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Simp probcut disable condition

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Disable probcut check when we the ttValue is not at least probCutBeta,
regardless of tt depth.

Passed simplification STC
LLR: 2.92 (-2.94,2.94) <-1.75,0.25>
Total: 60896 W: 16030 L: 15835 D: 29031
Ptnml(0-2): 220, 7164, 15507, 7315, 242
https://tests.stockfishchess.org/tests/view/679c0a3251037ccaf3e3141e

Passed simplification LTC
LLR: 2.94 (-2.94,2.94) <-1.75,0.25>
Total: 76644 W: 19557 L: 19392 D: 37695
Ptnml(0-2): 50, 8486, 21104, 8613, 69
https://tests.stockfishchess.org/tests/view/679c380b0774dfd78deaf35c

closes https://github.com/official-stockfish/Stockfish/pull/5840

Bench: 3543770
This commit is contained in:
Daniel Monroe
2025-01-30 15:24:25 -08:00
committed by Disservin
parent 40e0486d02
commit 7690fac5cf
1 changed files with 1 additions and 1 deletions
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2
src/search.cpp
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@@ -882,7 +882,7 @@ Value Search::Worker::search(
// probCut there and in further interactions with transposition table cutoff
// depth is set to depth - 3 because probCut search has depth set to depth - 4
// but we also do a move before it. So effective depth is equal to depth - 3.
&& !(ttData.depth >= depth - 3 && is_valid(ttData.value) && ttData.value < probCutBeta))
&& !(is_valid(ttData.value) && ttData.value < probCutBeta))
{
assert(probCutBeta < VALUE_INFINITE && probCutBeta > beta);