Items Invented by Oliver Xymoron
- Mage Chess. Queen can swap with any friendly unit. Author: Ed Friedlander. Inventor: Oliver Xymoron.
- Mage Chess II. Queen can swap with any friendly or enemy unit. Author: Ed Friedlander. Inventor: Oliver Xymoron.
- Mage. Rooks cannot be captured or capture, and the Queen is replaced by a Mage. Author: Peter Aronson. Inventor: Oliver Xymoron.