X-Git-Url: https://git.sesse.net/?p=stockfish;a=blobdiff_plain;f=src%2Fposition.h;h=a149bddb1bf59033134f52ca355e67cfdf349340;hp=e67dfbd49e165fb295af33d5691062cbdb0a5038;hb=9c7e2c8f9d3eba45c20529ad0624e6de10fc7b83;hpb=2aac860db3d04881103a3b0d09e864ac77b80697

diff --git a/src/position.h b/src/position.h
index e67dfbd4..a149bddb 100644
--- a/src/position.h
+++ b/src/position.h
@@ -60,6 +60,14 @@ struct StateInfo {
   StateInfo* previous;
 };
 
+struct ReducedStateInfo {
+  Key pawnKey, materialKey;
+  Value npMaterial[2];
+  int castleRights, rule50, pliesFromNull;
+  Score psqScore;
+  Square epSquare;
+};
+
 
 /// The position data structure. A position consists of the following data:
 ///
@@ -98,15 +106,15 @@ public:
 
   // Position representation
   Bitboard pieces() const;
-  Bitboard pieces(Color c) const;
   Bitboard pieces(PieceType pt) const;
-  Bitboard pieces(PieceType pt, Color c) const;
   Bitboard pieces(PieceType pt1, PieceType pt2) const;
-  Bitboard pieces(PieceType pt1, PieceType pt2, Color c) const;
+  Bitboard pieces(Color c) const;
+  Bitboard pieces(Color c, PieceType pt) const;
+  Bitboard pieces(Color c, PieceType pt1, PieceType pt2) const;
   Piece piece_on(Square s) const;
   Square king_square(Color c) const;
   Square ep_square() const;
-  bool square_empty(Square s) const;
+  bool is_empty(Square s) const;
   const Square* piece_list(Color c, PieceType pt) const;
   int piece_count(Color c, PieceType pt) const;
 
@@ -133,6 +141,7 @@ public:
   // Properties of moves
   bool move_gives_check(Move m, const CheckInfo& ci) const;
   bool move_attacks_square(Move m, Square s) const;
+  bool move_is_legal(const Move m) 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;
@@ -189,7 +198,6 @@ private:
   void clear();
   void put_piece(Piece p, Square s);
   void set_castle_right(Color c, Square rfrom);
-  bool move_is_legal(const Move m) const;
 
   // Helper template functions
   template<bool Do> void do_castle_move(Move m);
@@ -249,7 +257,7 @@ inline Piece Position::piece_moved(Move m) const {
   return board[from_sq(m)];
 }
 
-inline bool Position::square_empty(Square s) const {
+inline bool Position::is_empty(Square s) const {
   return board[s] == NO_PIECE;
 }
 
@@ -261,24 +269,24 @@ inline Bitboard Position::pieces() const {
   return byTypeBB[ALL_PIECES];
 }
 
-inline Bitboard Position::pieces(Color c) const {
-  return byColorBB[c];
-}
-
 inline Bitboard Position::pieces(PieceType pt) const {
   return byTypeBB[pt];
 }
 
-inline Bitboard Position::pieces(PieceType pt, Color c) const {
-  return byTypeBB[pt] & byColorBB[c];
-}
-
 inline Bitboard Position::pieces(PieceType pt1, PieceType pt2) const {
   return byTypeBB[pt1] | byTypeBB[pt2];
 }
 
-inline Bitboard Position::pieces(PieceType pt1, PieceType pt2, Color c) const {
-  return (byTypeBB[pt1] | byTypeBB[pt2]) & byColorBB[c];
+inline Bitboard Position::pieces(Color c) const {
+  return byColorBB[c];
+}
+
+inline Bitboard Position::pieces(Color c, PieceType pt) const {
+  return byColorBB[c] & byTypeBB[pt];
+}
+
+inline Bitboard Position::pieces(Color c, PieceType pt1, PieceType pt2) const {
+  return byColorBB[c] & (byTypeBB[pt1] | byTypeBB[pt2]);
 }
 
 inline int Position::piece_count(Color c, PieceType pt) const {
@@ -302,7 +310,7 @@ inline int Position::can_castle(CastleRight f) const {
 }
 
 inline int Position::can_castle(Color c) const {
-  return st->castleRights & ((WHITE_OO | WHITE_OOO) << c);
+  return st->castleRights & ((WHITE_OO | WHITE_OOO) << (2 * c));
 }
 
 inline bool Position::castle_impeded(Color c, CastlingSide s) const {
@@ -351,7 +359,7 @@ inline Bitboard Position::pinned_pieces() const {
 }
 
 inline bool Position::pawn_is_passed(Color c, Square s) const {
-  return !(pieces(PAWN, ~c) & passed_pawn_mask(c, s));
+  return !(pieces(~c, PAWN) & passed_pawn_mask(c, s));
 }
 
 inline Key Position::key() const {
@@ -406,7 +414,7 @@ inline bool Position::bishop_pair(Color c) const {
 }
 
 inline bool Position::pawn_on_7th(Color c) const {
-  return pieces(PAWN, c) & rank_bb(relative_rank(c, RANK_7));
+  return pieces(c, PAWN) & rank_bb(relative_rank(c, RANK_7));
 }
 
 inline bool Position::is_chess960() const {
@@ -416,14 +424,14 @@ inline bool Position::is_chess960() const {
 inline bool Position::is_capture_or_promotion(Move m) const {
 
   assert(is_ok(m));
-  return is_special(m) ? !is_castle(m) : !square_empty(to_sq(m));
+  return is_special(m) ? !is_castle(m) : !is_empty(to_sq(m));
 }
 
 inline bool Position::is_capture(Move m) const {
 
   // Note that castle is coded as "king captures the rook"
   assert(is_ok(m));
-  return (!square_empty(to_sq(m)) && !is_castle(m)) || is_enpassant(m);
+  return (!is_empty(to_sq(m)) && !is_castle(m)) || is_enpassant(m);
 }
 
 inline PieceType Position::captured_piece_type() const {