Could you be more specific, please? When I look up the translation of “Mühle,” there are many meanings, all very different from each other. From ‘mill’ to “milling machine.”
What kind of game is it?

Berger

Edit: Oh, ok.... this one?

https://en.wikipedia.org/wiki/Nine_men%27s_morris

I think I remember a Handheld that included this game, but I can't find it. Maybe hap has seen it, since he has emulated many games for Handhelds, such as those with HMCS40 MCU. It may have a different name but be the same game.