};
// Constructors
- Position() {};
+ Position() {}
Position(const Position& pos);
Position(const std::string& fen);
Bitboard occupied_squares() const;
Bitboard pieces_of_color(Color c) const;
Bitboard pieces_of_type(PieceType pt) const;
- Bitboard pieces_of_color_and_type(Color c, PieceType pt) const;
Bitboard pawns() const;
Bitboard knights() const;
Bitboard bishops() const;
bool move_is_check(Move m) const;
bool move_is_check(Move m, Bitboard dcCandidates) const;
bool move_is_capture(Move m) const;
- bool move_is_deep_pawn_push(Move m) const;
- bool move_is_pawn_push_to_7th(Move m) const;
bool move_is_passed_pawn_push(Move m) const;
- bool move_was_passed_pawn_push(Move m) const;
bool move_attacks_square(Move m, Square s) const;
// Information about pawns
static bool pawn_is_isolated(Bitboard ourPawns, Square s);
static bool pawn_is_doubled(Bitboard ourPawns, Color c, Square s);
- // Open and half-open files
- static bool file_is_open(Bitboard pawns, File f);
- static bool file_is_half_open(Bitboard pawns, File f);
-
// Weak squares
bool square_is_weak(Square s, Color c) const;
int see(Square from, Square to) const;
int see(Move m) const;
int see(Square to) const;
+ int see_sign(Move m) const;
// Accessing hash keys
Key get_key() const;
void allow_ooo(Color c);
// Helper functions for doing and undoing moves
- void do_capture_move(PieceType capture, Color them, Square to);
+ void do_capture_move(Bitboard& key, PieceType capture, Color them, Square to, bool ep);
void do_castle_move(Move m);
- void do_promotion_move(Move m);
- void do_ep_move(Move m);
void undo_castle_move(Move m);
- void undo_promotion_move(Move m);
- void undo_ep_move(Move m);
void find_checkers();
template<PieceType Piece>
// Piece lists
Square pieceList[2][8][16]; // [color][pieceType][index]
- int index[64];
+ int index[64]; // [square]
// Other info
Square kingSquare[2];
return byTypeBB[pt];
}
-inline Bitboard Position::pieces_of_color_and_type(Color c, PieceType pt) const {
- return pieces_of_color(c) & pieces_of_type(pt);
-}
-
inline Bitboard Position::pawns() const {
return pieces_of_type(PAWN);
}
}
inline Bitboard Position::pawns(Color c) const {
- return pieces_of_color_and_type(c, PAWN);
+ return pieces_of_color(c) & pieces_of_type(PAWN);
}
inline Bitboard Position::knights(Color c) const {
- return pieces_of_color_and_type(c, KNIGHT);
+ return pieces_of_color(c) & pieces_of_type(KNIGHT);
}
inline Bitboard Position::bishops(Color c) const {
- return pieces_of_color_and_type(c, BISHOP);
+ return pieces_of_color(c) & pieces_of_type(BISHOP);
}
inline Bitboard Position::rooks(Color c) const {
- return pieces_of_color_and_type(c, ROOK);
+ return pieces_of_color(c) & pieces_of_type(ROOK);
}
inline Bitboard Position::queens(Color c) const {
- return pieces_of_color_and_type(c, QUEEN);
+ return pieces_of_color(c) & pieces_of_type(QUEEN);
}
inline Bitboard Position::kings(Color c) const {
- return pieces_of_color_and_type(c, KING);
+ return pieces_of_color(c) & pieces_of_type(KING);
}
inline Bitboard Position::rooks_and_queens(Color c) const {
- return rooks_and_queens() & pieces_of_color(c);
+ return pieces_of_color(c) & rooks_and_queens();
}
inline Bitboard Position::bishops_and_queens(Color c) const {
- return bishops_and_queens() & pieces_of_color(c);
+ return pieces_of_color(c) & bishops_and_queens();
}
inline int Position::piece_count(Color c, PieceType pt) const {
return ourPawns & squares_behind(c, s);
}
-inline bool Position::file_is_open(Bitboard pawns, File f) {
- return !(pawns & file_bb(f));
-}
-
-inline bool Position::file_is_half_open(Bitboard pawns, File f) {
- return !(pawns & file_bb(f));
-}
-
inline bool Position::square_is_weak(Square s, Color c) const {
return !(pawns(c) & outpost_mask(opposite_color(c), s));
}
inline Phase Position::game_phase() const {
// Values modified by Joona Kiiski
- static const Value MidgameLimit = Value(15713);
- static const Value EndgameLimit = Value(4428);
+ static const Value MidgameLimit = Value(15581);
+ static const Value EndgameLimit = Value(3998);
Value npm = non_pawn_material(WHITE) + non_pawn_material(BLACK);
return Phase(((npm - EndgameLimit) * 128) / (MidgameLimit - EndgameLimit));
}
-inline bool Position::move_is_deep_pawn_push(Move m) const {
-
- Color c = side_to_move();
- return piece_on(move_from(m)) == piece_of_color_and_type(c, PAWN)
- && relative_rank(c, move_to(m)) > RANK_4;
-}
-
-inline bool Position::move_is_pawn_push_to_7th(Move m) const {
-
- Color c = side_to_move();
- return piece_on(move_from(m)) == piece_of_color_and_type(c, PAWN)
- && relative_rank(c, move_to(m)) == RANK_7;
-}
-
inline bool Position::move_is_passed_pawn_push(Move m) const {
Color c = side_to_move();
&& pawn_is_passed(c, move_to(m));
}
-inline bool Position::move_was_passed_pawn_push(Move m) const {
-
- Color c = opposite_color(side_to_move());
- return piece_on(move_to(m)) == piece_of_color_and_type(c, PAWN)
- && pawn_is_passed(c, move_to(m));
-}
-
inline int Position::rule_50_counter() const {
return st->rule50;