X-Git-Url: https://git.sesse.net/?p=stockfish;a=blobdiff_plain;f=src%2Fposition.h;h=4e15bb136f9997d98e9e070243d142b9836efca2;hp=6defeb22bd9cedc8fbab20b6a50c28773974bc0e;hb=b71cedb2b009adfd19e9f25c298ac6bd0304dcfc;hpb=69a14554eebc1467db7234e354bfd864fa46b1b9

diff --git a/src/position.h b/src/position.h
index 6defeb22..4e15bb13 100644
--- a/src/position.h
+++ b/src/position.h
@@ -327,7 +327,8 @@ inline bool Position::pawn_passed(Color c, Square s) const {
 }
 
 inline bool Position::advanced_pawn_push(Move m) const {
-  return pieces(PAWN) & TheirHalf[sideToMove] & from_sq(m);
+  return   type_of(moved_piece(m)) == PAWN
+        && relative_rank(sideToMove, from_sq(m)) > RANK_4;
 }
 
 inline Key Position::key() const {