CT800 V1.32 released

[Ras]

Hi,

I have released V1.32 of the CT800 engine. The most important improvement for the UCI version is that also results from an incomplete final depth iteration can be evaluated, which gave around +30 Elo in self play.

Web link: https://www.ct800.net/software.htm

regards, Rasmus

[Graham Banks]

Thanks.

[Gabor Szots]

Thanks Rasmus.

I have recently tested v1.31 and it scored worse than 1.11 and v1.30 (see here: http://www.computerchess.org.uk/ccrl/40 ... +opponents). I hope I can confirm your prediction of v1.32 being significantly stronger.

[Ras]

I have recently tested v1.31 and it scored worse than 1.11 and v1.30

Thanks for testing! However, that's strange because the functional change from 1.30 to 1.31 is stalemate recognition in KQ:K, which is needed in drawn KQ:KP games with bishop or rook pawn. Both are quite rare endgames anyway, and the fix was just cosmetic. Other than that, GCC got an update from 6.4.0 to 7.3.0. And some code reformatting and stuff, but that doesn't change functionality.

I'm astonished how 1.11 can be that far up anyway because in my testing, it's consistently weaker. I think it's statistic variation and depends a lot on the openings that the test framework rolls out. For example, the engine can't really deal with Dutch as Black. The internal book works around this, but in CCRL, "ownbook" is usually set to false.

[Sergio Martinez]

Thank you Rasmus