Go learning software "Iki Juku 4" CD-ROM, complete 4-volume set. [Contents] ・Volume 1: Improvement Course + Practice Problems ・Volume 2: Match-style Practice Problem Collection ・Volume 3: Game Software (Sansa) ・Volume 4: Joseki Dictionary The structure allows for systematic learning of courses, problems, games, and joseki, and caters to a wide range of players, from beginners to advanced players. [Supported OS] Windows 10 / 8.1 / 8 / 7 / Vista *CD-ROM compatible PC required. Mac not supported. [Condition] ・Discs: No noticeable scratches (operation not confirmed) ・Cases: Some scratches due to storage ・Please understand that this is a used item. Recommended for those who want to seriously pursue Go learning.