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Remove statScore condition in NMP

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Eliminate the condition that is nearly 100% likelihood of being true.

Passed non-regression STC:
LLR: 2.94 (-2.94,2.94) <-1.75,0.25>
Total: 208832 W: 54053 L: 54022 D: 100757
Ptnml(0-2): 753, 24987, 52901, 25026, 749
https://tests.stockfishchess.org/tests/view/66cddb50bf8c9d8780fdabaf

Passed non-regression LTC:
LLR: 2.94 (-2.94,2.94) <-1.75,0.25>
Total: 154344 W: 39132 L: 39047 D: 76165
Ptnml(0-2): 115, 17231, 42403, 17300, 123
https://tests.stockfishchess.org/tests/view/66cfafe39de3e7f9b33d1050

closes https://github.com/official-stockfish/Stockfish/pull/5558

Bench: 1393697
This commit is contained in:
MinetaS 2024-08-31 16:35:17 +09:00 • committed by Disservin
parent 2680c9c799
commit 6de2587236
1 changed files with 3 additions and 4 deletions
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7
src/search.cpp
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@ -773,10 +773,9 @@ Value Search::Worker::search(
return beta + (eval - beta) / 3; return beta + (eval - beta) / 3;
// Step 9. Null move search with verification search (~35 Elo) // Step 9. Null move search with verification search (~35 Elo)
if (cutNode && (ss - 1)->currentMove != Move::null() && (ss - 1)->statScore < 14389 if (cutNode && (ss - 1)->currentMove != Move::null() && eval >= beta
&& eval >= beta && ss->staticEval >= beta - 21 * depth + 390 && !excludedMove && ss->staticEval >= beta - 21 * depth + 390 && !excludedMove && pos.non_pawn_material(us)
&& pos.non_pawn_material(us) && ss->ply >= thisThread->nmpMinPly && ss->ply >= thisThread->nmpMinPly && beta > VALUE_TB_LOSS_IN_MAX_PLY)
&& beta > VALUE_TB_LOSS_IN_MAX_PLY)
{ {
assert(eval - beta >= 0); assert(eval - beta >= 0);