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Do more singular extensions. #4016

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Do more singular extensions. #4016

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2 changes: 1 addition & 1 deletion src/search.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -1061,7 +1061,7 @@ namespace {
// a reduced search on all the other moves but the ttMove and if the
// result is lower than ttValue minus a margin, then we will extend the ttMove.
if ( !rootNode
&& depth >= 4 + 2 * (PvNode && tte->is_pv())
&& depth >= 3 + 2 * (PvNode && tte->is_pv())
&& move == ttMove
&& !excludedMove // Avoid recursive singular search
/* && ttValue != VALUE_NONE Already implicit in the next condition */
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