Online since 2002. The most comprehensive site for all around twisty puzzles.
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Dmitry Andreev
Rotascope (transparent with blue digits)A customized Rotascope with blue digits on the transparent tiles.
Rotascope - CustomizedThree customized Rotascopes with themes based on the other hobbies of the customer.
Rotascope - EscherFour customized Rotascope with themes based on famous works of M.C. Escher.
Rotascope - Escher IICustomized Rotascope with a theme based on famous works of M.C. Escher. This time with a non-circular body.
Russian RingsTwo intersecting rings of moving marbles plus two intersecting circles.
SadalmelikSix circles which allow turns of 180�.
ShaulaThree intersecting circles each with three steps and with different distances between the centers. All that with a doctrinaire puzzle.
Shaula 2An unbandaged version of Shaula.
SheliakThree intersecting circles and one plunger moving half of the puzzle in steps of one and two.
Sheliak÷3Three intersecting circles split horizontally by three plungers.
SheratanTwo intersecting circles. The smaller one turning in steps of 180°, the larger turning in steps of 120°. The circles intersect extremely deeply.
SiriusTwo intersecting circles with 147 pieces, named after the brightest binary star system on the sky.
Sirius2Sirius with one piece type less than the first version.
SpicaTwo intersecting circle turning by 45°, without jumbling.
SualocinTwo intersecting circles turning in steps of 120° and 180°.
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