There are two approaches to this puzzle, neither of which are in any way easy to find. It is very difficult to unravel due to the bonds that hold this structure together. Another elegant cast puzzle from Hanayama

Quartet Puzzle -- Level 6True bonds are hard to form, yet they are eternal. Inventor Mine Uyematsu has designed a cast metal brainteaser puzzle whose bond is truly difficult to unravel. Consider how to go about forming and breaking such a bond. There are two approaches to this puzzle -- are you good enough to find them both? University Games was founded by Bob Moog and Cris Lehman, who recognized a developing niche in social interaction and learning games for adults and children.