On Piece Recognition Chess Boards

[Terry McCracken]

Piece recognition would be a piece of cake today. You could embed a microchip in each piece which would easily be identified within the boundaries of the chessboard square. The size of the chip is miniscule and can easily fit ... also it is relatively cheap. You could probably sell a kit of RFID microchips that would fit in any chess set ... although the board would need a little more work to identify the boundaries of the chess squares.

already done. DGT uses RFID...

That's correct and Texas Instruments builds the arrays IIRC.