X-Git-Url: https://git.sesse.net/?p=stockfish;a=blobdiff_plain;f=src%2Fposition.h;h=f3bb011274e04616809c4b82018047c19d17c4d8;hp=8e2ecf6019b812eb5872e2f7db27d36d65ea2528;hb=b7cb6180cf2a6fcab81dcd1b07f9dd4e650c8ea4;hpb=2c955f25de9d4c263b6e6d37fef06b378eec49a0

diff --git a/src/position.h b/src/position.h
index 8e2ecf60..f3bb0112 100644
--- a/src/position.h
+++ b/src/position.h
@@ -74,17 +74,16 @@ enum CastleRights {
 
 
 /// The UndoInfo struct stores information we need to restore a Position
-/// object to its previous state when we retract a move.  Whenever a move
+/// object to its previous state when we retract a move. Whenever a move
 /// is made on the board (by calling Position::do_move), an UndoInfo object
-/// must be passed as a parameter.  When the move is unmade (by calling
+/// must be passed as a parameter. When the move is unmade (by calling
 /// Position::undo_move), the same UndoInfo object must be passed again.
 
 struct UndoInfo {
-  int castleRights;
-  Square epSquare;
-  Bitboard checkersBB;
+  Bitboard pinners[2], pinned[2], dcCandidates[2], checkersBB;
   Key key, pawnKey, materialKey;
-  int rule50;
+  int castleRights, rule50;
+  Square epSquare;
   Move lastMove;
   Value mgValue, egValue;
   PieceType capture;
@@ -197,6 +196,7 @@ public:
 
   // Bitboards for pinned pieces and discovered check candidates
   Bitboard discovered_check_candidates(Color c) const;
+  Bitboard pinned_pieces(Color c, Bitboard& p) const;
   Bitboard pinned_pieces(Color c) const;
 
   // Checking pieces
@@ -215,13 +215,11 @@ public:
   template<PieceType>
   Bitboard piece_attacks_square(Square f, Square t) const; // Dispatch at compile-time
 
-  bool piece_attacks_square(Square f, Square t) const; // Dispatch at run-time
+  bool piece_attacks_square(Piece p, Square f, Square t) const; // Dispatch at run-time
 
   // Properties of moves
   bool pl_move_is_legal(Move m) const;
-  bool pl_move_is_legal(Move m, Bitboard pinned) 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;
@@ -242,10 +240,7 @@ public:
   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 do_move(Move m, UndoInfo &u, Bitboard dcCandidates);
   void undo_move(Move m, const UndoInfo &u);
   void do_null_move(UndoInfo &u);
   void undo_null_move(const UndoInfo &u);
@@ -312,7 +307,7 @@ private:
   void update_checkers(Bitboard* pCheckersBB, Square ksq, Square from, Square to, Bitboard dcCandidates);
 
   template<PieceType Piece, bool FindPinned>
-  Bitboard hidden_checks(Color c, Square ksq) const;
+  Bitboard hidden_checks(Color c, Square ksq, Bitboard& pinners) const;
 
   // Computing hash keys from scratch (for initialization and debugging)
   Key compute_key() const;
@@ -320,15 +315,16 @@ private:
   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
   Bitboard byColorBB[2], byTypeBB[8];
-  Bitboard checkersBB;
 
   // Board
   Piece board[64];
@@ -341,16 +337,27 @@ private:
   int index[64];
 
   // Other info
-  Color sideToMove;
-  int castleRights;
-  File initialKFile, initialKRFile, initialQRFile;
-  Square epSquare;
   Square kingSquare[2];
-  Move lastMove;
-  Key key, pawnKey, materialKey, history[MaxGameLength];
-  int rule50, gamePly;
-  Value mgValue, egValue;
+  Color sideToMove;
+  int gamePly;
+  Key history[MaxGameLength];
   Value npMaterial[2];
+  File initialKFile, initialKRFile, initialQRFile;
+
+  // Info backed up in do_move()
+  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;
+      };
+  };
 
   // Static variables
   static int castleRightsMask[64];
@@ -625,8 +632,10 @@ inline Key Position::get_material_key() const {
   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 {
@@ -634,10 +643,6 @@ 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;
 }