GearboxFive cog wheels on one axis turned with different step widths every turn.
Hex ShiftFourteen gears on a hexagonal shape.
Shift HappensSix unequal gears separable aand rotatable in groups of three.
Spherigear LoopEight spherical gears of which four are turned at any time in conjunction. The very rare case of an abelian twistypuzzle.
SpherigearsA combination of a mechanical maze and Bramboules.
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