Article · Wikipedia archive · Last revised Jun 9, 2026

Triangular chess

Triangular chess refers to a group of chess variants played on boards composed of triangular cells.

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Triangular Chess and Tri-Chess gameboard and starting position source ↗

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 1986.12 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.3

Guide to Ilshat Tagiev's three-player chess (click image for extensive pdf rules tutorial) (in Russian) source ↗

Russian Ilshat Tagiev, who introduced a "neutrality rule" to three-player chess in the mid-2000s,45 took out a patent for a three-person variant of triangular chess on a hexagonal board in 2009.6

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