Gryphon Chess

If you had a Java-capable browser, you could play Gryphon Chess here.
Keys "s"=save "l"=load "b"=back once

Pieces promote upon being moved. A maximum of four rooks, four bishops, and four knights are allowed in play at any time. I take this to mean for each side. Mate any king to win. I ignored en passant. V.R. Parton, 1961. Chess Variants

These are simple illustrations rather than strong opponents.

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Written by Ed Friedlander