Triangular chess refers to a group of chess variants played on boards composed of triangular cells.
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.
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.[1]
Bibliography
. 1994 . David Pritchard (chess player) . The Encyclopedia of Chess Variants . Games & Puzzles Publications . 0-9524142-0-1 .
. 2007 . David Pritchard (chess player) . Beasley . John . The Classified Encyclopedia of Chess Variants . John Beasley . 978-0-9555168-0-1 .