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stockfish
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adding the range

pull/3717/head
OfekShochat 2021-09-24 08:36:12 +03:00
parent cd519384ea
commit 19e18c609b
1 changed files with 6 additions and 6 deletions
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12
src/search.cpp
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@ -918,7 +918,7 @@ moves_loop: // When in check, search starts here
ttCapture = ttMove && pos.capture_or_promotion(ttMove);
bool b = false;
int b = 0;
// Step 11. A small Probcut idea, when we are in check
probCutBeta = beta + 409;
if ( ss->inCheck
@ -1006,7 +1006,7 @@ moves_loop: // When in check, search starts here
moveCountPruning = moveCount >= futility_move_count(improving, depth);
// Reduced depth of the next LMR search
int lmrDepth = std::max(newDepth - reduction(improving, depth, moveCount, b), 0);
int lmrDepth = std::max(newDepth - reduction(improving, depth, moveCount, b > 1), 0);
if ( captureOrPromotion
|| givesCheck)
@ -1141,7 +1141,7 @@ moves_loop: // When in check, search starts here
|| !ss->ttPv)
&& (!PvNode || ss->ply > 1 || thisThread->id() % 4 != 3))
{
Depth r = reduction(improving, depth, moveCount, b);
Depth r = reduction(improving, depth, moveCount, b > 1);
if (PvNode)
r--;
@ -1192,6 +1192,9 @@ moves_loop: // When in check, search starts here
Depth d = std::clamp(newDepth - r, 1, newDepth + (r < -1 && (moveCount <= 5 || (depth > 6 && PvNode)) && !doubleExtension));
value = -search<NonPV>(pos, ss+1, -(alpha+1), -alpha, d, true);
if (ss->staticEval - value < 30 && depth > 7) {
b += 1;
}
// If the son is reduced and fails high it will be re-searched at full depth
doFullDepthSearch = value > alpha && d < newDepth;
@ -1228,9 +1231,6 @@ moves_loop: // When in check, search starts here
value = -search<PV>(pos, ss+1, -beta, -alpha,
std::min(maxNextDepth, newDepth), false);
if (value > ss->staticEval) {
b = true;
}
}
// Step 18. Undo move