Simplify HinderPassedPawn bonus

[stockfish] / src / evaluate.cpp

diff --git a/src/evaluate.cpp b/src/evaluate.cpp
index de9574fba5611be5d3282490ea42c3b3b6cba80f..42ce525882f5d47bf9937328cbb03ba8b59de02e 100644 (file)
--- a/src/evaluate.cpp
+++ b/src/evaluate.cpp
@@ -647,7 +647,7 @@ namespace {
 
         assert(!(pos.pieces(Them, PAWN) & forward_file_bb(Us, s + Up)));
 
 
         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);
         score -= HinderPassedPawn * popcount(bb);
 
         int r = relative_rank(Us, s);