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Simplify ttMove reduction formula

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Passed STC non-reg:
LLR: 2.94 (-2.94,2.94) <-1.75,0.25>
Total: 110720 W: 28313 L: 28180 D: 54227
Ptnml(0-2): 230, 12259, 30279, 12332, 260
https://tests.stockfishchess.org/tests/view/69fa69c83a3c3e525bb2b645

Passed LTC non-reg:
LLR: 2.94 (-2.94,2.94) <-1.75,0.25>
Total: 307728 W: 77955 L: 78027 D: 151746
Ptnml(0-2): 138, 33481, 86698, 33409, 138
https://tests.stockfishchess.org/tests/view/6a00a2549392f0c317214085

closes https://github.com/official-stockfish/Stockfish/pull/6826

Bench: 2559757
This commit is contained in:
FauziAkram
2026-05-17 20:51:07 +02:00
committed by Joost VandeVondele
parent 3fcd374ad4
commit f8aa78e0a7
1 changed files with 1 additions and 1 deletions
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src/search.cpp
+1 -1
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@@ -1268,7 +1268,7 @@ moves_loop: // When in check, search starts here
// For first picked move (ttMove) reduce reduction
else if (move == ttData.move)
r = std::max(-10, r - 2016 + 150 * cutNode);
r -= 2016 + 150 * cutNode;
if (capture)
ss->statScore = 809 * int(PieceValue[pos.captured_piece()]) / 128