Items Invented by Ivan Derzhanski
- Cardmate. Chess variant on board with 100 squares, inspired by card games. (10x10, Cells: 100) By Ivan Derzhanski.
- Hexabeast. Hexagonal chess variant with six animal pieces, by Ivan A. Derzhanski. (Cells: 70) By Ivan Derzhanski.
- Xhetrast. A conservative Contrast version of Xhess. (10x10, Cells: 100) By Ivan Derzhanski.
- Cardmate . Chess variant on board with 100 squares, inspired by card games. By Ivan Derzhanski.