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 o…
How does it handle moves where pieces might accidentally hit each other like https://en.wikipedia.org/wiki/Castling and knight moves?
There is usually enough space between two chess pieces to easily fit a third one between them on these boards. So from my understanding the magnet just moves the third piece from between the two other pieces without hitting either of them.