The Ultimate Constrained Cube is made from high quality plastic, with each face being a different color. The object of this puzzle is to scramble all 6 faces and then return it so that each face only has one color on it.  Although this cube looks like a normal 3x3x3, it is actually much harder as each face is has different rotational restrictions.  Two of the faces directly across from each other only turn 90° in one direction and then back. Two other faces directly across from each other only rotate 180° in one direction and then back. The last two faces are different from each other, as one is free to move in any direction and the other does not move at all. These limitations significantly limit your ability to move things around, making this puzzle rather hard to solve.
The Ultimate Constrained Cube was designed by TomZ, from Netherland, and is made by Calvin’s Puzzles who is a manufacturer and wholesaler company based out of Hong Kong that started in 2008.

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