Starts with the letter 'O'
- Oblique . Variant with board with 40 squares turned 45 degrees. By Tony Quintanilla.
- Oblong Chess 44 . Missing description By Erez Schatz.
- The One Ring . White wants to get the Ring to the far side and destroy it. By Robert Price.
|3 'Zillions of Games file' entries listed||3 'Small board' entries listed|
|1 'From ancient times' entry listed||1 'Each player has a different army' entry listed|
Total items listed: 3