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Try only strange stat_bonus change from searchconsttune3.

Bench 4201275
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xoto10 committed Sep 11, 2019
1 parent 8fec883 commit cf100bafa2278513ad0a4b1c0e842417249154c4
Showing with 1 addition and 1 deletion.
  1. +1 −1 src/search.cpp
@@ -82,7 +82,7 @@ namespace {
// History and stats update bonus, based on depth
int stat_bonus(Depth depth) {
int d = depth / ONE_PLY;
return d > 17 ? -8 : 22 * d * d + 151 * d - 140;
return d > 17 ? -7 : 19 * d * d + 111 * d - 151;
}

// Add a small random component to draw evaluations to avoid 3fold-blindness

3 comments on commit cf100ba

@locutus2

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replied Sep 11, 2019

So fare this seems ok after less then 2000 games despite the negative value for depth=1. I would also try a variation by adding 54 to the formula so that for depth = 1 the same bonus is used than in master.

@xoto10

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replied Sep 11, 2019

@locutus2
So that would be ... 111 * d - 97, is that correct?

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replied Sep 11, 2019

@xoto10
Yes, correct.

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