Starts with the letter 'O'
- Octogonal Chess. Carrera Chess on an octogon-shaped board. (10x10, Cells: 76) By John Smith.
- Oxybeles Chess. Introducing the exceptional Oxybeles piece, which can hurl pieces over its head, on a Gustavian board (zrf available). By M Winther.
|2 'Game' entries listed||2 'Large board' entries listed|
|2 'Unorthodox shaped board' entries listed||1 'In a category all its own' entry listed|
Total items listed: 2