Starts with the letter 'Twi'
- Twin Orthodox Chess. Two kings on a 10x10 board. Author: Ed Friedlander. Inventor: Vernon Rylands Parton.
- 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 'Java Program' entry listed|
|2 'Large board' entries listed||1 'Circular shaped board' entry listed|
Total items listed: 2