When I first saw a picture of this Vinco Cubetresor (difficulty 7 of 10), I was intrigued, to say the least. When I first got to hold it in my hands, I was fascinated with its pure beauty and superb feel and appearance. It is so well made and the different woods and angles give it an elegant look. There is nothing about how it is put together that gives the slightest hint as to how it might be taken apart. As a matter of fact, it felt so good to hold and twist and turn. I almost thought it would be fun not to be able to take it apart and spoil the mystery. All I could do was to twist, shake, squeeze, push, pull, rotate from every angle possible when my Aha! Moment occurred and it started to open. Just for fun, I’ll tell you there are only 4 pieces. There you go, but it won’t help you open it one bit! When I read the reviews later on, I read that when rotated around, you could hear something move or rattle inside. Mine, however was silent. I guess, from knowing that, the rattle has nothing to do with the solution. Now, mine rattles too. This puzzle was designed and made by Vaclav Obsivac of the Czech Republic. Now that you’ve seen this beautiful puzzle do a search of Vaclav Obsivac and Vin&Co, and wait till you see all the puzzles he has designed and made. His puzzles are not only a puzzling challenge, they are also beautifully constructed and the craftsmanship is unbelievable and really works of art. On the website, you will see how he makes the puzzles and the types of beautiful woods he uses. You will also see that he not only designs and makes these wonderful puzzles, but that he is a skier and a cyclist as well. I’m still trying to figure out the name of this puzzle, what does Cubetresor mean? You can purchase this puzzle at Puzzle Master.