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Simplify best move effort

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Passed non-regression STC
LLR: 2.96 (-2.94,2.94) <-1.75,0.25>
Total: 44224 W: 11614 L: 11403 D: 21207
Ptnml(0-2): 147, 4936, 11726, 5165, 138
https://tests.stockfishchess.org/tests/view/68e9410ed323fd15c04e3a87

Passed non-regression LTC
LLR: 2.94 (-2.94,2.94) <-1.75,0.25>
Total: 109788 W: 28223 L: 28096 D: 53469
Ptnml(0-2): 60, 11493, 31657, 11628, 56
https://tests.stockfishchess.org/tests/view/68eb5ac0a23744016c14af1d

closes https://github.com/official-stockfish/Stockfish/pull/6371

No functional change
This commit is contained in:
Daniel Monroe
2025-11-01 11:18:00 +01:00
committed by Joost VandeVondele
parent 11ab4cde07
commit 9e071f3561
1 changed files with 3 additions and 6 deletions
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src/search.cpp
+3 -6
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@@ -479,9 +479,10 @@ void Search::Worker::iterative_deepening() {
double reduction =
(1.455 + mainThread->previousTimeReduction) / (2.2375 * timeReduction);
double bestMoveInstability = 1.04 + 1.8956 * totBestMoveChanges / threads.size();
double highBestMoveEffort = completedDepth >= 10 && nodesEffort >= 92425 ? 0.666 : 1.0;
double totalTime =
mainThread->tm.optimum() * fallingEval * reduction * bestMoveInstability;
double totalTime = mainThread->tm.optimum() * fallingEval * reduction
* bestMoveInstability * highBestMoveEffort;
// Cap used time in case of a single legal move for a better viewer experience
if (rootMoves.size() == 1)
@@ -489,10 +490,6 @@ void Search::Worker::iterative_deepening() {
auto elapsedTime = elapsed();
if (completedDepth >= 10 && nodesEffort >= 92425 && elapsedTime > totalTime * 0.666
&& !mainThread->ponder)
threads.stop = true;
// Stop the search if we have exceeded the totalTime or maximum
if (elapsedTime > std::min(totalTime, double(mainThread->tm.maximum())))
{