Product description This famous mathematical wooden brain teaser puzzle used in math lessons at school and management tests. The 9 Rings version requires 511 moves! It is 4 times as difficult as the 7 ring version All the pieces can be stored inside the box for safe keeping. Starting with all 9 discs placed on the central stand. The goal is to transfer all the discs one to the other stands in their original order. You may move just one disc at a time, and a larger piece cannot be placed over a smaller one. Can you do it? Safety Warning choking_hazard_small_parts
Trustpilot
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