Please come and watch the puzzle prototypes that I have designed and built, like my Guinness World Record 17x17x17 "Rubik's" Cube or the Gear Cube. And try to answer the questions that I post at the end of each video.
These so-called "Turkish puzzle rings" are multiple-band rings that are linked together. Once scrambled, it is quite a puzzle to get the ring back together again. These are modern puzzle ring designs by Bram Cohen and prototyped by Oskar van Deventer.