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Simplify dual bonuses

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Merge dual capture/quiet bonuses into one

Passed simplification STC
LLR: 2.93 (-2.94,2.94) <-1.75,0.25>
Total: 223200 W: 57868 L: 57854 D: 107478
Ptnml(0-2): 689, 26441, 57296, 26515, 659
https://tests.stockfishchess.org/tests/view/6898d28e0049e8ccef9d6384

Passed simplification LTC
LLR: 2.95 (-2.94,2.94) <-1.75,0.25>
Total: 147270 W: 37750 L: 37659 D: 71861
Ptnml(0-2): 84, 15869, 41633, 15970, 79
https://tests.stockfishchess.org/tests/view/68990fe30049e8ccef9d643c

closes https://github.com/official-stockfish/Stockfish/pull/6226

Bench: 2996176
This commit is contained in:
Daniel Monroe
2025-08-16 12:12:07 +02:00
committed by Joost VandeVondele
parent c9c002450a
commit 169737a9eb
1 changed files with 3 additions and 4 deletions
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src/search.cpp
+3 -4
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@@ -1816,14 +1816,13 @@ void update_all_stats(const Position& pos,
Piece movedPiece = pos.moved_piece(bestMove);
PieceType capturedPiece;
int quietBonus = std::min(170 * depth - 87, 1598) + 332 * (bestMove == ttMove);
int bonus = std::min(170 * depth - 87, 1598) + 332 * (bestMove == ttMove);
int quietMalus = std::min(743 * depth - 180, 2287) - 33 * quietsSearched.size();
int captureBonus = std::min(124 * depth - 62, 1245) + 336 * (bestMove == ttMove);
int captureMalus = std::min(708 * depth - 148, 2287) - 29 * capturesSearched.size();
if (!pos.capture_stage(bestMove))
{
update_quiet_histories(pos, ss, workerThread, bestMove, quietBonus * 978 / 1024);
update_quiet_histories(pos, ss, workerThread, bestMove, bonus * 978 / 1024);
// Decrease stats for all non-best quiet moves
for (Move move : quietsSearched)
@@ -1833,7 +1832,7 @@ void update_all_stats(const Position& pos,
{
// Increase stats for the best move in case it was a capture move
capturedPiece = type_of(pos.piece_on(bestMove.to_sq()));
captureHistory[movedPiece][bestMove.to_sq()][capturedPiece] << captureBonus * 1288 / 1024;
captureHistory[movedPiece][bestMove.to_sq()][capturedPiece] << bonus;
}
// Extra penalty for a quiet early move that was not a TT move in