This wenge and maple puzzle consists of four boxes inside a partitioned cage. (One of these four boxes has been removed for your viewing pleasure.) There are mazes on each of the elongated sides of each box; the removal of any box requires using controls on the top, left, right, and bottom of the cage to enable the boxes to shift forward and backward within the cage, essentially "solving" the mazes. Since each box's position is affected by the position of the box or boxes neighboring it, this is a maddening undertaking. The difficulty level of the puzzle can be modified by choosing how mazes face each other inside the cage. Nick Baxter named this box The Beast because the number of possible initial settings was originally thought to be 666. Subsequent calculations conclusively settled that the number of settings is 538.