The Colorbound Clobberers versus The Fabulous FIDEs . A variant with unequal armies by Ralph Betza. Combat Chess II . A wargame like variant. Combination Chess .
Pieces give their movement capabilities to friendly pieces in their zone of influence.
The Complexity of Large Chess Variants . Information on theoretical computer science results for large chess variants. By Eli Bachmutsky. Compromise Chess . Opponent selects one from two proposed moves.