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Intersecting circles
Super LooperThree circles on one line, each allowing 180 turns with deeper intersections.
Takenoscope 23A Rotascope implemented completely different.
TaygetaThree intersecting circles with one 8-fold rotation and two non-infinite fivefold rotation.

TetrakiumFour circles intersecting each other like the Rashkey.
Three Moons (Triple Lotica)Four circles forming a puzzle that works like a larger version of Lotica.
TolimanThree intersecting circles that are differently sized and allow different rotations.

Tricky TrianglesSeven intersecting circles with six segments.
TricleThree intersecting circles with visible orientation.
TrioSimilar to the Puzzler from Douglas Engel but with 3 circles.

TritiumThree circles intersecting each other like the Rashkey.
TRIvial circlesA 2D puzzle with two overlapping circles that share one of their 3 leaves.
Try-AngleA puzzle of four intersecting circles inspired by the fidget spinner.

Turn FourAn enhanced but simultanuously reduced version of Rashkey.
Turn Push - AEGA version of Lotica advertising the former german company AEG
Turn Stile - basic versionA moving tiles puzzle with two intersecting circles.

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