Wild Chess 9

If you had a Java-capable browser, you could play Wild Chess 9 here.
Keys "s"=save "l"=load "b"=back once

Royalty passes between king and guard, whichever is first if you go a1 to a8, then b1 to b8, and so forth. I allow castling if and only if the original king has always been the royal one.

Play it here.

Chess Variants

Meet Ed

These are simple illustrations rather than strong opponents.

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