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

Ton Delsing
ClockwiseTwelve moving pieces on a circle with two possible holes.
Color Exchange20 pieces on two separate rings and one moveable plunger.
Digit Rotations20 pieces on two intersecting rings.

Horrible HexagonA sliding piece puzzle with with an internal blockade.
Number CrossTwo intersecting plungers with twelve moveable tiles.
TwinsA moving hole puzzle with only six pieces and one plunger but still very complex.


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