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

Intersecting circles
Kaleidoscope-4Four circles of tiles with two centres.
Kamennyi TsvetokSix intersecting circles (in steps of 120) in a 2D-puzzle of soviet origin.
Kangoeroe PuzzlerA newly colored version of the classic Puzzler.

Kvadratura KrugaA puzzle from the soviet era. Its title translates to "Squaring the circle"
Leonidas Doble CrazyFour intersecting circles with five rings and four different possible turns.
LooperThree circles on one line, each allowing 180 turns with a shallow intersections.

LoticaThe original Lotica without images on the pieces.
Mad TriadTen overlapping wheels. Each with six segments.
Magic DigitFour intersecting circles with just seven pieces visible out of twelve pieces in total, with an additional flipping mechanism for the pieces.

Magic Disc (aka Brain Teaser)Four intersecting circles
Magic Disc (aka Brain Teaser) IIFour intersecting circles with a different cutting depth.
Magical GearsA puzzle with two intersecting circles. Produced in low quantity in four different variants.

MandorlaTwo circles with 120 moves.
Marbleous CirclesA reimplemented Whirligig-9 but solved by shape instead of colours.
Master TRIvial circlesA custom redesigned version of the Puzzler with an unseen colour scheme.


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