Search found 318 matches

by brianr
Thu Feb 28, 2019 3:11 pm
Forum: Computer Chess Club: General Topics
Topic: Is AlphaZero-LC0 (Leela0) A chess Engine?
Replies: 31
Views: 3282

Re: Is AlphaZero-LC0 (Leela0) A chess Engine?

There is far more art and science (and exhaustive testing) in creating and improving a mere "bean counter" engine than you might think (SF for example). As far as developing a plan, this has eluded 50+ years of chess programming until recently. Unfortunately, while the trained nets have a "plan", we...
by brianr
Thu Feb 28, 2019 3:06 pm
Forum: Computer Chess Club: General Topics
Topic: Leela network 40+ 50 quetsion
Replies: 1
Views: 267

Re: Leela network 40+ 50 quetsion

The so-called "self play" Elo cannot be compared between different net architectures and sizes (because they never play each other). Of course you can play 30 v 40 heads up or against a common set of opponents. Net 50 is one of the smaller nets (only 10 layers IIRC) so it is currently far less deman...
by brianr
Thu Feb 28, 2019 1:15 pm
Forum: Computer Chess Club: General Topics
Topic: How to find your Leela Ratio - for Windows users w/ GPU(s)
Replies: 15
Views: 1439

Re: How to find your Leela Ratio - for Windows users w/ GPU(s)

I stressed what I wanted to say because I often use very short time controls, similar to those in Fishtest testing framework, often one needs many games. The so called effective "Leela Ratio" is different by a factor of 2 or more going from say 15''+0.25'' to 240''+4'', and maybe a factor of 3 or m...
by brianr
Tue Feb 26, 2019 10:03 pm
Forum: Computer Chess Club: General Topics
Topic: Arena website down >= 48 hrs
Replies: 36
Views: 4275

Re: Arena website down >= 48 hrs

I like Winboard/Xboard and cutechess-cli.
I use Arena for "test driving" and engine and for analysis, but not for tourneys.
by brianr
Fri Feb 22, 2019 5:42 pm
Forum: Computer Chess Club: General Topics
Topic: GPU rumors - AMD Navi and Nvidia GTX 1160
Replies: 7
Views: 1007

Re: GPU rumors - AMD Navi and Nvidia GTX 1160

As long as Lc0 isn't using Tensor Cores for anything else than FP16 operation, these cards could still be a good option. It was mentioned on the Leela Discord that cudnn backend does not support the type of fp16 on this card yet: "ankan Today at 11:43 AM TU116 GPU doesn't have tensor cores, but it ...
by brianr
Fri Feb 22, 2019 2:31 am
Forum: Computer Chess Club: General Topics
Topic: Which EGTB files to download
Replies: 4
Views: 579

Re: Which EGTB files to download

Arena can use Gaviota TB's for adjudication. This is handy if you enjoy engine vs. engine matches. Houdini 1.5a -- the only free Houdini -- supports Gaviota only. The Nalimov TB's are still used by some engines, e.g. Hiarcs and Crafty. So I suggest getting them all. If that's not an option, go with...
by brianr
Tue Feb 19, 2019 10:07 pm
Forum: Computer Chess Club: General Topics
Topic: LCZero Network question
Replies: 7
Views: 890

Re: LCZero Network question

Eduard wrote:
Tue Feb 19, 2019 12:02 pm
But I am surprised about the depth. Distilled network 11258 after 5 minutes only in depth 10/24, w36088 in depth 13/32! How can that be? :roll:
Depth for Leela is an artificial estimate and not really like a/b engines.
by brianr
Sun Feb 17, 2019 5:38 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: A0 subtlety
Replies: 29
Views: 3718

Re: A0 subtlety

I am more and more convinced the problem with supervised learning is not being able to forget week games. There is a whole lot of literature on “experience replay” in deep reinforcement learning that solves the problem of overfitting to early/latest data. What I need to do is sort the games by Elo,...
by brianr
Sat Feb 16, 2019 11:03 pm
Forum: Computer Chess Club: General Topics
Topic: End of Era is there: SF is finally beaten!
Replies: 118
Views: 16580

Re: End of Era is there: SF is finally beaten!

http://www.computerchess.org.uk/ccrl/4040/cgi/engine_details.cgi?match_length=30&each_game=1&print=Details&each_game=1&eng=Lc0%200.20.1%20w36089%2064-bit#Lc0_0_20_1_w36089_64-bit The CPU version is improving rapidly too. Just looking to confirm that this is Leela on only one CPU (the BLAS backend I...