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For expected ALL nodes scale up reduction with depth dependent factor.

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Passed STC:
LLR: 2.93 (-2.94,2.94) <0.00,2.00>
Total: 141120 W: 36860 L: 36390 D: 67870
Ptnml(0-2): 470, 16441, 36314, 16819, 516
https://tests.stockfishchess.org/tests/view/694978e93c8768ca45072763

Passed LTC:
LLR: 2.94 (-2.94,2.94) <0.50,2.50>
Total: 66576 W: 17078 L: 16700 D: 32798
Ptnml(0-2): 45, 7093, 18628, 7483, 39
https://tests.stockfishchess.org/tests/view/694bb608572093c1986d6ba6

closes https://github.com/official-stockfish/Stockfish/pull/6496

Bench: 2503391
This commit is contained in:
Stefan Geschwentner
2025-12-28 14:55:55 +01:00
committed by Disservin
parent b2e60960b3
commit 1780c1fd6e
1 changed files with 4 additions and 0 deletions
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src/search.cpp
+4
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@@ -1222,6 +1222,10 @@ moves_loop: // When in check, search starts here
// Decrease/increase reduction for moves with a good/bad history // Decrease/increase reduction for moves with a good/bad history
r -= ss->statScore * 850 / 8192; r -= ss->statScore * 850 / 8192;
// Scale up reductions for expected ALL nodes
if (allNode)
r += r / (depth + 1);
// Step 17. Late moves reduction / extension (LMR) // Step 17. Late moves reduction / extension (LMR)
if (depth >= 2 && moveCount > 1) if (depth >= 2 && moveCount > 1)
{ {