Now there is an even more difficult version of the popular Shipper's Dilemma- the Advanced Z. This puzzle is one of the top five most difficult puzzles we sell.

There are 17 pieces to this puzzle, with each piece shaped like a blocky"Z". Your assignment is to pack them all into a perfect cube that will fit within the base and cover of the box. Only master packers will be able to solve this one. Originally called Conway’s Packing Box, it was developed by a Cambridge University Mathematician who said it is nearly impossible to do by randomly trying to fit the pieces. The solution requires intense analytical skills. Mathematicians and engineers will love it. It includes a brilliant step by step presentation of the analytical process required to solve this puzzle by Mike Czerwinski.