- Ecutunnel and Ecumillstone. 3d versions of twin-board Ecumenical Chess, with a new front-rank piece. (4x12x4, Cells: 192) By Charles Gilman.
- Tryzantine Chess. A three-handed form of Byzantine (circular) Chess. (4x21, Cells: 84) By Charles Gilman.
|3 'Game' entries listed||1 'Three dimensional' entry listed|
|3 'Circular shaped board' entries listed|
Total items listed: 3