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A two-dimensional, deeper-than-origin, shallower-than-corner doctrinaire twisty puzzle. Or two intersecting circles with 2-fold or 5-fold rotation.
Moonshine (a.k.a Weird Disk 2 times -5) is an example of a two-dimensional, deeper-than-origin, shallower-than-corner doctrinaire twisty puzzle. Check the Twisty Puzzle Forum for the meaning of these terms. This circle puzzle has two types of turns. One turn is a 2-fold rotation of the circle at the right. The other turn is a deeper-than-origin rotation of the whole outer flower in steps of 72 degrees, while the inner part remain stationary.
It may have been Evgeniy Gregoriev who first discovered examples of this class of "shallower-than-corner" (in a not yet implemented puzzle "Sphere Un35 v2"). Moonshine is a flat version, and possibly the least complex member of this class. The name of this puzzle is because it features crescent shapes.
Dmitry Andreev (a.k.a. Pluton) made a nice extended version in acrylic called Castor. Please refer to the separate entry.
In 2020 a mass produced version "Moonshine" hit the market.
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