Online Chess With Physical Pieces On a Chessboard
D4C5CE writes "A chess-playing German tinkerer has contrived (and made a video of) an amazing contraption that plugs real chess pieces into the freechess.org server using a 20W LED projector and an old webcam to read moves on a projected chessboard."
I built something like that 5 years ago using magnets and reed switches.
FUCKING MAGNETS??? HOW DO THEY WORK???