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Remove nmpColor #4511

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Remove nmpColor #4511

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5 changes: 2 additions & 3 deletions src/search.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -800,7 +800,7 @@ namespace {
&& ss->staticEval >= beta - 20 * depth - improvement / 13 + 253 + complexity / 25
&& !excludedMove
&& pos.non_pawn_material(us)
&& (ss->ply >= thisThread->nmpMinPly || us != thisThread->nmpColor))
&& (ss->ply >= thisThread->nmpMinPly))
{
assert(eval - beta >= 0);

Expand Down Expand Up @@ -828,9 +828,8 @@ namespace {
assert(!thisThread->nmpMinPly); // Recursive verification is not allowed

// Do verification search at high depths, with null move pruning disabled
// for us, until ply exceeds nmpMinPly.
// until ply exceeds nmpMinPly.
thisThread->nmpMinPly = ss->ply + 3 * (depth-R) / 4;
thisThread->nmpColor = us;

Value v = search<NonPV>(pos, ss, beta-1, beta, depth-R, false);

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1 change: 0 additions & 1 deletion src/thread.h
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Expand Up @@ -62,7 +62,6 @@ class Thread {
size_t pvIdx, pvLast;
std::atomic<uint64_t> nodes, tbHits, bestMoveChanges;
int selDepth, nmpMinPly;
Color nmpColor;
Value bestValue, optimism[COLOR_NB];

Position rootPos;
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