Store score in TT when null search fails high

[stockfish] / src / tt.cpp

diff --git a/src/tt.cpp b/src/tt.cpp
index 8da3ca75767755f0e4198f98125fd0e23da12dfb..7efc6a0918872d6eb75be6f018c94667c720fc17 100644 (file)
--- a/src/tt.cpp
+++ b/src/tt.cpp
@@ -1,7 +1,7 @@
 /*
   Stockfish, a UCI chess playing engine derived from Glaurung 2.1
   Copyright (C) 2004-2008 Tord Romstad (Glaurung author)
-  Copyright (C) 2008-2009 Marco Costalba
+  Copyright (C) 2008-2010 Marco Costalba, Joona Kiiski, Tord Romstad
 
   Stockfish is free software: you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
@@ -125,6 +125,7 @@ void TranspositionTable::store(const Key posKey, Value v, ValueType t, Depth d,
           if (tte->key() && t == VALUE_TYPE_EV_LO)
               return;
 
+          // Preserve any exsisting ttMove
           if (m == MOVE_NONE)
               m = tte->move();