Hash is an interlocking puzzle based on the design Croissillon Type B8 by Yavuz Demirhan. That design has four long identical pieces woven through each other.Has is the same design, but then squashed flat and skewed in two direction. The resulting puzzle has the same intermediate difficulty and 24-move solution, but now all four pieces are different. The name Hash refers to the hash character (#) to which it resembles. Nowadays, the hash symbol is mostly used for hash tags.
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