Games Invented by Alfred Pfeiffer
- CheGo. Drop chess pieces on the board to control the largest number of squares. (8x8, Cells: 64) By Alfred Pfeiffer.
- Chess on a board with 37 squares. Game with full Chess arrays minus a Pawn on a 37 square board without any corners. (Cells: 37) Author: Alfred Pfeiffer and Hans L. Bodlaender. Inventor: Alfred Pfeiffer.
- Chess99. Large progressive chess variant, where pieces gain progressive capabilities as the game develops. (9x11, Cells: 99) By Alfred Pfeiffer.
- ChessNim. Drop chess pieces and reduce the number of unattacked squares on the board. (8x8, Cells: 64) By Alfred Pfeiffer.