Lc0 v0.32.0 (Dev)

Discussion of anything and everything relating to chess playing software and machines.

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jcgdijkstra
Posts: 21
Joined: Wed Jul 11, 2012 8:39 pm
Location: Deventer, The Netherlands

Re: Lc0 v0.32.0 (Dev)

Post by jcgdijkstra »

Stephen Ham wrote: Thu Jun 19, 2025 8:26 pm
jcgdijkstra wrote: Thu Jun 19, 2025 7:02 pm
Stephen Ham wrote: Wed Jun 18, 2025 12:42 am Hi Jason,

I tried to run your Leela 32.0 development, but received an "exception" - the engine won't work.

I have Windows 10x64 and a NVIDIA GeForce RTX 2080 Ti with 65,462MB. Is that incompatible with your Leela?

-Steve-
Hi Steve,

A little off topic but I noticed you have the same GPU as I do. I have been competeting LC0 against Stockfish for years and find that, with various networks tried, it's about as a strong as SF13. However, I find no improvements in it's strength of play weather I play LC0 on my RTX 2080 TI or my previous GTX 1050 TI. Naturally, I get more NPS but in game performance it hardly makes a difference. May I ask what is your preferred network for your GPU in terms of strength?

Tnx,
John

Hi John,

I'm able to use the BT4-spsa-1740 NN.

As a ICCF GM, I analyze potions over relatively longer periods of time. I generally perceive Leela as at least as good as SF, which seems primarily coded for speed chess and standard time-controls. Nonetheless, in positions with complex tactical solutions and endgames, alpha-beta coded engines remain superior.

-Steve-
Thanks Steve. I will try that network. Indeed, while strategically very impressive, I have seen networks blunder tactically even though their increased depth of analysis should have covered it.
Stephen Ham
Posts: 2503
Joined: Wed Mar 08, 2006 9:40 pm
Location: Eden Prairie, Minnesota
Full name: Stephen Ham

Re: Lc0 v0.32.0 (Dev)

Post by Stephen Ham »

trippytreez445 wrote: Wed Jun 18, 2025 10:16 pm
Stephen Ham wrote: Wed Jun 18, 2025 12:42 am Hi Jason,

I tried to run your Leela 32.0 development, but received an "exception" - the engine won't work.

I have Windows 10x64 and a NVIDIA GeForce RTX 2080 Ti with 65,462MB. Is that incompatible with your Leela?

-Steve-


Hi Steve,

The version you tried was built for the RTX 40 series (compute capability 8.9). I’ve now built a new version targeting the RTX 20 series (compute capability 7.5) for you, hopefully it will fix the error you’ve been getting. Keep in mind this version is untested and actually crashed on my system with an RTX 4070.

You can download it here:
https://www.mediafire.com/file/ibnkzhts ... 0.zip/file

Please try it out and let me know how it goes. Also, let me know what errors you’re getting if any.

Best,
Jason
Hi Jason,

Thank you VERY much for your kind modification. I'll try it tomorrow.

All the best,
-Steve-