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Lucasoato • today at 7:05 PM • 1 reply • view on HN

Will it make illegal moves? I have doubts regarding this, at least for the strongest models like Opus5.5 or Astra.


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jeremyjh • today at 7:11 PM

Absolutely it will. You have to run them in an environment without tools because today they just turn on stockfish if you ask on claude.ai.

These models are strong at math and coding because they have been heavily trained for it in post-training. That is where a majority of the gains have come from in the past two years. That has absolutely no impact on chess ability. Heavily train a deep learning model for chess and you get Leela, an absolutely monster. Don't train them for chess and I doubt its even 1200.

It is possible to do post-training on a base LLM and get a strength equivalent to a strong amateur but people haven't done that at any meaningful scale recently, so hard to say what the ceiling might be with the largest models. Probably pretty high but it would be expensive and still worse than Leela.

The only interesting question is could it explain chess to you - and I haven't seen evidence that it can. ChessGPT at least - while purportedly 1800 strength, can't explain strategic themes from the first chapter of beginner strategy books accurately or explain why specific moves are bad (positionally), it just knows they are.

https://github.com/waterhorse1/ChessGPT

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