Four Cubes is Ichiro's follow up to his brilliant Three Cubes puzzle. This puzzle features two pairs of identically shaped pieces, each embedded with magnets similar to the Three Cubes puzzle. The challenge, in this case, is to make four individual cubes, each connected to the neighboring cube with no more than a half-face; so far two such assemblies have been found. A secondary challenge is to find a solution that creates two bars of equal length. Very tricky, and a worthwhile follow up to Thre