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Merge exclusion search conditions

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No functional change.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
This commit is contained in:
Marco Costalba
2012-07-14 12:18:14 +01:00
parent 6e5a334c95
commit 5dc0df8435
1 changed files with 11 additions and 12 deletions
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23
src/search.cpp
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@@ -874,19 +874,18 @@ split_point_start: // At split points actual search starts from here
if ( singularExtensionNode
&& !ext
&& move == ttMove
&& pos.pl_move_is_legal(move, ci.pinned))
&& pos.pl_move_is_legal(move, ci.pinned)
&& abs(ttValue) < VALUE_KNOWN_WIN)
{
if (abs(ttValue) < VALUE_KNOWN_WIN)
{
Value rBeta = ttValue - int(depth);
ss->excludedMove = move;
ss->skipNullMove = true;
value = search<NonPV>(pos, ss, rBeta - 1, rBeta, depth / 2);
ss->skipNullMove = false;
ss->excludedMove = MOVE_NONE;
if (value < rBeta)
ext = ONE_PLY;
}
Value rBeta = ttValue - int(depth);
ss->excludedMove = move;
ss->skipNullMove = true;
value = search<NonPV>(pos, ss, rBeta - 1, rBeta, depth / 2);
ss->skipNullMove = false;
ss->excludedMove = MOVE_NONE;
if (value < rBeta)
ext = ONE_PLY;
}
// Update current move (this must be done after singular extension search)