3D SUDOKU puzzle

This is a 3D Model of a solved SUDOKU puzzle. The object is a piece of Minimal Art. This is how it works:
- solve a SUDOKU puzzle
- replace each of the 81 squares by a cubelet
- bring each cubelet to a level according to the sign in the square it belongs to
If you try this with a random SUDOKU you have a change of one in a million that all 81 cubelets are connected to each order. Yet there are a lot connected SUDOKUs. We found them for you. They are rare and multiple at the same time.
We added a frame to give the object more strength and stiffness.