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

Intersecting rings
3ringsThree intersecting rings that do not form circles.
Arancia MeccanicaA moving bead puzzle with seven colors of beads, and a base that resembles an orange.
Balled BallA combination of a 2x2x2 with three rings of thirteen marbles.

Beaded BallA spherical 2x2x2 with six rings of marbles. Unlike Vergo's Cube the rings are place closer to the center.
Digit Rotations20 pieces on two intersecting rings.
DoppelkreisA derivate of the hungarian rings with less marbles in only two colors. It resembles the original patent from 1893!

Double DiskA puzzle with four rotating intersecting circles.
Game 7Six numbered pieces in two intersecting rings.
Golovolomka-8A derivate of the Hungarian Rings from the soviet era.

Hog Wild Double Think Binary RingTwist, slide and rotate puzzle pieces.
Inside Track 3Five intersecting circles with two types of pieces.
Kosmicheski OrbityTwo intersecting rings of marbles but with four junctions at which the pieces can change between the rings.

Leesho (1 layer)One layer and one orthogonal ring of moving tiles.
Leesho (2 layers)Two layers and one orthogonal ring of moving tiles.
Leesho (3 layers)Three layers and one orthogonal ring of moving tiles.

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