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Sunrise Sunset
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A triangular dipyramid with shallow slices at all five vertices. Three of these allow 90�-turns.

Sunrise Sunset is a shallow cut vertex-turning triangular dipyramid. It turns on axes at all five vertices, two of which turn in increments of 120 degrees, and the other three in increments of 90 degrees.
These 90�-turns make the puzzle interesting because the group of the triangular prism (which the solid obeys) seems to not allow moves like this but these moves are there and the puzzles neither changes its shape nor was fudging needed for implementing it.
It is a relatively simple puzzle to solve, particularly in comparison to the deeper-cut bandaged Fracture-6 and unbandaged Constellation Six puzzles, despite having two additional axes.

The puzzle has 6407704188813312000 = 6.4*10^18 permutations.
Compared with the number available if the puzzle can be disassembled and reassembled there are these restrictions:
-The first eigth edges determine the orientation of the ninth.
-The fourfold tips, edges, wings have to have permutations with the same parity.

Edge length: (long edges) 90 mm
Edge length (short edges): 62 mm
Weight: 32 grams

In 2017 Jason Gavril remade the puzzle with a number of different body colours, including a version which glows in the dark. See images 7-10.



Thank you to the following people for their assistance in helping collect the information on this page: David Pitcher, Andreas Nortmann.


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