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Further increase reductions with increasing number of threads

Browse source 
This patch doubles the reduction increase with thread count.

passed STC
https://tests.stockfishchess.org/tests/view/5e874f5a4411759d9d098696
LLR: 2.94 (-2.94,2.94) {-0.50,1.50}
Total: 9162 W: 1558 L: 1385 D: 6219
Ptnml(0-2): 90, 958, 2343, 1069, 121

passed LTC
https://tests.stockfishchess.org/tests/view/5e8762804411759d9d09869f
LLR: 2.94 (-2.94,2.94) {0.25,1.75}
Total: 79364 W: 9541 L: 9159 D: 60664
Ptnml(0-2): 462, 6880, 24661, 7172, 507

closes https://github.com/official-stockfish/Stockfish/pull/2615

bench 4831963
This commit is contained in:
Vizvezdenec 2020-04-04 18:06:13 +03:00 • committed by Joost VandeVondele
parent fbc7a328c6
commit 85bcf4741e
1 changed files with 1 additions and 1 deletions
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2
src/search.cpp
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@ -194,7 +194,7 @@ namespace {
void Search::init() {
for (int i = 1; i < MAX_MOVES; ++i)
Reductions[i] = int((24.8 + std::log(Threads.size()) / 2) * std::log(i));
Reductions[i] = int((24.8 + std::log(Threads.size())) * std::log(i));
}