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Simplify sign term in quiet histories

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Simplify sign term in quiet histories

Passed simplification STC
LLR: 2.94 (-2.94,2.94) <-1.75,0.25>
Total: 497824 W: 129130 L: 129418 D: 239276
Ptnml(0-2): 1546, 59040, 128008, 58792, 1526
https://tests.stockfishchess.org/tests/view/68a2a9c1b6fb3300203bc3ed

Passed simplification LTC
LLR: 2.94 (-2.94,2.94) <-1.75,0.25>
Total: 70830 W: 18185 L: 18016 D: 34629
Ptnml(0-2): 36, 7658, 19861, 7821, 39
https://tests.stockfishchess.org/tests/view/68af36c96217b8721dca98d9

closes https://github.com/official-stockfish/Stockfish/pull/6282

Bench: 2393762
This commit is contained in:
Daniel Monroe
2025-09-02 20:37:04 +02:00
committed by Joost VandeVondele
parent 3833583862
commit da63060ea3
1 changed files with 1 additions and 2 deletions
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src/search.cpp
+1 -2
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@@ -1869,8 +1869,7 @@ void update_quiet_histories(
if (ss->ply < LOW_PLY_HISTORY_SIZE)
workerThread.lowPlyHistory[ss->ply][move.from_to()] << (bonus * 741 / 1024) + 38;
update_continuation_histories(ss, pos.moved_piece(move), move.to_sq(),
bonus * (bonus > 0 ? 995 : 915) / 1024);
update_continuation_histories(ss, pos.moved_piece(move), move.to_sq(), bonus * 955 / 1024);
int pIndex = pawn_history_index(pos);
workerThread.pawnHistory[pIndex][pos.moved_piece(move)][move.to_sq()]