Singular extension search tweak

[stockfish] / src / search.cpp

diff --git a/src/search.cpp b/src/search.cpp
index 201cd974d58dde631976c9da140c7e8bedddf1b7..37e3ff22b27ced0299542fe78b48540200d7b595 100644 (file)
--- a/src/search.cpp
+++ b/src/search.cpp
@@ -1072,7 +1072,7 @@ moves_loop: // When in check, search starts from here
       // then that move is singular and should be extended. To verify this we do
       // a reduced search on all the other moves but the ttMove and if the
       // result is lower than ttValue minus a margin, then we will extend the ttMove.
-      if (    depth >= 6
+      if (    depth >= 7
           &&  move == ttMove
           && !rootNode
           && !excludedMove // Avoid recursive singular search