Try to prune also when approximateEval < beta

[stockfish] / src / search.cpp

diff --git a/src/search.cpp b/src/search.cpp
index 4b93a210b59ed218c3d7081653e736801eb6f391..5bbc0abd2d58514870af54133786b3595dcdc563 100644 (file)
--- a/src/search.cpp
+++ b/src/search.cpp
@@ -1517,19 +1517,16 @@ namespace {
               continue;
 
           // Value based pruning
-          if (approximateEval < beta)
-          {
-              if (futilityValue == VALUE_NONE)
-                  futilityValue = evaluate(pos, ei, threadID) + FutilityValueMargin;
+          if (futilityValue == VALUE_NONE)
+              futilityValue = evaluate(pos, ei, threadID) + FutilityValueMargin;
 
-              futilityValueScaled = futilityValue - moveCount * IncrementalFutilityMargin;
+          futilityValueScaled = futilityValue - moveCount * IncrementalFutilityMargin;
 
-              if (futilityValueScaled < beta)
-              {
-                  if (futilityValueScaled > bestValue)
-                      bestValue = futilityValueScaled;
-                  continue;
-              }
+          if (futilityValueScaled < beta)
+          {
+              if (futilityValueScaled > bestValue)
+                  bestValue = futilityValueScaled;
+              continue;
           }
       }