From: Marco Costalba <mcostalba@gmail.com>
Date: Sun, 9 Dec 2012 13:19:21 +0000 (+0100)
Subject: Fix comparison with alpha, not beta
X-Git-Url: https://git.sesse.net/?p=stockfish;a=commitdiff_plain;h=55db87147237e84a4a2341ca10fb56c1ccfac32c;ds=sidebyside

Fix comparison with alpha, not beta

This silly bug seems the reason of the unsual bench
value.

bench: 6261882
---

diff --git a/src/search.cpp b/src/search.cpp
index 07405d42..98f3e3fd 100644
--- a/src/search.cpp
+++ b/src/search.cpp
@@ -573,7 +573,7 @@ namespace {
 
         // Fail Low
         if (  (tte->type() & BOUND_UPPER)
-            && ttValueUpper < beta
+            && ttValueUpper <= alpha
             && tte->depth_upper() >= depth
             && ttValueUpper != VALUE_NONE) // Only in case of TT access race
         {
@@ -1144,7 +1144,7 @@ split_point_start: // At split points actual search starts from here
 
         // Fail Low
         if (  (tte->type() & BOUND_UPPER)
-            && ttValueUpper < beta
+            && ttValueUpper <= alpha
             && tte->depth_upper() >= ttDepth
             && ttValueUpper != VALUE_NONE) // Only in case of TT access race
         {