Keys "s"=save "l"=load "b"=back once
Actually this is "Chez", by Donald Gebhart, 1970. I did not understand the rules for its variant, "Imperial Chess I".
The army vanishes when king is captured. Last player surviving is the winner. You must escape check if you can. For now I have all promotions to Queen.
These are simple illustrations rather than strong opponents.
Bug reports? -- Thank you! Keep them coming!