The DaYan Bermuda Cube series is made up of 8 puzzles and they are each named after a different planet. To the average viewer, the Bermuda Cubes might all look the same, but they do have slight differences. This particular puzzle is the Mars variation. It has 3 triangular center pieces which combines fisher cube style faces with regular faces. The triangular center pieces block some moves from being made which adds to the difficulty. Turning the triangular faces by 45 degrees allows you to shape-shift the puzzle.