Chekker Math (1974)

"Each player has a set of chips numbered 2-9 which start in the circles bordering the edge of the grid. Each grid square has a pair of numbers, each shown twice so as to be easily read by all players. Played most like Chinese Checkers, the twist in Chekker Math is that a playing piece must be a factor of at least one number on each square on which it lands. Thus, only a player's 2, 3, 4, 5, 6 and 8 chips may be played on the square showing "30" and "64". The 7 and 9 chips may not be played on that square. "