Starts with the letter 'r'
- Raumschach. "... (German for Space Chess) is one of the first three-dimensional chess variants and the first to survive until present". Author: Jeremy Gabriel Good. Inventor: Dr. Ferdinand Maack.
- Raumschach (rules enforcing). Play Raumschach on Game Courier, with rules enforced. Author: Ben M Reiniger. Inventor: Dr. Ferdinand Maack.
- Ravioli Chess. Chess on two boards squeezed together at the edges. By Antoine Fourrière.
|3 'Play by mail item' entries listed||3 'Three dimensional' entries listed|
|2 'From ancient times' entries listed|
Total items listed: 3