Meffert's Twisty Puzzle: Molecube

Meffert's Molecube is the perfect blend of two brainteasing phenomena: Rubik's Cube and Sodoku.  Check out this 3-dimensional Sodoku-like twisty puzzle.  Contrary to the Rubik's cube objective of having all like-colors on the same face, twist the Meffert's Molecube puzzle so that each of the nine colors appear on all sides.

Difficulty: 4.5/5