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Simplify TT cutoff conthist updates

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Passed Non-regression STC:
LLR: 2.95 (-2.94,2.94) <-1.75,0.25>
Total: 86304 W: 22251 L: 22084 D: 41969
Ptnml(0-2): 250, 10214, 22123, 10249, 316
https://tests.stockfishchess.org/tests/view/67db60cd8c7f315cc372aae7

Passed Non-regression LTC:
LLR: 2.94 (-2.94,2.94) <-1.75,0.25>
Total: 199158 W: 50655 L: 50617 D: 97886
Ptnml(0-2): 103, 21579, 56182, 21607, 108
https://tests.stockfishchess.org/tests/view/67dcdc5b8c7f315cc372ac12

closes https://github.com/official-stockfish/Stockfish/pull/5945

Bench: 2069191
This commit is contained in:
Shawn Xu
2025-03-19 17:06:11 -07:00
committed by Disservin
parent dfef7e7520
commit d2cb927a04
1 changed files with 1 additions and 2 deletions
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3
src/search.cpp
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@@ -720,8 +720,7 @@ Value Search::Worker::search(
// Extra penalty for early quiet moves of the previous ply
if (prevSq != SQ_NONE && (ss - 1)->moveCount <= 3 && !priorCapture)
update_continuation_histories(ss - 1, pos.piece_on(prevSq), prevSq,
-std::min(809 * (depth + 1) - 249, 3052));
update_continuation_histories(ss - 1, pos.piece_on(prevSq), prevSq, -2200);
}
// Partial workaround for the graph history interaction problem