Disentanglement - Hemispheres

Hemispheres
Designer:Bernhard Wiezorke
Craftsman:Jean-Claude Constantin
Category:Disentanglement

The seemingly impossible objective is to change the orientation of the hemispheres so that a ball hangs below the red bead. When solved, the puzzle will appear exactly as in the photograph except for the hemispheres. This is a difficult puzzle with a most elegant and surprising solution.