Online since 2002. The most comprehensive site for all around twisty puzzles.
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Oskar van Deventer
RainbowlabacusA small but symmetry-breaking modification of the Astrolabacus.
Real 6x6x6A 6x6x6 which requires the inner 4x4x4 to be solved as well.
Redi CubeA twisty puzzle cube that turns around its corners. A faceless Compy Cube.
Rhomdo TransformerA hybrid puzzle but not in the classical meaning of the word. It takes an awkward axis system and makes it more awkward.
Roadblock CubeConceptually three 2x2x6s fused to one puzzle.
Rob's IcosahedronAn icosahedral variant of Rob's Pyraminx and Rob's Octahedron.
Rob's OctahedronAn octahedral variant of Rob's Pyraminx
Rob's PyraminxA Halpern-Meier-Tetrahedron (aka Jings Pyraminx) without edges.
Rocket StarThe Rocket Twist with a 5-fold symmetry instead of a 3-fold symmetry.
Rocket TwistRocket Twist is the first in a new group of puzzles that do not have core but still jumble.
Rota CubesThree cubes in a tetrahedral case. With every move they not only change position but also orientation.
RotabramThree intersecting circles with gears. Pieces can be exchanged on two are rotated in each turn.
RototributeA shallow-cut variant/tribute to David Pitcher's Rotoprism 2.
Scrambleable CubeA 3x3x3 restricted to sequences of face turn+slice-turn+face turn.
Screw 2x2x2Screw 2x2x2 is a simplified version of the Screw Cube
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