Items Invented by Ronald Drinning
- Deployment. The initial setup of the pieces is open but hidden from the other player. (8x8, Cells: 64) By Ronald Drinning.
- Dice Chess. Die roll determines which type of piece is moved. By Ronald Drinning.
- Double Moves. Move your opponent's pieces after moving your own. Author: Fergus Duniho. Inventor: Ronald Drinning.
- Fortress. Each player has an extra piece off board which cannot be captured or moved. By Ronald Drinning.
- Terrain Chess. Roll dice to create impassable squares. (8x8, Cells: 64) By Ronald Drinning.
- Terrain Chess. Blocking pieces are placed randomly on the board. By Ronald Drinning.