Triangular Chess Triangular Chess Triangular Chess is a chess variant for two players invented by George R. Dekle, Sr. in 1986. The game is played on a hexagon-shaped gameboard comprising 96 triangular cells. Each player commands a full set of chess pieces in addition to three extra pawns and a "unicorn". Triangular Chess and its variation Tri-Chess were included in "World Game Review" No. 10 edited by Michael Keller. The starting setup is as shown. As in chess, White moves first and the object is checkmate. Other standard conventions apply as well, including castling, a pawn's initial two-step option, "en passant", and
Chess with different armies rook replacement to c1. This is so colorbound pieces don't change square color. Many pieces in the following armies are combination of standard chess pieces and 4 fairy pieces: "ferz", "alfil", "wazir" and "dabbaba" (see their movement diagrams above). The game can be played with standard chess pieces and the following move diagrams use standard pieces as well (except queens). In this army, rooks, knights, bishops, and queen are replaced by the following pieces: As mentioned, when using this army and castling queenside, the king moves "three" squares (from e1 to b1) and the bede moves from a1 to c1.