This is "Ginsei Igo 18," a Go (囲碁) software for playing games, officially recognized by the Nihon Ki-in (Japan Go Association), and equipped with a Go AI engine. It supports up to the level of amateur top rank/8-dan certificate, making it suitable for practical game practice. [Condition] ・CD disc included ・Case included ・User registration postcard included ※ Due to being a used item, we cannot guarantee user registration or support. [Supported OS] Windows 7 / 8.1 / 10 [Notes] Please confirm the operating environment and installation method. We recommend purchase for those familiar with PC operation. Please purchase only if you understand that this is a used item. [Regarding the outer box] Due to shipping costs, the outer box will either not be sent or will be folded and included. If you are concerned about the condition of the outer box, please refrain from purchasing.