Reintroduce null move dynamic reduction

[stockfish] / src / search.cpp

diff --git a/src/search.cpp b/src/search.cpp
index 4449b1be0e2f4408bcb8b792b776221c4aa81517..b4e9b14c6c5073c540cb33fc5657c80991a96ba2 100644 (file)
--- a/src/search.cpp
+++ b/src/search.cpp
@@ -1364,7 +1364,7 @@ namespace {
 
       // Try to reduce non-pv search depth by one ply if move seems not problematic,
       // if the move fails high will be re-searched at full depth.
-      if (    depth >= 2*OnePly
+      if (    depth >= 3*OnePly
           &&  moveCount >= LMRNonPVMoves
           && !dangerous
           && !moveIsCapture