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Simplify In-Check Statscore

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Passed Non-regression STC:
LLR: 2.98 (-2.94,2.94) <-1.75,0.25>
Total: 129760 W: 33701 L: 33580 D: 62479
Ptnml(0-2): 359, 15248, 33575, 15309, 389
https://tests.stockfishchess.org/tests/view/681a88193629b02d74b17123

Passed Non-regression LTC:
LLR: 2.94 (-2.94,2.94) <-1.75,0.25>
Total: 519612 W: 132224 L: 132512 D: 254876
Ptnml(0-2): 246, 56823, 145960, 56527, 250
https://tests.stockfishchess.org/tests/view/681f9ed43629b02d74b177c3

closes https://github.com/official-stockfish/Stockfish/pull/6070

bench: 2046462
This commit is contained in:
Shawn Xu
2025-05-06 15:05:24 -07:00
committed by Joost VandeVondele
parent 6e9b5af0f0
commit 39942db3ff
1 changed files with 1 additions and 4 deletions
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5
src/search.cpp
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@@ -1237,13 +1237,10 @@ moves_loop: // When in check, search starts here
826 * int(PieceValue[pos.captured_piece()]) / 128
+ thisThread->captureHistory[movedPiece][move.to_sq()][type_of(pos.captured_piece())]
- 5030;
else if (ss->inCheck)
ss->statScore = thisThread->mainHistory[us][move.from_to()]
+ (*contHist[0])[movedPiece][move.to_sq()] - 2766;
else
ss->statScore = 2 * thisThread->mainHistory[us][move.from_to()]
+ (*contHist[0])[movedPiece][move.to_sq()]
+ (*contHist[1])[movedPiece][move.to_sq()] - 3206;
+ (*contHist[1])[movedPiece][move.to_sq()] + 1000 * ss->inCheck - 3206;
// Decrease/increase reduction for moves with a good/bad history
r -= ss->statScore * 826 / 8192;