Starts with the letter 'Ou'
- Ouk Chatrang (Cambodian Chess) . Part of a document describing various Historical Chess Variants. Author: Nader Daou.
- Outback Chess. New pieces on plus-shaped board. (10x10, Cells: 84) By Timothy R. Newton.
- Outback Chess . New pieces on plus-shaped board. Author: Peter Aronson. Inventor: Timothy R. Newton.
- Outback Chess. Play this game with new pieces on plus-shaped board. Winner of the 84-square contest! Author: Tony Quintanilla and Timothy R. Newton. Inventor: Timothy R. Newton.
- Outer Space Chess. Space-themed game with hyperspace and regular space boards. (5x8x2, Cells: 43) By Nicholas Kuschinski.
- Outpost Chess. Win by occupying a designated square in enemy territory for one move. Author: Ed Friedlander.
- Outrigger Chess. On 10 by 8 board, with several variants. (10x8, Cells: 80) By Ralph Betza.
Total items listed: 7