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Update: Jury 1st Prize winner at the 2011 International Puzzle Design competition
Two open-ended Superstrings with the correct spin can be merged into a super-symmetrical cube.
The idea for this puzzle emerged when I was designing shapes based on two interlocked tetrahedra. Inspired by ideas from 'string theory' and 'super-symmetry', I began to search for shapes that were both symmetrical and as similar as possible.
Taking the two pieces apart is not too difficult; reassembling them back into a cube can be more challenging. Hold one of the pieces still; move the other piece through the correct sequence of lateral and rotational moves.
This 3D printed puzzle is one of my most complex and lovely designs.
It takes thirteen steps before the first piece comes free. The 'switch' is flicked at step 5. When reassembling the puzzle, it may be easier to slide the switch piece with a pair of tweezers or a small pointy thing. One of the steps in the solution is a rotation, which makes it harder for computer programs like Burr Tools to find the solution.
This 5 cm hollow version has been optimised to provide maximum puzzle size at minimum cost. It is also ideally suited to being dyed in a variety of colours.
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