn_key() const;
+ Key material_key() const;
// Incremental evaluation
Score value() const;
void set_castle_right(Square ksq, Square rsq);
bool move_is_legal(const Move m) const;
- // Helper functions for doing and undoing moves
+ // Helper template functions
template<bool Do> void do_castle_move(Move m);
-
- template<bool FindPinned>
- Bitboard hidden_checkers() const;
+ template<bool FindPinned> Bitboard hidden_checkers() const;
// Computing hash keys from scratch (for initialization and debugging)
Key compute_key() const;
// Bitboards
Bitboard byTypeBB[8]; // [pieceType]
Bitboard byColorBB[2]; // [color]
+ Bitboard occupied;
// Piece counts
int pieceCount[2][8]; // [color][pieceType]
}
inline bool Position::square_is_empty(Square s) const {
- return board[s] == PIECE_NONE;
+ return board[s] == NO_PIECE;
}
inline Color Position::side_to_move() const {
}
inline Bitboard Position::occupied_squares() const {
- return byTypeBB[0];
+ return occupied;
}
inline Bitboard Position::empty_squares() const {
- return ~byTypeBB[0];
+ return ~occupied;
}
inline Bitboard Position::pieces(Color c) const {
return st->checkersBB != 0;
}
+inline Bitboard Position::discovered_check_candidates() const {
+ return hidden_checkers<false>();
+}
+
+inline Bitboard Position::pinned_pieces() const {
+ return hidden_checkers<true>();
+}
+
inline bool Position::pawn_is_passed(Color c, Square s) const {
return !(pieces(PAWN, flip(c)) & passed_pawn_mask(c, s));
}
-inline Key Position::get_key() const {
+inline Key Position::key() const {
return st->key;
}
-inline Key Position::get_exclusion_key() const {
+inline Key Position::exclusion_key() const {
return st->key ^ zobExclusion;
}
-inline Key Position::get_pawn_key() const {
+inline Key Position::pawn_key() const {
return st->pawnKey;
}
-inline Key Position::get_material_key() const {
+inline Key Position::material_key() const {
return st->materialKey;
}
inline bool Position::is_passed_pawn_push(Move m) const {
- return board[move_from(m)] == make_piece(sideToMove, PAWN)
- && pawn_is_passed(sideToMove, move_to(m));
+ return board[from_sq(m)] == make_piece(sideToMove, PAWN)
+ && pawn_is_passed(sideToMove, to_sq(m));
}
inline int Position::startpos_ply_counter() const {
inline bool Position::is_capture_or_promotion(Move m) const {
assert(is_ok(m));
- return is_special(m) ? !is_castle(m) : !square_is_empty(move_to(m));
+ return is_special(m) ? !is_castle(m) : !square_is_empty(to_sq(m));
}
inline bool Position::is_capture(Move m) const {
// Note that castle is coded as "king captures the rook"
assert(is_ok(m));
- return (!square_is_empty(move_to(m)) && !is_castle(m)) || is_enpassant(m);
+ return (!square_is_empty(to_sq(m)) && !is_castle(m)) || is_enpassant(m);
}
inline PieceType Position::captured_piece_type() const {