Ten Billion Barrel Puzzle

thingiverse

The Ten Billion Barrel puzzle, also referred to as the Nintendo tumbler puzzle, is a mathematical challenge similar in style to Rubik's Cube. It features a six-tiered cylinder made of black plastic and an encasing frame consisting of upper and lower discs connected through the center of the cylinder. The top and bottom levels form one piece, while between them are two rotatable sections each comprising two tiers. Each of the central levels is divided into five chambers, housing a colored ball. In contrast, the top and bottom levels contain three compartments, accommodating either three balls or parts of the frame depending on their relative positions. By adjusting the frame's height in relation to the transparent cylinder, users can move the balls within three out of the five resulting columns up or down a level. The objective is to arrange four balls of the same color in each column, with the black balls occupying the tops of the longer ones. [Source: Wikipedia & Jaap's Puzzle Page] To print this puzzle, you will require two center rings, two end rings, one center rod, one end cap, and one end cap with a rod. Additionally, choose your preferred color for five sets of four balls, along with three black balls. The printing specifications include 0.1mm layers, a printing speed of 60mm/s, and two shells. Depending on the capabilities of your printer, you might need to print the center rod with supports (50% is sufficient).