Increase bonus for multiple safe checks #2636
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Lolligerhans
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Adjusted the subject line twice. |
Lolligerhans
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It may be a good idea to tune 4 specific values instead of using 3/2 of the normal bonus. |
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Add 50% "safe checks" bonus when there are multiple safe checks from the
same piece type.
LTC
LLR: 2.97 (-2.94,2.94) {0.25,1.75}
Total: 128184 W: 16491 L: 15954 D: 95739
Ptnml(0-2): 884, 11793, 38267, 12198, 950
https://tests.stockfishchess.org/tests/view/5e97d1b6c9ada107a0370e03
STC
LLR: 2.94 (-2.94,2.94) {-0.50,1.50}
Total: 19022 W: 3733 L: 3514 D: 11775
Ptnml(0-2): 338, 2103, 4414, 2314, 342
https://tests.stockfishchess.org/tests/view/5e97c377c9ada107a0370ddf
Bench: 4962192
Lolligerhans
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@ddugovic I also tried doubling (factor 2) if more than one, which failed badly. If you want to try count (which is greater or equal to that) you will probably need to reduce the base bonus significantly. Note the multitude of check- or check-related bonuses which (may) interact with changes: kingAttackersCount, kingAttackersWeight, kingAttacksCount, unsafeChecks, safeChecks. |
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@Lolligerhans shud this be tested again on top of Fauzi's parameter changes, just wanted to confirm if the changes in this PR are not related (and | or interact with) to parameter tweaks made in Fauzi's PR? |
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@anshulongithub The changes do relate as this increase |
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@anshulongithub there is a small overlap indeed, but I have no worry about this. |
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Thanks! I agree with @Rocky640 on this. |
There may be more specific ways to increase checking bonuses. This patch is rather generic and probably not optimal.
I use a more concise style than the tests, using
?:instead ofifand adding the total bonus instead of multiple smaller parts.I remove blank lines to group computations of check bitboards with their respective bonuses in a paragraph.