Online since 2002. The most comprehensive site for all around twisty puzzles.

3x3x3
RCP CentroidA 3x3x3 in the shape of four intersecting cylinders.
Real kite cubeA 3x3x3 truncated on two sides into a prism with a kite-shape as base.
Red Bump BallA 3x3x3 in shape of a sphere. In addition the core was moved away from the shapes center.

Relativity CubeA picture-variant of the 3x3x3. The images were adapted from one of M. C. Eschers most famous works.
Relativity Cube (2x2x2)A picture-variant of the 2x2x2. The images were adapted from one of M. C. Eschers most famous works. The same was already adapted to a 3x3x3.
Religious Objects Puzzle CubeContains numerous Jewish holiday symbols.

Reptile CubeA 3x3x3 stickered with images taken from six different reptile skins.
Reptilian CubeAnother piece fo cubeart This time a fantastic retile is depicted.
Respect CubeA sticker pattern for the 3x3x3 that poses a nice combinatorial problem to solve it.

Reuleaux Leaf TetrahedronA tetrahedral 3x3x3 without one half of the corners.
Reuleaux Mastermorphix (aka Master Pyramorphinx)A 3x3x3 in shape of a Reuleaux tetrahedron.
Rhino JoggingThis cheap knock-off is slightly larger than a Rubik's Cube and features a cartoon rhinocerous.

Rhombic Dodecahedron 3x3x3A 3x3x3 with the namegiving shape which is a catalan solid.
Rhombic Dodecahedron in CubeA rhombic dodecahedral 3x3x3 (a truncated puzzle) extended to be a cube with tips. Clear resin was used for the extensions.
Rhombic PrismInvented and built by Tony Fisher in 1989.


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