Make two small conductive contactplate in two corners of each square and put a
resistor in each figure (with 32 different values, for the 32 differen chess
igures), then measure the resistance at each square to determine what figure
stands on a given square.
You can use square bases for the figures and put conductive plates in each
corner of a field square, this way it doesn't mind if somebody rotates his
figure (This has another advantage, you can use chess figures that already
exist and glue them to your square base, this way you can save the effort of
shaping the figures yourself!).

MfG,

Do.Pe.


> Hi!
>
> I am looking for a (wireless) sensor to be located on each of the chess
> pieces in order for a program to know which piece is on any square of a
> chessboard.
>
> I do not want a mechanical sensor. I thought on a sort of radio emitter
> but it has the problem of the small surface of the squares on a
> chessboard. Also there should be a lot of different signals, at least
> one for each type of piece of each color.
>
> The chessboards that do know about the pieces on top of them need a
> starting position to be typed in some manner, then the program just
> remember the movements and knows any time where the pieces are. I would
> like not to type that starting position and also the program to be able
> to detects if the player is cheating.
>
> Any better idea?, any already made chessboard with this features?
>
> Thanks,
> Diego.
>
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