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A Square-1 transformed into the shape of an icosahedron. Compared with Greenhill's icosahedron it is slightly "axised"
For this puzzle a Square-1 was transformed into the shape of an icosahedron which is one of the five platonic solids. Such a shape transformation was made for the first time by Anthony Greenhill but in his variant the main axis of the Square-1 goes through two opposing corners of the icosahedron.
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Thank you to the following people for their assistance in helping collect the information on this page: Andreas Nortmann.
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