singular margin += 20*pvHit

Bench: 3115075
snicolet · Jan 11, 2019 · b480cc4 · b480cc4
1 parent 9bd5e05
commit b480cc4
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/src/search.cpp b/src/search.cpp
@@ -949,7 +949,7 @@ namespace {
           &&  tte->depth() >= depth - 3 * ONE_PLY
           &&  pos.legal(move))
       {
-          Value singularBeta = std::max(ttValue - 2 * depth / ONE_PLY - 10 * pvHit, -VALUE_MATE);
+          Value singularBeta = std::max(ttValue - 2 * depth / ONE_PLY - 20 * pvHit, -VALUE_MATE);
 
           ss->excludedMove = move;
           value = search<NonPV>(pos, ss, singularBeta - 1, singularBeta, depth / 2, cutNode);