Simplify HinderPassedPawn bonus
[stockfish] / src / evaluate.cpp
index de9574f..42ce525 100644 (file)
@@ -647,7 +647,7 @@ namespace {
 
         assert(!(pos.pieces(Them, PAWN) & forward_file_bb(Us, s + Up)));
 
-        bb = forward_file_bb(Us, s) & (attackedBy[Them][ALL_PIECES] | pos.pieces(Them));
+        bb = forward_file_bb(Us, s) & pos.pieces(Them);
         score -= HinderPassedPawn * popcount(bb);
 
         int r = relative_rank(Us, s);