Hanayama Padlock – Level 5
This puzzle looks like a regular padlock, but actually consists of four different parts. Two elliptical parts that are so tightly locked around the other two circular parts that it seems impossible to separate them. But don’t give up! This is a puzzle that you can try to separate and put together several times to master. The theme of this puzzle is “obstinacy”. Made by the Korean designer JinHoo Ahn.