'Split' 1x2x3

pinshape

This is a 6-sided cube, where the top and bottom layers have been sliced in half, allowing for effortless 90-degree turns as well as smooth 180-degree turns on those layers. This clever design makes the puzzle behave like a unique 2x4 cube bandaged along the middle layer in two places, thus making it significantly more challenging than a standard 1x2x3 or even a typical 2x2x3 for that matter.