Twiddler - Quad-RadicalFour intersecting circles. Comes with an additional pieces to determine the solved configuration.
Twiddler - Tri-PlexedThree intersecting circles. Comes with an additional pieces to determine the solved configuration.
Twin RingsTwo circles rotating in steps of 90° with an intersection smaller than the radius of the circles.
VertushkaA puzzle with intersecting circles. To connect the parts together, an elastic band is used.
Vertushka-2 A handmade 2D-puzzle with rotaging circles.
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