Small tweaks to recent code changes

[stockfish] / src / search.cpp

diff --git a/src/search.cpp b/src/search.cpp
index aa27ec2b02eec827a5bb7b5b7092d2043044d041..b4096ebad3559edc4dad28a99091e1365bad910e 100644 (file)
--- a/src/search.cpp
+++ b/src/search.cpp
@@ -935,8 +935,7 @@ moves_loop: // When in check, search starts from here
               int lmrDepth = std::max(newDepth - reduction<PvNode>(improving, depth, moveCount), DEPTH_ZERO) / ONE_PLY;
 
               // Countermoves based pruning (~20 Elo)
-              if (   lmrDepth < 4
-                  && (lmrDepth < 3 || ((ss - 1)->statScore > 0 && !PvNode))
+              if (   lmrDepth < 3 + ((ss-1)->statScore > 0)
                   && (*contHist[0])[movedPiece][to_sq(move)] < CounterMovePruneThreshold
                   && (*contHist[1])[movedPiece][to_sq(move)] < CounterMovePruneThreshold)
                   continue;