Send custom gameover command to UCI engine at game end

[olivkoch]

This PR allows to retrieve the outcome of a game

[Torom]

What's the benefit of that? Which engines support this, and what do they do with that information?

[olivkoch]

I am building a custom bot with my own ML-based model to play on lichess. I need the games' outcomes to collect stats across games.

[Torom]

Hmm, if there aren't any public UCI engines that use this command (I just googled it and didn't really find anything), then this is more of a change for your fork.

[olivkoch]

Sure. I was submitting just in case this could be of any use to others. Out of curiosity: how come no other engine uses this? Sounds like a fundamental piece of info we'd want to collect.

[Torom]

This is actually cited as one of UCI's shortcomings. But I can't think of any engine that takes previous results into account anyway.

If you're looking for other engine developers or people with ML experience in the context of chess, I recommend the Stockfish Discord.