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RotabramThree intersecting circles with gears. Pieces can be exchanged on two are rotated in each turn.
Roto CrystalRotoCrystal is an 18 sided analog of the Fracture-10 puzzle, based on the hexagonal dipyramid.
RotoPrism 2A modified shape with a lower-order slice pattern for the Fracture-6.
RotoPrism 2 (prismatic)RotoPrism 2 (prismatic) is a lower-order shape modification of the Fracture-6 puzzle.
RotoPrism 2 PeekabooA "see-through" variant of RotoPrism 2.
RotoPrism 3 (flat)A modified shape for the Fracture-6 puzzle.
RotoPrism 3 (round)A modified shape for the Fracture-6 puzzle.
RotoskewbAn offset Skewb with the mechanism of the Gear Pyraminx
Rotoskewb IIThe successor of Rotoskewb implements the true concept the original idea giver had in mind.
RototributeA shallow-cut variant/tribute to David Pitcher's Rotoprism 2.
Rounded MadnessMore Madness with different cuts and therefore one additional piece type.
Royal IcosamateA corner turning icosahedron with four cuts per axis.
Royal OctahedronNot the first puzzle with the axis system of a corner turning cube and five logical layers. But it is the first one in shape of an octahedron.
Royal PentultimateA face turning dodecahedron with 4 cuts per axis all very close to the puzzle's center.
Royal SkewbA corner turning hexahedron with four cuts per axis. Despite the other puzzles with these properties the cuts are placed closer to the core.
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