No NMP if unanswered promotion threat. Bench: 3478314

31m059 · Jul 15, 2019 · c435d4f · c435d4f
1 parent 8670795
commit c435d4f
Showing 1 changed file with 2 additions and 1 deletion.
diff --git a/src/search.cpp b/src/search.cpp
@@ -794,7 +794,8 @@ namespace {
         &&  ss->staticEval >= beta - 36 * depth / ONE_PLY + 225
         && !excludedMove
         &&  pos.non_pawn_material(us)
-        && !more_than_one(pos.pieces(~us, PAWN) & (us == WHITE ? Rank2BB : Rank7BB))
+        && (  !(pos.pieces(~us, PAWN) & (us == WHITE ? Rank2BB : Rank7BB))
+            || (pos.pieces(us, PAWN)  & (us == WHITE ? Rank7BB : Rank2BB)))
         && (ss->ply >= thisThread->nmpMinPly || us != thisThread->nmpColor))
     {
         assert(eval - beta >= 0);