Starts with the letter 'O'
- Once More, with Deans. Subvariants of River-with-university-and-cathedral series with extra piece type. By Charles Gilman.
|1 'Game' entry listed||1 'Large board' entry listed|
|1 'Small board' entry listed||1 'Three or more players' entry listed|
|1 'Xiangqi, or Xiangqi-based' entry listed|
Total items listed: 1