Similar to crobots (http://en.wikipedia.org/wiki/Crobots).
Because it feels like there's some space for i) Something that can run on RPi for youth to learn programming and ii) a bi-monthly competition for HN, with rankings (most victories, smallest code with at least one win etc).
https://news.ycombinator.com/item?id=4726828
Exactly a year ago! (And no progress at all on that github repository!)