Fix comparison with alpha, not beta

[stockfish] / src / search.cpp

diff --git a/src/search.cpp b/src/search.cpp
index 07405d42beed4a52f586d0ccae66c4b327797226..98f3e3fdf0ca44553b279ff9e024cd7c7cb746ed 100644 (file)
--- 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
         {