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A puzzle with two circles and a plunger which can exchange pieces between the circles. The circles are split in segments of eight.
This puzzle was inspired by Douglas Engel's puzzle series "Slide rule", especially by the versions "Pie 3" and "Pie 6".
The inventor made a series of five puzzles that all use the same principle but different numbers of slices.
Every variant has two sides. One side is a super version, where every segment must be in a particular place. On the other side is an easier version, where some segments can change places.
Material: Acrylic, screws and vinyl stickers.
Size: 100 x 160 mm (without plunger)
In TetraPie the one and a halve circles are split into twelve segments. Numbers on one side ensure unique positions for every piece.
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