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A rotational-gravity puzzles based on a cubic structure.
This puzzle is based on the Cubedron Classic puzzle concept. The puzzle consists of a slightly tinted plastic sphere with five black pyramids inside, which form a cube with one pyramid missing. The puzzle is solved when the colors at the base of each side of a pyramid match the color at the base of the sides of the pyramids adjacent to it. There are four colors (red, yellow, blue, green) and exactly two solutions.
To flip a pyramid, ensure the empty space is always at the top, then move one pyramid towards the empty space, and so on. This type of movement is a natural movement, when one pyramid rotates with respect to the center of the sphere, while the position of the other pyramids is invariant.
A combination of systematic approaches is required to find one of the two solutions. There are some unexpected mathematical problems involving parity and rotations. But to switch from one solution to the other (the two solutions are not mathematically connected), a dexterity move ("D-move") is required. The D-move is a 90 degrees rotation of the pyramid with respect to its own axis. In speed-solving competitions, the solver is required to start from one solution and to end up to the other, a task which involves mathematical thinking as well as balancing skills.
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