Broader condition for dangerous pawn moves

[stockfish] / src / position.h

diff --git a/src/position.h b/src/position.h
index 907463d47d4ea2db4a7bfdc91268d4108c884ef8..6defeb22bd9cedc8fbab20b6a50c28773974bc0e 100644 (file)
--- a/src/position.h
+++ b/src/position.h
@@ -123,7 +123,7 @@ public:
   bool capture(Move m) const;
   bool capture_or_promotion(Move m) const;
   bool gives_check(Move m, const CheckInfo& ci) const;
-  bool passed_pawn_push(Move m) const;
+  bool advanced_pawn_push(Move m) const;
   Piece moved_piece(Move m) const;
   PieceType captured_piece_type() const;
 
@@ -326,10 +326,8 @@ inline bool Position::pawn_passed(Color c, Square s) const {
   return !(pieces(~c, PAWN) & passed_pawn_mask(c, s));
 }
 
-inline bool Position::passed_pawn_push(Move m) const {
-
-  return   type_of(moved_piece(m)) == PAWN
-        && pawn_passed(sideToMove, to_sq(m));
+inline bool Position::advanced_pawn_push(Move m) const {
+  return pieces(PAWN) & TheirHalf[sideToMove] & from_sq(m);
 }
 
 inline Key Position::key() const {