Towers of Hanoi (up to 9 rings!)

thingiverse

The Tower Challenge is a timeless puzzle that demands precise moves to shift all disks to the opposite side of the board, starting from the largest at the bottom. My miniature setup, measuring 10cm x 3.5cm x 3cm, comes with 9 interlocking rings that can be customized based on desired difficulty. To play, begin by arranging disks in ascending order from widest to narrowest. The goal is to transfer them to the opposing pin while adhering to these simple rules: move one piece at a time onto any available pins, never place a larger disk on top of a smaller one, and avoid forming unstable stacks. Interestingly, the minimum number of moves needed for n disks follows this formula: (2^n) - 1. With 9 rings, achieving the solution in fewer than 511 moves is impossible. When printing or assembling, feel free to contribute photos to our community's 'Made' section – we love seeing your creations! If you decide to print it, please note that model optimization for better quality involves settings like raft-less print, support-free build plate, and optimal infill density. Upon completing the Tower Challenge, fine-tune the model using gentle sanding where necessary, particularly focusing on the pillars, as stray strands of plastic might have formed between the disks during printing. The extent of this depends on your specific 3D printer model. My own Tower Challenge was crafted with vibrant Yellow ABS on a DaVinci 1.0 and requires fine-tuning post-print.