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Penalise the TT move in multicut

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Passed STC:
LLR: 2.99 (-2.94,2.94) <0.00,2.00>
Total: 185504 W: 48079 L: 47533 D: 89892
Ptnml(0-2): 716, 21866, 46988, 22520, 662
https://tests.stockfishchess.org/tests/view/662d9e1d6115ff6764c7f83d

Passed LTC:
LLR: 2.94 (-2.94,2.94) <0.50,2.50>
Total: 75612 W: 19351 L: 18948 D: 37313
Ptnml(0-2): 46, 8363, 20592, 8752, 53
https://tests.stockfishchess.org/tests/view/662dc9dc6115ff6764c80fea

closes https://github.com/official-stockfish/Stockfish/pull/5195

Bench: 1415435
This commit is contained in:
cj5716 2024-04-28 08:53:28 +08:00 • committed by Disservin
parent a129c0695b
commit 834e8ff619
1 changed files with 5 additions and 0 deletions
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5
src/search.cpp
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@ -1067,7 +1067,12 @@ moves_loop: // When in check, search starts here
// we assume this expected cut-node is not singular (multiple moves fail high), // we assume this expected cut-node is not singular (multiple moves fail high),
// and we can prune the whole subtree by returning a softbound. // and we can prune the whole subtree by returning a softbound.
else if (singularBeta >= beta) else if (singularBeta >= beta)
{
if (!ttCapture)
update_quiet_stats(pos, ss, *this, ttMove, -stat_malus(depth));
return singularBeta; return singularBeta;
}
// Negative extensions // Negative extensions
// If other moves failed high over (ttValue - margin) without the ttMove on a reduced search, // If other moves failed high over (ttValue - margin) without the ttMove on a reduced search,