Simple chess variant from early 20th century on 45 degrees turned board. By Karen Robinson. Citadel chess . A variant of Shatranj, played on a ten by ten board with four extra citadels. Choice Chess .
Opponents selects one of five proposed moves.
Clairvoyant Chess . Players predict what opponent will do to gain advantages. By Jim Aikin. Clash of Command . Chesslike game with pieces that change and leave behind other pieces on special board.