This adds nine men's morris or mills (https://en.wikipedia.org/wiki/Nine_men%27s_morris) to the available games for my shadow boardgame lamp.
Print without supports and it should easily come together with a nice fit. Needs the top_cover and led_top from https://www.prusaprinters.org/prints/41610-shadow-boardgame.
The author hasn't provided the model origin yet.