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Simplify Pawn History Bonus

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Passed Non-regression STC:
LLR: 2.98 (-2.94,2.94) <-1.75,0.25>
Total: 122016 W: 31655 L: 31525 D: 58836
Ptnml(0-2): 388, 14317, 31474, 14435, 394
https://tests.stockfishchess.org/tests/view/68f57e66637acd2a11e7221d

Passed Non-regression LTC:
LLR: 2.94 (-2.94,2.94) <-1.75,0.25>
Total: 81348 W: 21016 L: 20858 D: 39474
Ptnml(0-2): 45, 8793, 22841, 8949, 46
https://tests.stockfishchess.org/tests/view/68f9e2d9637acd2a11e72997

closes https://github.com/official-stockfish/Stockfish/pull/6382

Bench: 2370893
This commit is contained in:
Shawn Xu
2025-11-01 11:32:53 +01:00
committed by Joost VandeVondele
parent c9a2aff485
commit 0351652995
1 changed files with 1 additions and 1 deletions
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src/search.cpp
+1 -1
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@@ -1869,7 +1869,7 @@ void update_quiet_histories(
int pIndex = pawn_history_index(pos); int pIndex = pawn_history_index(pos);
workerThread.pawnHistory[pIndex][pos.moved_piece(move)][move.to_sq()] workerThread.pawnHistory[pIndex][pos.moved_piece(move)][move.to_sq()]
<< (bonus * (bonus > 0 ? 800 : 500) / 1024) + 70; << bonus * (bonus > 0 ? 850 : 550) / 1024;
} }
} }