tweack.

bench 3538137
Vizvezdenec · Mar 20, 2019 · 3cfe374 · 3cfe374
1 parent 1513839
commit 3cfe374
Showing 1 changed file with 2 additions and 1 deletion.
diff --git a/src/evaluate.cpp b/src/evaluate.cpp
@@ -653,7 +653,8 @@ namespace {
                     defendedSquares &= attackedBy[Us][ALL_PIECES];
 
                 if (!(pos.pieces(Them) & bb))
-                    unsafeSquares &= (attackedBy[Them][ALL_PIECES] | pos.pieces(Them)) & ~attackedBy[Us][PAWN];
+                    unsafeSquares &= ((attackedBy[Them][ALL_PIECES] & ~attackedBy[Us][ALL_PIECES]) | attackedBy2[Them] | pos.pieces(Them))
+                                     & ~attackedBy[Us][PAWN];
 
                 // If there aren't any enemy attacks, assign a big bonus. Otherwise
                 // assign a smaller bonus if the block square isn't attacked.