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Simplify multi-cut condition now that it is safer 

Bench: 5905086
pull/3738/head
Joseph Ellis 2021-10-13 11:10:50 -05:00
parent c8459b18ba
commit 6fbdfb4256
1 changed files with 2 additions and 11 deletions
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13
src/search.cpp
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@ -1123,18 +1123,9 @@ moves_loop: // When in check, search starts here
else if (singularBeta >= beta)
return singularBeta;
// If the eval of ttMove is greater than beta we try also if there is another
// move that pushes it over beta, if so the position also has probably multiple
// moves giving fail highs. We will then reduce the ttMove (negative extension).
// If the eval of ttMove is greater than beta we reduce the ttMove (negative extension).
else if (ttValue >= beta)
{
ss->excludedMove = move;
value = search<NonPV>(pos, ss, beta - 1, beta, (depth + 3) / 2, cutNode);
ss->excludedMove = MOVE_NONE;
if (value >= beta)
extension = -2;
}
extension = -2;
}
// Capture extensions for PvNodes and cutNodes