#if !defined(POSITION_H_INCLUDED)
#define POSITION_H_INCLUDED
+#include <cassert>
+
#include "bitboard.h"
#include "move.h"
#include "types.h"
explicit CheckInfo(const Position&);
Bitboard dcCandidates;
+ Bitboard pinned;
Bitboard checkSq[8];
- Square ksq;
};
/// Castle rights, encoded as bit fields
class Position {
- friend class MaterialInfo;
- friend class EndgameFunctions;
-
Position(); // No default or copy c'tor allowed
Position(const Position& pos);
void print(Move m = MOVE_NONE) const;
// Copying
- void flipped_copy(const Position& pos);
+ void flip();
// The piece on a given square
Piece piece_on(Square s) const;
// Checking pieces and under check information
Bitboard checkers() const;
- bool is_check() const;
+ bool in_check() const;
// Piece lists
Square piece_list(Color c, PieceType pt, int index) const;
// Information about attacks to or from a given square
Bitboard attackers_to(Square s) const;
+ Bitboard attackers_to(Square s, Bitboard occ) const;
Bitboard attacks_from(Piece p, Square s) const;
static Bitboard attacks_from(Piece p, Square s, Bitboard occ);
template<PieceType> Bitboard attacks_from(Square s) const;
// Properties of moves
bool pl_move_is_legal(Move m, Bitboard pinned) const;
- bool pl_move_is_evasion(Move m, Bitboard pinned) const;
- bool move_is_check(Move m) const;
- bool move_is_check(Move m, const CheckInfo& ci) 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;
void undo_null_move();
// Static exchange evaluation
- int see(Square from, Square to) const;
int see(Move m) const;
int see_sign(Move m) const;
+ static int see_value(PieceType pt);
// Accessing hash keys
Key get_key() const;
// Game termination checks
bool is_mate() const;
- bool is_draw() const;
-
- // Check if side to move could be mated in one
- bool has_mate_threat();
+ template<bool SkipRepetition> bool is_draw() const;
// Number of plies from starting position
int startpos_ply_counter() const;
// Position consistency check, for debugging
bool is_ok(int* failedStep = NULL) const;
- // Static member functions
- static void init_zobrist();
- static void init_piece_square_tables();
+ // Global initialization
+ static void init();
private:
void clear();
void detach();
void put_piece(Piece p, Square s);
- void do_allow_oo(Color c);
- void do_allow_ooo(Color c);
+ void set_castle_kingside(Color c);
+ void set_castle_queenside(Color c);
bool set_castling_rights(char token);
+ bool move_is_pl_slow(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);
return pieceList[c][KING][0];
}
-inline bool Position::can_castle_kingside(Color side) const {
- return st->castleRights & (1+int(side));
+inline bool Position::can_castle_kingside(Color c) const {
+ return st->castleRights & (WHITE_OO << c);
+}
+
+inline bool Position::can_castle_queenside(Color c) const {
+ return st->castleRights & (WHITE_OOO << c);
}
-inline bool Position::can_castle_queenside(Color side) const {
- return st->castleRights & (4+4*int(side));
+inline bool Position::can_castle(Color c) const {
+ return st->castleRights & ((WHITE_OO | WHITE_OOO) << c);
}
-inline bool Position::can_castle(Color side) const {
- return can_castle_kingside(side) || can_castle_queenside(side);
+inline void Position::set_castle_kingside(Color c) {
+ st->castleRights |= (WHITE_OO << c);
+}
+
+inline void Position::set_castle_queenside(Color c) {
+ st->castleRights |= (WHITE_OOO << c);
}
inline Square Position::initial_kr_square(Color c) const {
return st->checkersBB;
}
-inline bool Position::is_check() const {
+inline bool Position::in_check() const {
return st->checkersBB != EmptyBoardBB;
}
return !(pieces(PAWN, opposite_color(c)) & attack_span_mask(c, s));
}
+inline int Position::see_value(PieceType pt) {
+ return seeValues[pt];
+}
+
inline Key Position::get_key() const {
return st->key;
}
return chess960;
}
-inline bool Position::move_is_capture(Move m) const {
+inline bool Position::move_is_capture_or_promotion(Move m) const {
- // Move must not be MOVE_NONE !
- return (m & (3 << 15)) ? !move_is_castle(m) : !square_is_empty(move_to(m));
+ assert(m != MOVE_NONE && m != MOVE_NULL);
+ return move_is_special(m) ? !move_is_castle(m) : !square_is_empty(move_to(m));
}
-inline bool Position::move_is_capture_or_promotion(Move m) const {
+inline bool Position::move_is_capture(Move m) const {
+
+ assert(m != MOVE_NONE && m != MOVE_NULL);
- // Move must not be MOVE_NONE !
- return (m & (0x1F << 12)) ? !move_is_castle(m) : !square_is_empty(move_to(m));
+ // Note that castle is coded as "king captures the rook"
+ return (!square_is_empty(move_to(m)) && !move_is_castle(m)) || move_is_ep(m);
}
inline PieceType Position::captured_piece_type() const {
return threadID;
}
-inline void Position::do_allow_oo(Color c) {
- st->castleRights |= (1 + int(c));
-}
-
-inline void Position::do_allow_ooo(Color c) {
- st->castleRights |= (4 + 4*int(c));
-}
-
#endif // !defined(POSITION_H_INCLUDED)