Games Invented by Philip M. Cohen
- Nemesis Chess. Some pawns are replaced by the Nemesis, which moves only toward the enemy king and cannot be captured by pawns or kings. Author: Ben M Reiniger. Inventor: Philip M. Cohen.
- Null chess. Capture squares are destroyed when vacated. Author: Ben M Reiniger. Inventor: Philip M. Cohen.
- Tutti-Frutti Chess. With bishop-knight, knight-rook, queen-knight and the usual pieces on an 8 by 8 board. (8x8, Cells: 64) Author: Hans L. Bodlaender. Inventor: Ralph Betza and Philip M. Cohen.