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Simplify both quiet check evasions' conditions

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passed Non-regression STC:
https://tests.stockfishchess.org/tests/view/6370b647f1b748d4819e0b64
LLR: 2.95 (-2.94,2.94) <-1.75,0.25>
Total: 162904 W: 43249 L: 43171 D: 76484
Ptnml(0-2): 491, 17089, 46220, 17155, 497

closes https://github.com/official-stockfish/Stockfish/pull/4228

No functional change
This commit is contained in:
peregrineshahin 2022-11-13 11:08:17 +02:00 • committed by Joost VandeVondele
parent 85ae65db1d
commit 1370127fcd
1 changed files with 4 additions and 5 deletions
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9
src/search.cpp
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@ -1552,12 +1552,11 @@ moves_loop: // When in check, search starts here
&& (*contHist[1])[pos.moved_piece(move)][to_sq(move)] < 0)
continue;
// movecount pruning for quiet check evasions
// We prune after 2nd quiet check evasion where being 'in check' is implicitly checked through the counter
// and being a 'quiet' apart from being a tt move is assumed after an increment because captures are pushed ahead.
if ( bestValue > VALUE_TB_LOSS_IN_MAX_PLY
&& quietCheckEvasions > 1
&& !capture
&& ss->inCheck)
continue;
&& quietCheckEvasions > 1)
break;
quietCheckEvasions += !capture && ss->inCheck;