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Make reductionScale smoother

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Making the second part of the formula smoother, changing it to a linear
function, increasing steadily as reductionScale increases and at the
same time, it should be a little bit simpler, therefore the
simplification bounds.

Passed STC:
LLR: 2.94 (-2.94,2.94) <-1.75,0.25>
Total: 83040 W: 21493 L: 21322 D: 40225
Ptnml(0-2): 252, 9848, 21209, 9899, 312
https://tests.stockfishchess.org/tests/view/6762145486d5ee47d9543242

Passed LTC:
LLR: 2.94 (-2.94,2.94) <-1.75,0.25>
Total: 230124 W: 58485 L: 58478 D: 113161
Ptnml(0-2): 175, 25620, 63484, 25589, 194
https://tests.stockfishchess.org/tests/view/6762d4ef86d5ee47d9543367

closes https://github.com/official-stockfish/Stockfish/pull/5725

Bench: 1204658
This commit is contained in:
FauziAkram
2024-12-18 14:32:48 +03:00
committed by Disservin
parent 6075e787d0
commit a04b07265f
1 changed files with 1 additions and 1 deletions
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src/search.cpp
+1 -1
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@@ -1703,7 +1703,7 @@ Value Search::Worker::qsearch(Position& pos, Stack* ss, Value alpha, Value beta)
Depth Search::Worker::reduction(bool i, Depth d, int mn, int delta) const { Depth Search::Worker::reduction(bool i, Depth d, int mn, int delta) const {
int reductionScale = reductions[d] * reductions[mn]; int reductionScale = reductions[d] * reductions[mn];
return reductionScale - delta * 814 / rootDelta + (!i && reductionScale > 1423) * 1135 + 1304; return reductionScale - delta * 814 / rootDelta + !i * reductionScale / 3 + 1304;
} }
// elapsed() returns the time elapsed since the search started. If the // elapsed() returns the time elapsed since the search started. If the