Rashkey 2Second of a series of three similar puzzles. The three differ only by the colours of the pieces.
Rashkey 3Third of a series of three similar puzzles. The three differ only by the colours of the pieces.
Rhombille Rex IIIThree intersecting circles, one of sixth order and two of third order.
RigelTwo intersecting circles but with two concentric circles of pieces per half.
Rigel2A direct successor of Rigel from the same designer.
Rigel3A direct successor of Rigel from the same designer.
RokettoThree intersecting circles allowing turns in 180° and sometimes 36°.
RotaPlusThe Rotascope with the central piece unbandaged.
Roto 36Four circles. One with 120°-steps, three with 60°-steps.
Roto 44Four circles in square configuration with a fifth in the center.
RotoidFour intersecting circles making up an enhanced version of the Rotascope.
Rotoid PlusFour intersecting circles making up an enhanced version of the Rotascope, with two pieces split up further.
RotosEast german puzzle of overlapping disks.
SadalmelikSix circles which allow turns of 180�.
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