- Chess with Different Armies. A Ralph Betza personal favorite: Features series of armies with approximately the same strength as the FIDE army. (Recognized!) Author: David Howe and Fergus Duniho. Inventor: Ralph Betza.
- Mad Chess (Steel=White). Chess variant with unequal armies on 10 by 10 board. Author: Fergus Duniho.
- Mad Chess (Stone=White). Chess variant with unequal armies on 10 by 10 board. Author: Fergus Duniho.
|3 'Play by mail item' entries listed||2 'Large board' entries listed|
|3 'Each player has a different army' entries listed|
Total items listed: 3