New Engine: Avalanche

Questions and comments related to CCRL testing study
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Yinuo Huang
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Re: New Engine: Avalanche

Post by Yinuo Huang »

Hi All,
I am glad to announce the release of Avalanche 1.5.0.
The major experiment with this release is Lazy SMP, which enabled multi-threaded search. It would be great, if possible, if this version can be queued into 4CPU testing. I am curious how much strength 4CPU brings.
Otherwise, the elo gain is approximately 55-70 elo. You can find everything on the release page:
https://github.com/SnowballSH/Avalanche ... tag/v1.5.0

Please take a look and let me know if the Threads option works on your machines (it was a pain debugging thread issues). I only tested it on my only Windows laptop and Windows Subsystem for Linux, but I am pretty confident in Zig's correctness and cross-platformness.

Thank you so much for all the testing and tournaments since the beginning of my journey with this project! :D
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Graham Banks
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Re: New Engine: Avalanche

Post by Graham Banks »

Thanks for the release and your kind words. :thumbup:
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Gabor Szots
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Re: New Engine: Avalanche

Post by Gabor Szots »

I have tried it under Fritz 17 and it seems the Threads option is OK while analyzing a position. I'm not going to play multi CPU games though so I won't be able to tell if it is OK while playing.
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Yinuo Huang
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Re: New Engine: Avalanche

Post by Yinuo Huang »

Sounds good, thanks!
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Yinuo Huang
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Re: New Engine: Avalanche

Post by Yinuo Huang »

Hi all,
A new version of Avalanche was just released (coincidence with like some 7 other engines today lol). v2.0.0 is about 140-180 elo stronger than v1.5.0 in selfplay, but I'm expecting a ~70-90 elo increase on CCRL.
More information here: https://github.com/SnowballSH/Avalanche ... tag/v2.0.0
I'm not sure which CPUs Graham and Gabor use, so please try v4 first, if that crashes, use the v3 binary which should be equivalent to "haswell" in previous releases.

Thanks!
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Gabor Szots
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Re: New Engine: Avalanche

Post by Gabor Szots »

Hi Huang Yinuo,

Noted. :)

Yours is the 10th (!!) new engine version today so I'm not sure when I will have time to test it but it is in my testing queue.
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Yinuo Huang
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Re: New Engine: Avalanche

Post by Yinuo Huang »

Hi all,
I recently released a small search & tuning update, + around 60 elo. Gains a LOT more in 4CPU due to having fixed a memory leaked and some other bugs.
https://github.com/SnowballSH/Avalanche ... tag/v2.1.0
And is possibly the version competing at TCEC Swiss 6.

Thanks for testing!
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Graham Banks
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Re: New Engine: Avalanche

Post by Graham Banks »

:thumbup:
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