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Simplify cutnode reduction formula

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Passed STC:
LLR: 2.94 (-2.94,2.94) <-1.75,0.25>
Total: 137994 W: 34705 L: 34603 D: 68686
Ptnml(0-2): 124, 15371, 37903, 15477, 122
https://tests.stockfishchess.org/tests/view/66aeb74b4ff211be9d4eda10

Passed LTC:
LLR: 2.93 (-2.94,2.94) <-1.75,0.25>
Total: 131456 W: 34148 L: 34031 D: 63277
Ptnml(0-2): 506, 15571, 33465, 15672, 514
https://tests.stockfishchess.org/tests/view/66ae258b4ff211be9d4ed95d

closes https://github.com/official-stockfish/Stockfish/pull/5531

Bench: 1261995
This commit is contained in:
FauziAkram 2024-08-10 13:06:28 +03:00 • committed by Joost VandeVondele
parent a75717ede1
commit 4995792a6c
1 changed files with 1 additions and 1 deletions
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2
src/search.cpp
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@ -1133,7 +1133,7 @@ moves_loop: // When in check, search starts here
// Increase reduction for cut nodes (~4 Elo)
if (cutNode)
r += 2 - (ttData.depth >= depth && ss->ttPv) + !ss->ttPv;
r += 2 - (ttData.depth >= depth && ss->ttPv);
// Increase reduction if ttMove is a capture (~3 Elo)
if (ttCapture)