John Lewis wrote on Thu, Aug 2, 2007 01:48 PM UTC:
I. Number of Squares (Traditional)
* Unknown starting board size.
V. Piece Types:
* Different pieces per side.
X. Games with Drops
* Captured pieces can be dropped or some starting pieces can be dropped
XV. Confined King
* As in Chinese Chess
XX. Incomplete knowledge
* Hidden pieces, pieces can only see where they can move?
XXI. Winning Conditions other than mate.
* Players can move any pieces and attempt to capture a rogue piece?