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Sync history and counter moves updating

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Change updating rule after a TT hit to match
the same one at the end of the search.

Small change in functionality, but we want to
have uniform rules in the code.

bench: 7767864
This commit is contained in:
Marco Costalba
2013-12-10 07:05:06 +01:00
parent 86347100a5
commit b96079f86b
1 changed files with 6 additions and 3 deletions
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9
src/search.cpp
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@@ -573,10 +573,13 @@ namespace {
if ( ttValue >= beta
&& ttMove
&& !pos.capture_or_promotion(ttMove)
&& ttMove != ss->killers[0])
&& !inCheck)
{
ss->killers[1] = ss->killers[0];
ss->killers[0] = ttMove;
if (ss->killers[0] != ttMove)
{
ss->killers[1] = ss->killers[0];
ss->killers[0] = ttMove;
}
Value bonus = Value(int(depth) * int(depth));
History.update(pos.moved_piece(ttMove), to_sq(ttMove), bonus);