DuplexAn intersecting circle puzzle, but with a twist!
Duplex 2Two intersecting circles of which one can be twisted.
EightTwo intersecting circles similar to the Lotica but of different size.
Eight PlusThree intersecting circles turning in steps of four, two and eight.
EliacTwo intersecting circles similar to the Lotica.
Elite-2The shortened variant of Elite-3.
Elite-3Three intersecting circles with eight segments on two but still being a doctrinaire puzzle.
ElucidateFour circles, two of them concentric and turning in steps of 180°, the others turning in steps of 90°.
Euclidean 2Two circles with 90�-turns in an immensely complex puzzle.
Euclidean 3Three circles with 90°-turns in an immensely complex puzzle.
EvoCopterA bandaged "Face of Infinity 7th Circle", and unbandaged PlanarCopter and an unbandaged BiCopter.
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