> But I remain amazed that OP does not report any illegal moves made any of by LLMs.
They did (but not enough detail to know how much of an impact it had):
> For the open models I manually generated the set of legal moves and then used grammars to constrain the models, so they always generated legal moves. Since OpenAI is lame and doesn’t support full grammars, for the closed (OpenAI) models I tried generating up to 10 times and if it still couldn’t come up with a legal move, I just chose one randomly.
They did (but not enough detail to know how much of an impact it had):
> For the open models I manually generated the set of legal moves and then used grammars to constrain the models, so they always generated legal moves. Since OpenAI is lame and doesn’t support full grammars, for the closed (OpenAI) models I tried generating up to 10 times and if it still couldn’t come up with a legal move, I just chose one randomly.