Keys "s"=save "l"=load "b"=back once
The queen moves one square diagonally only, except she can jump two diagonally on her first move, but may not capture when jumping. Pawns promote only to queens and may also make the jump on the first move. There is no castling, but the king can leap if he has not been in check. Bare king wins.
Thanks to Tom King for help with the debugging.
Historic Chess Variants
These are simple illustrations rather than strong opponents.
Bug reports? -- Thank you! Keep them coming!