Jon Steinhart jon at fourwinds.com
Tue May 14 02:26:44 AEST 2019

Rob Pike writes:
> Ken tells me (and I now remember) that the photo in the article was of a
> sort of input device, a board built by Dave Hagelbarger that sensed where
> the pieces were so could digitize moves.
> -rob

My extremely fuzzy recollection is that Dave had an LC tuned circuit in the
base in each chess piece and an antenna coil underneath each square on the


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