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

You are White. Each side must protect one pawn and one other piece secretly assigned to be royal, in addition to the king. Your royal pawn does not promote. Black balls mark units known by the opponent not to be royal. Ralph Betza, 1978.

Chess Variants

These are simple illustrations rather than strong opponents.

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

Written by Ed Friedlander