Items Invented by William Overington
- Herb garden chess. Variant on 7 by 12 board with additional combination pieces. (12x7, Cells: 84) By William Overington.
- Tree garden chess. Large chess variant on 10 by 10 board with 4 by 4 area missing from the middle. (10x10, Cells: 84) By William Overington.
- Tree Garden Chess. Zebras, camels, cardinals, marshalls negotiate around a central lacuna. Author: Jeremy Gabriel Good. Inventor: William Overington.
- Herb Garden Chess . Variant on 7 by 12 board with additional combination pieces. Author: Peter Aronson. Inventor: William Overington.
- Tree garden chess . Large chess variant on 10 by 10 board with 4 by 4 area missing from the middle. Author: Mark Thompson. Inventor: William Overington.