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Simplify PvNode reduction

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Simplification STC: https://tests.stockfishchess.org/tests/view/64a415803ee09aa549c539c3
LLR: 2.93 (-2.94,2.94) <-1.75,0.25>
Total: 37856 W: 9719 L: 9504 D: 18633
Ptnml(0-2): 98, 4277, 9977, 4464, 112

Simplification LTC: https://tests.stockfishchess.org/tests/view/64a5ffe202cd07745c60f360
LLR: 2.96 (-2.94,2.94) <-1.75,0.25>
Total: 55878 W: 14323 L: 14138 D: 27417
Ptnml(0-2): 21, 5993, 15732, 6166, 27

closes https://github.com/official-stockfish/Stockfish/pull/4673

Bench: 2604965
This commit is contained in:
Muzhen Gaming 2023-07-07 20:19:31 +08:00 • committed by Joost VandeVondele
parent ee023d7fd7
commit 6a8767a0d5
1 changed files with 1 additions and 1 deletions
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src/search.cpp
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@ -1162,7 +1162,7 @@ moves_loop: // When in check, search starts here
// Decrease reduction for PvNodes based on depth (~2 Elo)
if (PvNode)
r -= 1 + 12 / (3 + depth);
r -= 1 + (depth < 6);
// Decrease reduction if ttMove has been singularly extended (~1 Elo)
if (singularQuietLMR)