From 9e3ab9099f056a864c2ac7596bf3474dce8ee167 Mon Sep 17 00:00:00 2001
From: Marco Costalba <mcostalba@gmail.com>
Date: Thu, 11 Dec 2008 16:27:27 +0100
Subject: [PATCH] Null move only for depth > OnePly

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
---
 src/search.cpp | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/search.cpp b/src/search.cpp
index 2fdc5ad1..a54d41b9 100644
--- a/src/search.cpp
+++ b/src/search.cpp
@@ -1139,6 +1139,7 @@ namespace {
 
     // Null move search
     if (    allowNullmove
+        &&  depth > OnePly
         && !isCheck
         &&  ok_to_do_nullmove(pos)
         &&  approximateEval >= beta - NullMoveMargin)
-- 
2.39.2