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Widen the aspiration window for larger evals 

passed STC
LLR: 2.93 (-2.94,2.94) <-0.50,2.50>
Total: 36840 W: 9359 L: 9134 D: 18347
Ptnml(0-2): 111, 4130, 9722, 4337, 120
https://tests.stockfishchess.org/tests/view/617c601301c6d0988731d10a

passed LTC
LLR: 2.98 (-2.94,2.94) <0.50,3.50>
Total: 64824 W: 16377 L: 16043 D: 32404
Ptnml(0-2): 27, 6712, 18618, 7010, 45
https://tests.stockfishchess.org/tests/view/617c720d01c6d0988731d114

closes https://github.com/official-stockfish/Stockfish/pull/3768

Bench: 7683058
pull/3764/head^2
Joost VandeVondele 2021-10-29 17:45:09 +02:00
parent 7262fd5d14
commit 717d6c5ed5
1 changed files with 1 additions and 1 deletions
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2
src/search.cpp
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@ -380,7 +380,7 @@ void Thread::search() {
if (rootDepth >= 4)
{
Value prev = rootMoves[pvIdx].previousScore;
delta = Value(17);
delta = Value(17) + int(prev) * prev / 16384;
alpha = std::max(prev - delta,-VALUE_INFINITE);
beta = std::min(prev + delta, VALUE_INFINITE);