The best known is a chess variant for two players, Triangular Chess, invented by George R. Dekle, Sr. in 1986. Dekle made another variation including fairy pieces which is called Tri-Chess. These two two-player games were included in World Game Review No. 10 edited by Michael Keller.[page needed][non-primary source needed]
Russian Ilshat Tagiev, who introduced a "neutrality rule" to three-player chess in the mid-2000s, took out a patent for a three-person variant of triangular chess on a hexagonal board in 2009.
- Interesting Engineering (2017). "Three Player Chess is Just as Crazy As it Sounds". InterestingEngineering.com. Retrieved 25 November 2018. Cited in: .
- Keller, Michael, ed. (June 1991). "A Panorama of Chess Variants". World Game Review. No. 10. Michael Keller. ISSN 1041-0546.
- Pritchard, D. B. (1994). The Encyclopedia of Chess Variants. Games & Puzzles Publications. ISBN 0-9524142-0-1.
- Pritchard, D. B. (2007). Beasley, John (ed.). The Classified Encyclopedia of Chess Variants. John Beasley. ISBN 978-0-9555168-0-1.
- Sohail, Umer (2016). "Three Player Chess Is Now A Reality". WonderfulEngineering.com. Retrieved 25 November 2018.