NA Chinese String Puzzle Children\'s Toys/unhooking Unlocking Intelligence Burr Puzzle/Traditional Brain Teaser, Classical Metal Chinese 9 Serial Puzzles with Instructions

Nine rings, also known as China ring, may be the biggest mechanical puzzle in China.For a long time, mathematicians and computer scientists have analyzed that this puzzle consists of a ring handle interlocked with nine rings.The goal is to remove all nine rings from the loop. The solution requires 341 steps, so it requires a lot of patience.But there is a way to solve the problem-once you learn to solve the problem, it is hard to forget!Applicable gender: NeutralCategory: UnloopApplicable age group: UniversalProduct size 8.5 x 2.9 x 0.8 inches