Each player places a playing piece on the same picture on each board. The goal is to place four playing pieces in a line across, up, down or on a diagonal on one board. Easy to play, challenging to master for all ages. By having to play on two boards at once, a good move on one may not be a good move on the other. Includes additional game board design for added fun and challenge. Based on the algebraic principles and mathematical theory of games. Try it. You'll like it.