Screw Cube

Buy at Copyright (c) 2012, Alex Polonsky & M. Oskar van Deventer. Screw Cube is an idea by Alex Polonsky. It is basically a 2x2x3 puzzle with eight identical corner pieces that can screw up and down the 1x2x2 base puzzle. As the corner pieces are blocked at the end of the thread after four turns, this makes this puzzle a sort-of Constrained Cube. More info about jumbling: