Fix a serious bug in TranspositionTable::retrieve()

Reported by Tord Romstad.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>

diff --git a/src/tt.cpp b/src/tt.cpp
index d7037a3..4ac685d 100644 (file)
--- a/src/tt.cpp
+++ b/src/tt.cpp
@@ -144,9 +144,8 @@ const TTEntry* TranspositionTable::retrieve(const Position &pos) const {
 
   TTEntry *tte = first_entry(pos);
 
-  for (int i = 0; i < 4; i++)
+  for (int i = 0; i < 4; i++, tte++)
   {
-      tte += i;
       if (tte->key() == pos.get_key())
           return tte;
   }