ideas:
1 a prince piece that moves up, down, upleft, or downright but not left, right, upright, or downleft.
2 princess moves all ways prince can't and can't move any way prince can
3 power ups: can make a piece exept a king do these: invincible for 5 moves x1.
can make a piece have to be taken twice to be eliminated x5.
Actually, there is already a piece that acts as both Q and Kn it's called the Amazon.