If you had a Java-capable browser, you could play Ten-by-Ten Cheshire Cat Chess here. Keys "s"=save "l"=load "b"=back once
V R Parton, 1970. When a unit leaves a square, that square vanishes. The king's first move is as a queen.
Cheshire Cat Chess
Chess Variants
Meet Ed
These are simple illustrations rather than strong opponents.
Bug reports? -- Thank you! Keep them coming!