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anton-107 | 4 years ago

Would be interesting to see AlphaZero in this contest, but I don't think it is open source

[1] How AlphaZero Completely CRUSHED Stockfish https://www.youtube.com/watch?v=8dT6CR9_6l4

discuss

sanxchit|4 years ago

Leela Chess Zero is the open source successor of Alpha Zero, and has been the second strongest engine (except a few times where it bested stockfish) for the last few years.

[1] https://lczero.org/

baxyl|4 years ago

That was against an old version of Stockfish. Both Stockfish and Leela are much stronger now than AlphaZero.

civilized|4 years ago

...because they adopted neural network enhancements inspired by AlphaZero, or so I hear.

CydeWeys|4 years ago

And the reason for that is because they haven't been actively developing AlphaZero anymore. It's not worth it to them to spend their limited resources doing so when others in the Chess community are perfectly willing to. DeepMind has meanwhile instead been spending their efforts on solving protein folding, which I think we can all agree is a better use of their limited resources.

jimmytucson|4 years ago

It is. Leela Chess 0 (LC0) won in seasons 15 and 17 in 2019 and 2020.

LC0 is the open source implementation of Alpha Zero’s Monte Carlo tree search + neural nets for static evaluation approach.

Icko|4 years ago

Perhaps someone submitted LeelaZero at some point?

sebzim4500|4 years ago

Yeah Leela even one once in 2019. Since stockfish moved to a hybrid approach (conventional evaluation + neural network) it has been unstoppable though.