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Separate bonus/malus parameters for quiet and capture moves

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Parameters were tuned on 60k STC games.

Passed STC
LLR: 2.95 (-2.94,2.94) <0.00,2.00>
Total: 16928 W: 4570 L: 4277 D: 8081
Ptnml(0-2): 57, 1905, 4270, 2152, 80
https://tests.stockfishchess.org/tests/view/688b4486502b34dd5e711122

Passed LTC
LLR: 2.94 (-2.94,2.94) <0.50,2.50>
Total: 43602 W: 11373 L: 11041 D: 21188
Ptnml(0-2): 23, 4657, 12116, 4975, 30
https://tests.stockfishchess.org/tests/view/688c0eb5502b34dd5e71124b

Passed non-regression VLTC
LLR: 2.94 (-2.94,2.94) <-1.75,0.25>
Total: 181016 W: 46335 L: 46281 D: 88400
Ptnml(0-2): 33, 18177, 54034, 18231, 33
https://tests.stockfishchess.org/tests/view/688e0a77f17748b4d23c822b

closes https://github.com/official-stockfish/Stockfish/pull/6200

bench: 3435529
This commit is contained in:
KazApps
2025-08-09 08:43:49 +02:00
committed by Joost VandeVondele
parent 94175524b1
commit b177b7394a
1 changed files with 13 additions and 12 deletions
Download Patch File Download Diff File Expand all files Collapse all files
src/search.cpp
+13 -12
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@@ -129,8 +129,7 @@ void update_all_stats(const Position& pos,
SearchedList& quietsSearched,
SearchedList& capturesSearched,
Depth depth,
Move TTMove,
int moveCount);
Move TTMove);
} // namespace
@@ -1400,7 +1399,7 @@ moves_loop: // When in check, search starts here
else if (bestMove)
{
update_all_stats(pos, ss, *this, bestMove, prevSq, quietsSearched, capturesSearched, depth,
ttData.move, moveCount);
ttData.move);
if (!PvNode)
ttMoveHistory << (bestMove == ttData.move ? 811 : -848);
}
@@ -1811,42 +1810,44 @@ void update_all_stats(const Position& pos,
SearchedList& quietsSearched,
SearchedList& capturesSearched,
Depth depth,
Move ttMove,
int moveCount) {
Move ttMove) {
CapturePieceToHistory& captureHistory = workerThread.captureHistory;
Piece movedPiece = pos.moved_piece(bestMove);
PieceType capturedPiece;
int bonus = std::min(142 * depth - 88, 1501) + 318 * (bestMove == ttMove);
int malus = std::min(757 * depth - 172, 2848) - 30 * moveCount;
int quietBonus = 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, bonus * 1054 / 1024);
update_quiet_histories(pos, ss, workerThread, bestMove, quietBonus * 978 / 1024);
// Decrease stats for all non-best quiet moves
for (Move move : quietsSearched)
update_quiet_histories(pos, ss, workerThread, move, -malus * 1388 / 1024);
update_quiet_histories(pos, ss, workerThread, move, -quietMalus * 1115 / 1024);
}
else
{
// 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] << bonus * 1235 / 1024;
captureHistory[movedPiece][bestMove.to_sq()][capturedPiece] << captureBonus * 1288 / 1024;
}
// Extra penalty for a quiet early move that was not a TT move in
// previous ply when it gets refuted.
if (prevSq != SQ_NONE && ((ss - 1)->moveCount == 1 + (ss - 1)->ttHit) && !pos.captured_piece())
update_continuation_histories(ss - 1, pos.piece_on(prevSq), prevSq, -malus * 595 / 1024);
update_continuation_histories(ss - 1, pos.piece_on(prevSq), prevSq,
-captureMalus * 622 / 1024);
// Decrease stats for all non-best capture moves
for (Move move : capturesSearched)
{
movedPiece = pos.moved_piece(move);
capturedPiece = type_of(pos.piece_on(move.to_sq()));
captureHistory[movedPiece][move.to_sq()][capturedPiece] << -malus * 1354 / 1024;
captureHistory[movedPiece][move.to_sq()][capturedPiece] << -captureMalus * 1431 / 1024;
}
}