Starts with the letter 'Twi'
- Twin-board Ecumenical Chess. Ecumenical Chess with extra Pawns, on two FIDE boards joined together on one or more edges. (Cells: 128) By Charles Gilman.
|1 'Game' entry listed||1 'Large board' entry listed|
|1 'Circular shaped board' entry listed|
Total items listed: 1