- Chess Jester. 4-player variant with two new pieces. Author: Matthew P. Scholle and David A. Mahan. Inventor: David A. Mahan.
- Doubles Chess. Four player chess variant on octagonal board. (Cells: 128) Author: Hans L. Bodlaender. Inventor: Rick Gillespie and Henry Rolling.
- Doubles Chess Partnership Ltd . Website of company selling four player chess variant. (Cells: 128)
- Imperial Chess I. Four-player game on circular board, also called Chez. Author: Ed Friedlander. Inventor: Donald irvin Gebhart.
|3 'Game' entries listed||1 'Java Program' entry listed|
|1 'Play by mail item' entry listed||1 'Large board' entry listed|
|3 'Three or more players' entries listed||1 'Circular shaped board' entry listed|
|5 'Sold commercially' entries listed|
Total items listed: 5