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Another case of twistypuzzle extremism. A proof-of-concept how far a mechanism can be driven.
From the solving point of view the 1x2x9 poses no additional challenge compared with the 1x2x3. The 1x2x9 can be solved as if one solves four 1x2x3s in one row. The challenge here was whether the mechanism (which is similar to the original 1x2x3 can support such a cuboid.
Although the design was presented by the creator in 2010 the first sample was shown to the public in January 2012.
Thank you to the following people for their assistance in helping collect the information on this page: Andreas Nortmann.
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