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Remove eval & beta diff from NM reduction

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Passed STC:
LLR: 2.94 (-2.94,2.94) <-1.75,0.25>
Total: 43456 W: 11178 L: 10966 D: 21312
Ptnml(0-2): 114, 5078, 11114, 5326, 96
https://tests.stockfishchess.org/tests/view/6849ae13e84567164b5c9de9

Passed LTC:
LLR: 2.94 (-2.94,2.94) <-1.75,0.25>
Total: 63090 W: 16302 L: 16125 D: 30663
Ptnml(0-2): 37, 6837, 17603, 7048, 20
https://tests.stockfishchess.org/tests/view/684ab516e84567164b5ca02f

closes https://github.com/official-stockfish/Stockfish/pull/6134

Bench: 2249459
This commit is contained in:
FauziAkram
2025-06-14 16:15:15 +03:00
committed by Disservin
parent ce7254b5ea
commit e695b9537e
1 changed files with 2 additions and 2 deletions
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4
src/search.cpp
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@@ -859,8 +859,8 @@ Value Search::Worker::search(
{ {
assert(eval - beta >= 0); assert(eval - beta >= 0);
// Null move dynamic reduction based on depth and eval // Null move dynamic reduction based on depth
Depth R = std::min(int(eval - beta) / 213, 6) + depth / 3 + 5; Depth R = 7 + depth / 3;
ss->currentMove = Move::null(); ss->currentMove = Move::null();
ss->continuationHistory = &thisThread->continuationHistory[0][0][NO_PIECE][0]; ss->continuationHistory = &thisThread->continuationHistory[0][0][NO_PIECE][0];