TICO Robot Plays Tic-Tac-Toe By Drawing On A Tiny Whiteboard
J'adore ! dans l'esprit de ma lettre au père noël https://blog.encausse.net/2019/12/24/making-of-magic-letter-of-santa/

Tic-tac-toe (or “Noughts and Crosses”) is a game simple enough to implement in any computer system: indeed it’s often used in beginner’s programming courses. A more challenging project, and arguably more interesting and useful, is to make some kind of hardware that can play it in real life. [mircemk] built a simple yet elegant machine that can play tic-tac-toe against a human player in a way that looks quite similar to the way humans play against one another: by drawing.
via Hackaday : lire l’article source