Calvin Puzzles
Calvin's Puzzles Constrained 90
This puzzle has a specially designed mechanism that allows each face of the cube to turn only 90 degrees to one side. It is the hardest to solve in the series of constrained cubes.
This puzzle has a specially designed mechanism that allows each face of the cube to turn only 90 degrees to one side. It is the hardest to solve in the series of constrained cubes.