Circular chess of the board and a different starting setup. In the citadel game, if a king reaches the citadel, a draw is forced. The starting position is essentially obtained from that of orthodox chess by cutting the board in half and bending the two halves to join at the ends. Two lines are marked on opposite sides of the board, and each set of pieces is positioned so as to straddle this line. The king and queen start on the innermost ring, with, as is the case in square chess, the queen on a square of the same colour; the bishops
Kung-Fu Chess Chess contained six different game types: in addition to the four existed in Shizmoo's Kung-Fu Chess, also included Fast Standard, and Four-Way Crazyhouse. On May 27, 2014 Tempest was discontinued by its owner. In 2010 a game similar to Kung Fu Chess dubbed "Ninja Chess" has been developed for iPhone and iPad. It is published on the App Store by Nordlysa Entertainment, but has been abandoned by the creator and is currently unavailable from the Store. This project brings the concept of Real-Time Chess to touch interfaces and includes the ability to play Head-to-Head (each player facing his own board).