Every move, you may move an enemy piece to an unattacked square. Players may move pieces of themselves or of their opponent. By Hans Bodlaender. G H I Interchange Chess . Invented by David Howe, Fergus Duniho, and Alexandre Muniz.
All pieces are the same color.
Players move pieces on their side of the board. By Andrew Looney. N O One or two . Make a normal move, or denote two pieces for which your opponent chooses how they must be moved. By Ralph Betza.