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

Intersecting circles
SemiCollideFive circle of different sizes, all of which rotate by 90°.
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.

SheratanTwo intersecting circles. The smaller one turning in steps of 180°, the larger turning in steps of 120°. The circles intersect extremely deeply.
Side ViewMechanically this is a simple puzzle with four intersecting circles. Innovative is the fact that one can only see the side of the pieces which is still enough to solve it.
SiriusTwo intersecting circles with 147 pieces, named after the brightest binary star system on the sky.

Sirius 3The Sirius implemented anew with a third circle.
Sirius2Sirius with one piece type less than the first version.
Soviet WhirligigA variant of the Whirligig of soviet origin.

SpicaTwo intersecting circle turning by 45°, without jumbling.
Starry SkyA gigantic ring in the middle and ten circles cut up in a hexagonal pattern.
SualocinTwo intersecting circles turning in steps of 120° and 180°.

Suhail 5Two intersecting circles with steps of 72� and 60� and different radiuses.
Suhail 6Two intersecting circles with steps of 60� each but with different radiuses.
Super GeraniumThe enhanced version of Geranium with five additional circles.


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