Snake cube

The snake cube is a mechanical puzzle, a chain of 27 or 64 cubelets, connected by an elastic band running through them, creating a specific sequence of straight and bent connections. The cubelets can rotate freely. The aim of the puzzle is to arrange the chain in such a way that they will form a 3×3×3 or 4×4×4 cube. While all commercially available 3×3×3 cubes appear to be identical in terms of the sequence of straight and bent connections, and have only one solution (up to symmetry), at least two different 4×4×4 cubes are sold, both having four unique solutions.

• Unsolved 3×3×3 cube (forming a snake)
• Solved 3×3×3 cube
• Two unsolved 4×4×4 cubes