US Patent 10391388 Program, method, and system of transmitting or receiving message

A controller receives a message from a first user terminal of user terminals belonging to a chat group. In a case where the type of the message is of a normal message, the controller transmits the message to each of the user terminals. In a case where the type of the message is selection of the game icon, the controller generates a game message according to logic corresponding to the game icon and transmits the game message to each of the user terminals.