- Mutation Chess. Pieces that capture become the type of piece they captured. (8x8, Cells: 64) Author: Alessandro Castelli. Inventor: John E. Bosley.
- Patrol chess. In order to capture or give check, a piece [including kings] must be `observed' by another piece of the same player. (8x8, Cells: 64) Author: Hans L. Bodlaender. Inventor: Federik Hendrik von Meyenfeldt.
|2 'Game' entries listed||2 'Solitaire game, puzzle or chess problem' entries listed|
Total items listed: 2