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Over-and-Under
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Three rings with seventeen marbles each, unconnected but exchangeable.

Over-and-Under is a twisty puzzle with moving marbles. The puzzle was inspired by Chain Puzzle from Devin Montes. However, where Devin's puzzle has only a single viaduct, Over-and-Under has two of them. The puzzle is scrambled by moving the balls and clicking the two halves between their six states. The two parts are held together with magnets: twelve 3 x 3 mm cylinder magnets, and two 5 x 8 mm. The balls (17 per ring) are 10 mm diameter delrin balls.

In 2023 it became available through hknowstore as custom 3D print.
Length: 130 mm
Weight: 92 grams

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