/*
Stockfish, a UCI chess playing engine derived from Glaurung 2.1
- Copyright (C) 2004-2020 The Stockfish developers (see AUTHORS file)
+ Copyright (C) 2004-2021 The Stockfish developers (see AUTHORS file)
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 "bitboard.h"
#include "evaluate.h"
+#include "psqt.h"
#include "types.h"
#include "nnue/nnue_accumulator.h"
+namespace Stockfish {
/// StateInfo struct stores information needed to restore a Position object to
/// its previous state when we retract a move. Whenever a move is made on the
// FEN string input/output
Position& set(const std::string& fenStr, bool isChess960, StateInfo* si, Thread* th);
Position& set(const std::string& code, Color c, StateInfo* si);
- const std::string fen() const;
+ std::string fen() const;
// Position representation
Bitboard pieces(PieceType pt) const;
Bitboard blockers_for_king(Color c) const;
Bitboard check_squares(PieceType pt) const;
Bitboard pinners(Color c) const;
- bool is_discovery_check_on_king(Color c, Move m) const;
// Attacks to/from a given square
Bitboard attackers_to(Square s) const;
bool capture(Move m) const;
bool capture_or_promotion(Move m) const;
bool gives_check(Move m) const;
- bool advanced_pawn_push(Move m) const;
Piece moved_piece(Move m) const;
Piece captured_piece() const;
bool chess960;
};
-namespace PSQT {
- extern Score psq[PIECE_NB][SQUARE_NB];
-}
-
extern std::ostream& operator<<(std::ostream& os, const Position& pos);
inline Color Position::side_to_move() const {
return st->checkSquares[pt];
}
-inline bool Position::is_discovery_check_on_king(Color c, Move m) const {
- return st->blockersForKing[c] & from_sq(m);
-}
-
inline bool Position::pawn_passed(Color c, Square s) const {
return !(pieces(~c, PAWN) & passed_pawn_span(c, s));
}
-inline bool Position::advanced_pawn_push(Move m) const {
- return type_of(moved_piece(m)) == PAWN
- && relative_rank(sideToMove, to_sq(m)) > RANK_5;
-}
-
inline int Position::pawns_on_same_color_squares(Color c, Square s) const {
return popcount(pieces(c, PAWN) & ((DarkSquares & s) ? DarkSquares : ~DarkSquares));
}
inline Key Position::key() const {
- return st->key;
+ return st->rule50 < 14 ? st->key
+ : st->key ^ make_key((st->rule50 - 14) / 8);
}
inline Key Position::pawn_key() const {
inline bool Position::capture(Move m) const {
assert(is_ok(m));
// Castling is encoded as "king captures rook"
- return (!empty(to_sq(m)) && type_of(m) != CASTLING) || type_of(m) == ENPASSANT;
+ return (!empty(to_sq(m)) && type_of(m) != CASTLING) || type_of(m) == EN_PASSANT;
}
inline Piece Position::captured_piece() const {
return st;
}
+} // namespace Stockfish
+
#endif // #ifndef POSITION_H_INCLUDED