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

Rhombi GemA face turning rhombic dodecahedron with only with jumbling turns.
Rhombic dodecahedron MultidodecahedronThe Multidodecahedron in shape of a rhombic dodecahedron.
Rhombic raptor skewbA rhombic dodecahedron with three cuts per axis through 3-fold corners and two cuts per axis through 4-fold corners.

Rhombic SpartacusA hybrid of Pentultimate and Radiolarian 3 in the shape of a Rhombic Dodecahedron
Rhombic Tuttminx F2Rhombic Tuttminx F1 with totally different cutting depths.
RhombiCeltic PlusThe Edge Turning Rhombic Dodecahedron with an additional type of cuts.

Rhomdo CometThe shape and axis system of the Rhomdo reduced to the simplest possible puzzle.
Rhomdo CopterThe Rhomdo Comet in shape of a cube.
Risas FractureA fractured variant of the Jumble Trap

RODIA shape and sticker variant of a Bump Cube modelled to implement Schrödinger's cat. It can be alive and dead.
Rolling Bead Wheel & Spinner PuzzleA moving hole puzzle with four layers and eight columns plus a spinner puzzle.
Rotat Magic Bean Intelligence IOn of two variants of Back spin. This one has 29 marbles.

Rotat Magic Bean Intelligence IIOn of two variants of Back spin. This one has 23 marbles.
Rubik's CaptureA 14x14 grid of coloured squares among which 2-4 players have to find certain patterns.
Rubik's Roll27 coloured dice in a collection of 5 non-solitaire games.

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