template<PieceType> Bitboard attacks_from(Square s, Color c) const;
// Properties of moves
- bool pl_move_is_legal(Move m, Bitboard pinned) const;
- bool move_is_pl(const Move m) const;
bool move_gives_check(Move m, const CheckInfo& ci) const;
- bool move_is_capture(Move m) const;
- bool move_is_capture_or_promotion(Move m) const;
- bool move_is_passed_pawn_push(Move m) const;
bool move_attacks_square(Move m, Square s) const;
+ bool pl_move_is_legal(Move m, Bitboard pinned) const;
+ bool is_pseudo_legal(const Move m) const;
+ bool is_capture(Move m) const;
+ bool is_capture_or_promotion(Move m) const;
+ bool is_passed_pawn_push(Move m) const;
// Piece captured with previous moves
PieceType captured_piece_type() const;
void do_move(Move m, StateInfo& st);
void do_move(Move m, StateInfo& st, const CheckInfo& ci, bool moveIsCheck);
void undo_move(Move m);
- void do_null_move(StateInfo& st);
- void undo_null_move();
+ template<bool Do> void do_null_move(StateInfo& st);
// Static exchange evaluation
int see(Move m) const;
void set_nodes_searched(int64_t n);
// Position consistency check, for debugging
- bool is_ok(int* failedStep = NULL) const;
+ bool pos_is_ok(int* failedStep = NULL) const;
void flip_me();
// Global initialization
// Initialization helper functions (used while setting up a position)
void clear();
void put_piece(Piece p, Square s);
- void set_castle(int f, Square ksq, Square rsq);
- void set_castling_rights(char token);
+ void set_castle_right(Square ksq, Square rsq);
bool move_is_legal(const Move m) const;
- // Helper functions for doing and undoing moves
- void do_capture_move(Key& key, PieceType capture, Color them, Square to, bool ep);
- void do_castle_move(Move m);
- void undo_castle_move(Move m);
-
- template<bool FindPinned>
- Bitboard hidden_checkers() const;
+ // Helper template functions
+ template<bool Do> void do_castle_move(Move m);
+ 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]
// Static variables
static Score pieceSquareTable[16][64]; // [piece][square]
- static Key zobrist[2][8][64]; // [color][pieceType][square]
+ static Key zobrist[2][8][64]; // [color][pieceType][square]/[piece count]
static Key zobEp[64]; // [square]
static Key zobCastle[16]; // [castleRight]
static Key zobSideToMove;
}
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 attacks_from<ROOK>(s) | attacks_from<BISHOP>(s);
}
+inline Bitboard Position::attacks_from(Piece p, Square s) const {
+ return attacks_from(p, s, occupied_squares());
+}
+
+inline Bitboard Position::attackers_to(Square s) const {
+ return attackers_to(s, occupied_squares());
+}
+
inline Bitboard Position::checkers() const {
return st->checkersBB;
}
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));
}
return st->npMaterial[c];
}
-inline bool Position::move_is_passed_pawn_push(Move m) const {
+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 chess960;
}
-inline bool Position::move_is_capture_or_promotion(Move m) const {
+inline bool Position::is_capture_or_promotion(Move m) const {
- assert(move_is_ok(m));
- return move_is_special(m) ? !move_is_castle(m) : !square_is_empty(move_to(m));
+ assert(is_ok(m));
+ return is_special(m) ? !is_castle(m) : !square_is_empty(move_to(m));
}
-inline bool Position::move_is_capture(Move m) const {
+inline bool Position::is_capture(Move m) const {
// Note that castle is coded as "king captures the rook"
- assert(move_is_ok(m));
- return (!square_is_empty(move_to(m)) && !move_is_castle(m)) || move_is_ep(m);
+ assert(is_ok(m));
+ return (!square_is_empty(move_to(m)) && !is_castle(m)) || is_enpassant(m);
}
inline PieceType Position::captured_piece_type() const {