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Remove razoring history update.

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The recently commit 'Rewarding Quiet Moves that Enable Razoring' add a history update if razoring. But its contains also many tuned values all over the search. Following tests shows that the tuned values and not the added history update is responsible for the elo gain. So remove later.

Passed STC:
LLR: 2.93 (-2.94,2.94) <-1.75,0.25>
Total: 29376 W: 7641 L: 7410 D: 14325
Ptnml(0-2): 100, 3411, 7451, 3610, 116
https://tests.stockfishchess.org/tests/view/653c9fe1cc309ae839562070

Passed LTC:
LLR: 2.95 (-2.94,2.94) <-1.75,0.25>
Total: 242922 W: 59879 L: 59885 D: 123158
Ptnml(0-2): 129, 27764, 65688, 27744, 136
https://tests.stockfishchess.org/tests/view/653d06cbcc309ae839562735

closes https://github.com/official-stockfish/Stockfish/pull/4858

Bench: 1286104
This commit is contained in:
Stefan Geschwentner 2023-10-28 07:43:12 +02:00 • committed by Joost VandeVondele
parent 101d2bb8ea
commit 1cb9afbdc0
1 changed files with 0 additions and 11 deletions
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11
src/search.cpp
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@ -764,18 +764,7 @@ Value search(Position& pos, Stack* ss, Value alpha, Value beta, Depth depth, boo
{ {
value = qsearch<NonPV>(pos, ss, alpha - 1, alpha); value = qsearch<NonPV>(pos, ss, alpha - 1, alpha);
if (value < alpha) if (value < alpha)
{
if (!priorCapture && prevSq != SQ_NONE)
{
int bonus = (depth > 6) + (PvNode || cutNode) + (value < alpha - 658)
+ ((ss - 1)->moveCount > 11);
update_continuation_histories(ss - 1, pos.piece_on(prevSq), prevSq,
stat_bonus(depth) * bonus);
thisThread->mainHistory[~us][from_to((ss - 1)->currentMove)]
<< stat_bonus(depth) * bonus / 2;
}
return value; return value;
}
} }
// Step 8. Futility pruning: child node (~40 Elo) // Step 8. Futility pruning: child node (~40 Elo)