Take 4. Bench: 4871056

vondele · Dec 10, 2017 · 36f7361 · 36f7361
1 parent b997974
commit 36f7361
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/src/search.cpp b/src/search.cpp
@@ -689,7 +689,7 @@ namespace {
         // Null move dynamic reduction based on depth and value
         Depth R = ((823 + 67 * depth / ONE_PLY) / 256 + std::min((eval - beta) / PawnValueMg, 3)) * ONE_PLY;
 
-        if (!ttHit && depth - R < ONE_PLY && ss->staticEval - 2 * Eval::Tempo >= beta)
+        if (depth - R < ONE_PLY && ss->staticEval - 2 * Eval::Tempo >= beta && (!ttHit || tte->depth() <= depth / ONE_PLY ))
            return ss->staticEval - 2 * Eval::Tempo;
 
         ss->currentMove = MOVE_NULL;