A system, method, and non-transitory medium employ a user computer including an input/output device for providing a graphical user interface (GUI) to the user; and a game server, interacting with the user computer, for displaying game screens on the GUI to conduct a game with representations of two two-sided cards having a pair of sides hidden from the user; wherein display of the hidden pair of sides of the two two-sided cards to the user by the game server determines a winning state.