From 03dd1d3c133577f33d34cbd8f0adc93dc85dc7ab Mon Sep 17 00:00:00 2001
From: Marco Costalba <mcostalba@gmail.com>
Date: Sat, 30 Oct 2010 15:28:33 +0100
Subject: [PATCH] Allow razoring after a null move

After 8322 games on Russian Cluster
Mod- Orig:  1341 - 1281 - 5700 ELO +2 (+- 3) LOS 75%

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

diff --git a/src/search.cpp b/src/search.cpp
index f7718ce4..66a27fa6 100644
--- a/src/search.cpp
+++ b/src/search.cpp
@@ -1070,7 +1070,6 @@ namespace {
         && !isCheck
         &&  refinedValue < beta - razor_margin(depth)
         &&  ttMove == MOVE_NONE
-        &&  (ss-1)->currentMove != MOVE_NULL
         && !value_is_mate(beta)
         && !pos.has_pawn_on_7th(pos.side_to_move()))
     {
-- 
2.39.2