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Refine constant in correction history update

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Passed STC
LLR: 3.04 (-2.94,2.94) <0.00,2.00>
Total: 250112 W: 65277 L: 64635 D: 120200
Ptnml(0-2): 841, 29326, 64134, 29860, 895
https://tests.stockfishchess.org/tests/view/69096c46ea4b268f1fac2a39

Passed LTC
LLR: 2.96 (-2.94,2.94) <0.50,2.50>
Total: 142908 W: 37141 L: 36604 D: 69163
Ptnml(0-2): 100, 15478, 39742, 16053, 81
https://tests.stockfishchess.org/tests/view/690e7dfbec1d00d2c195c351

closes https://github.com/official-stockfish/Stockfish/pull/6405

bench 2613869
This commit is contained in:
Daniel Monroe
2025-11-13 22:10:30 +01:00
committed by Joost VandeVondele
parent 8e5392d79a
commit 7ac8e62219
1 changed files with 3 additions and 3 deletions
Download Patch File Download Diff File Expand all files Collapse all files
src/search.cpp
+3 -3
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@@ -1452,9 +1452,9 @@ moves_loop: // When in check, search starts here
if (!ss->inCheck && !(bestMove && pos.capture(bestMove))
&& (bestValue < ss->staticEval) == !bestMove)
{
auto bonus =
std::clamp(int(bestValue - ss->staticEval) * depth / (8 + (bestValue > ss->staticEval)),
-CORRECTION_HISTORY_LIMIT / 4, CORRECTION_HISTORY_LIMIT / 4);
auto bonus = std::clamp(int(bestValue - ss->staticEval) * depth
/ (8 + 2 * (bestValue > ss->staticEval)),
-CORRECTION_HISTORY_LIMIT / 4, CORRECTION_HISTORY_LIMIT / 4);
update_correction_history(pos, ss, *this, bonus);
}