Move lastMove;
Value mgValue, egValue;
PieceType capture;
+ UndoInfo* previous;
};
bool square_is_weak(Square s, Color c) const;
// Doing and undoing moves
- void backup(UndoInfo &u) const;
- void restore(const UndoInfo &u);
void do_move(Move m, UndoInfo &u);
- void undo_move(Move m, const UndoInfo &u);
+ void undo_move(Move m);
void do_null_move(UndoInfo &u);
- void undo_null_move(const UndoInfo &u);
+ void undo_null_move();
// Static exchange evaluation
int see(Square from, Square to) const;
// Helper functions for doing and undoing moves
void do_capture_move(Move m, PieceType capture, Color them, Square to);
void do_castle_move(Move m);
- void do_promotion_move(Move m, UndoInfo &u);
+ void do_promotion_move(Move m);
void do_ep_move(Move m);
void undo_castle_move(Move m);
- void undo_promotion_move(Move m, const UndoInfo &u);
+ void undo_promotion_move(Move m);
void undo_ep_move(Move m);
void find_checkers();
Key compute_material_key() const;
// Computing incremental evaluation scores and material counts
- Value mg_pst(Color c, PieceType pt, Square s) const;
- Value eg_pst(Color c, PieceType pt, Square s) const;
- Value compute_mg_value() const;
- Value compute_eg_value() const;
+ enum GamePhase {
+ MidGame,
+ EndGame
+ };
+ template<GamePhase> Value pst(Color c, PieceType pt, Square s) const;
+ template<GamePhase> Value compute_value() const;
Value compute_non_pawn_material(Color c) const;
// Bitboards
File initialKFile, initialKRFile, initialQRFile;
// Info backed up in do_move()
- mutable Bitboard pinners[2], pinned[2], dcCandidates[2];
- Bitboard checkersBB;
- Key key, pawnKey, materialKey;
- int castleRights, rule50;
- Square epSquare;
- Move lastMove;
- Value mgValue, egValue;
+ union {
+ UndoInfo undoInfoUnion;
+ struct { // Must have the same layout of UndoInfo
+ mutable Bitboard pinners[2], pinned[2], dcCandidates[2];
+ Bitboard checkersBB;
+ Key key, pawnKey, materialKey;
+ int castleRights, rule50;
+ Square epSquare;
+ Move lastMove;
+ Value mgValue, egValue;
+ PieceType capture;
+ UndoInfo* previous;
+ };
+ };
// Static variables
static int castleRightsMask[64];
return materialKey;
}
-inline Value Position::mg_pst(Color c, PieceType pt, Square s) const {
- return MgPieceSquareTable[piece_of_color_and_type(c, pt)][s];
+template<Position::GamePhase Phase>
+inline Value Position::pst(Color c, PieceType pt, Square s) const {
+ return (Phase == MidGame ? MgPieceSquareTable[piece_of_color_and_type(c, pt)][s]
+ : EgPieceSquareTable[piece_of_color_and_type(c, pt)][s]);
}
inline Value Position::mg_pst_delta(Move m) const {
-MgPieceSquareTable[piece_on(move_from(m))][move_from(m)];
}
-inline Value Position::eg_pst(Color c, PieceType pt, Square s) const {
- return EgPieceSquareTable[piece_of_color_and_type(c, pt)][s];
-}
-
inline Value Position::mg_value() const {
return mgValue;
}