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Leela: Would it be reliable in correspondence chess?

Posted: Wed Oct 10, 2018 1:36 am
by tturgut
1) Correspondence chess: Does anyone have any idea what settings are best for Leela for long analysis?

would it be reliable in cc?

right now, I do not see any evaluation change regardless if it is 2-3 minutes or 2 hour analysis.. this should be related to the parameters I guess. (if it is an evolving tree, it should change with longer analysis)

2) I saw increasing puct number would be better for finding tactics.?Does anyone have anyexperience?

3) Endings: Syzygy does not work well with this engine for some reason. (it works, but...)

4) openings: alpha zero recommended English. Leela likes french, KI. any other opening recommendations? (it looks like locked centers mainly?)

Re: Leela: Would it be reliable in correspondence chess?

Posted: Wed Oct 10, 2018 2:55 am
by dkappe
I wasn’t too excited about lc0 multipv. It’s very easy for a single move to dominate the visits.

I added a random root mod to my bender fork of lc0. After an initial 4000 iterations of search, it explores random root moves 1/16th of the time, then random root moves proportional to Q 3/16ths of the time. Set the cpuct to 5, and you have much better multipv.

https://github.com/dkappe/lc0/tree/bender
https://github.com/dkappe/leela-chess-w ... iki/Bender

Re: Leela: Would it be reliable in correspondence chess?

Posted: Wed Oct 10, 2018 2:58 am
by dkappe
Sorry, the point being that it yields better, more useful results for analysis (and it may play a bit better than vanilla lc0).

Re: Leela: Would it be reliable in correspondence chess?

Posted: Wed Oct 10, 2018 3:01 am
by Nay Lin Tun
https://www.chess.com/forum/view/genera ... e-on-leela


For unlimited search/ visit "-v 10000000000000" in engine parameter.

Re: Leela: Would it be reliable in correspondence chess?

Posted: Wed Oct 10, 2018 5:04 am
by tturgut
Thanks. My computer /software skills are limited. (I was able to set it up, but that's it)

Can you clarify a little more?

1) "For unlimited search/ visit "-v 10000000000000" in engine parameter."
exactly which engine parameter? (I am using CB13)

2) "Set the cpuct to 5, and you have much better multipv."
I guess this increases the tree width, (catching more tactical shots), but decreases the depth. is this correct?
Then, would something higher than 5 be better?

3) weights: shall i just leave it as it is? (autodiscover)
I put 11248 in the same folder as lc0.

4) syzygy: I wrote
-s c:\TB
is this correct?

5) engine number: doesn't this matter at all? 2,4,6.... anything is OK?

thx!

Re: Leela: Would it be reliable in correspondence chess?

Posted: Wed Oct 10, 2018 7:06 am
by dkappe
Cpuct to 5 with the random root mod.

Re: Leela: Would it be reliable in correspondence chess?

Posted: Wed Oct 10, 2018 7:22 am
by George Tsavdaris
Nay Lin Tun wrote:
Wed Oct 10, 2018 3:01 am
https://www.chess.com/forum/view/genera ... e-on-leela


For unlimited search/ visit "-v 10000000000000" in engine parameter.
Unless he uses a GUI to analyze, as most probably does, so this is not needed as he just presses ANALYZE in the GUI and let it run as long as he wants. :D

Re: Leela: Would it be reliable in correspondence chess?

Posted: Wed Oct 10, 2018 7:38 am
by crem
George Tsavdaris wrote:
Wed Oct 10, 2018 7:22 am
Nay Lin Tun wrote:
Wed Oct 10, 2018 3:01 am
https://www.chess.com/forum/view/genera ... e-on-leela


For unlimited search/ visit "-v 10000000000000" in engine parameter.
Unless he uses a GUI to analyze, as most probably does, so this is not needed as he just presses ANALYZE in the GUI and let it run as long as he wants. :D
There's actually no "-v" parameter. It was in LCZero (v0.10), but in Lc0 (v0.15 and further) it's not there.

Re: Leela: Would it be reliable in correspondence chess?

Posted: Thu Oct 11, 2018 10:41 am
by tturgut
http://talkchess.com/forum3/viewtopic.php?f=2&t=68623

I wasn't sure if i should add this discussion at this topic . 2 problems:
1) crashing, better now with the new driver.
2) 2070 may be enough. (2080 does not change evaluations after a minute or so) so 2070 may just be good enough if it runs just a little longer.