Avoid doing TT cutoffs in pv node

lynx-chess · Feb 11, 2024 · 666a422 · 666a422
1 parent d36e52a
commit 666a422
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/src/Lynx/Search/NegaMax.cs b/src/Lynx/Search/NegaMax.cs
@@ -45,7 +45,7 @@ private int NegaMax(int depth, int ply, int alpha, int beta, bool parentWasNullM
         if (!isRoot)
         {
             (ttEvaluation, ttBestMove, ttElementType) = _tt.ProbeHash(_ttMask, position, depth, ply, alpha, beta);
-            if (ttEvaluation != EvaluationConstants.NoHashEntry)
+            if (!pvNode && ttEvaluation != EvaluationConstants.NoHashEntry)
             {
                 return ttEvaluation;
             }