Very strange opening behavior of the pretrained nets

[tosca07]

Hello,

first of all thank you for this very interesting followup project of maia1.

At the moment I try to add a UCI wrapper to your inference code in order to be able to play giants maia2 in a chess gui (like our picochess project ;-) by just selecting the predicted move with the highest probability.

both pretrained nets (rapid and blitz) do have a very strange opening behavior: They often move their knights back and forth (Nf6, Ng8, Nf6 etc.) without developing any of their own pieces or moving a pawn:

White (human): e4
Black (maia2): Nf6
White: d4
Black: Ng8
White: Nf3
Black: Nf6
White: Bc4
Black: Ng8

Could this be a bug (I can't imagine that lots of lichens games exactly did this so often!?)?

Do I have to change some parameters (I got this behavior for different ELO levels).

Or is it because the nets do need more training?

Are there any bigger (Better!?) nets for maia2 somewhere I could test with?

Anyway - thank you so much for your work!

Thanks
Dirk

[tosca07]

I found out that this issue already has been addressed/answered in #4 Closed: "Only do Nf3 Ng1 (in loop) with white and Nf6 Ng8 with black"

Essentially the current pretrained nets have not been trained with opening or end game moves.

Would be cool if we could get nets trained with these game moves as well.

Thanks
Dirk

[sargon2]

The version of Maia on the https://www.maiachess.com/ website is maia2, correct? Howcome this odd behavior isn't exhibited there?