4Set Logic is a much more challenging reasoning game than 3Set Logic designed for two players by adding a “4th set” to the game screen. A device can be shared or two games locally connected. Players alternate turns using the coloured selection wheel to take one or more pieces from a remaining set. The sets change to reflect the remaining pieces. A player loses when forced to take the last piece on the screen, and the winning player’s score increases by 1. The game pieces are reset after a winner is declared. Players can use their own name and use “Settings” to select a different game pieces. Each player can have their own game pieces when playing on separate devices. Scores are reset when “Start Over” is selected.