Use special null move technique in low depth.

[stockfish] / src / search.cpp

diff --git a/src/search.cpp b/src/search.cpp
index 804108b42b3815487692eac98bfa866c69ad9a6d..944d9c6926a6b8a4e71eb0617f03743e5f380e0a 100644 (file)
--- a/src/search.cpp
+++ b/src/search.cpp
@@ -1282,7 +1282,7 @@ namespace {
     bool isCheck = pos.is_check();
 
     bool useNullMove = (    allowNullmove
-                        &&  depth > OnePly
+                        //&&  depth > OnePly
                         && !isCheck
                         && !value_is_mate(beta)
                         &&  ok_to_do_nullmove(pos)