Ask HN: What did you make during lockdown?
I made an automatic chess board that allows you to play with another person over the Internet (using lichess), but with a physical board. It has been described as "very lockdown chic".Each chess piece has a magnet in the bottom. The board senses your moves by looking at where magnets disappear and appear, and it plays your opponent's moves by dragging them with an electromagnet underneath the board moved by a pair of stepper motors.https://incoherency.co.uk/blog/stories/autopatzer.html