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refactor prior reduction #5832

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refactor prior reduction #5832

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8 changes: 4 additions & 4 deletions src/search.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -579,8 +579,8 @@ Value Search::Worker::search(
Value bestValue, value, eval, maxValue, probCutBeta;
bool givesCheck, improving, priorCapture, opponentWorsening;
bool capture, ttCapture;
int priorReduction = ss->reduction;
ss->reduction = 0;
int priorReduction = (ss-1)->reduction;
(ss-1)->reduction = 0;
Piece movedPiece;

ValueList<Move, 32> capturesSearched;
Expand Down Expand Up @@ -1194,10 +1194,10 @@ Value Search::Worker::search(
Depth d = std::max(
1, std::min(newDepth - r / 1024, newDepth + !allNode + (PvNode && !bestMove)));

(ss + 1)->reduction = newDepth - d;
ss->reduction = newDepth - d;

value = -search<NonPV>(pos, ss + 1, -(alpha + 1), -alpha, d, true);
(ss + 1)->reduction = 0;
ss->reduction = 0;


// Do a full-depth search when reduced LMR search fails high
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