>In the mid-1970s, Ernő Rubik worked at the Department of Interior Design at the Academy of Applied Arts and Crafts in Budapest.(19) Although it is widely reported that the Cube was built as a teaching tool to help his students understand 3D objects, his actual purpose was solving the structural problem of moving the parts independently without the entire mechanism falling apart.

>He did not realise that he had created a puzzle until the first time he scrambled his new Cube and then tried to restore it.(20) Rubik applied for a patent in Hungary for his "Magic Cube" (Hungarian: bűvös kocka) on 30 January 1975,(4) and HU170062 was granted later that year.

>@jagarikin: ルービックキューブを円に変換することでわかりやすくすることに成功いたしました https://t.co/0jygbuSYbX