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

Proprietary game by David Moeser, 1970.

A similar proprietary game, Hyperchess, by Dr. Ernest Groman and Daniel Jacobson, from the same era, went through two versions with different pawn rules. For now, pawns promote only to queens.

Chess Variants

Meet Ed

These are simple illustrations rather than strong opponents.

Bug reports? -- Thank you! Keep them coming!