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

Dmitry Andreev
Duplex 2Two intersecting circles of which one can be twisted.
Duplex 3Two circles of marbles that would not intersect if it weren't for the twist of the Duplex puzzles.
Fifteen in circlesThree intersecting circles with fifteen pieces and one hole.

ForamenCombines two intersecting circles with one plunger.
FormalhautTwo circles with different degree of rotation in a puzzle that is still doctrinaire.
GacruxTwo intersecting circles with eightfold turns but not in steps of 45. A jumbling-only puzzle.

HadarThree intersecting circles that return with steps of 2, 5 and 6 but still being doctrinaire.
Irregular Puzzler 1.0Two intersecting circles with irregular angles between steps.
Irregular Puzzler 2.0Two intersecting circles with irregular angles between steps.

MatrioshkaThree intersecting circles with one embedded in another.
Matrioshka 2Two intersecting circles with three possible turns.
MimosaTwo intersecting circles that return with steps of 2 and 5 with very deep intersectins beyond the centres of the circles.

MintakaTwo circles intersecting in a doctrinaire fashion with four steps each and with vastly different radii.
MiraThree intersecting circles, two are 5-fold, one is 2-fold.
MizarFour circles of which two could form a doctrinaire puzzle despite a fivefold rotation.


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