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

Oskar van Deventer
Polaroid CubeA 2x2x2 consisting only of rails. It uses polarizing filters instead of stickers.
Polo CubeA puzzle combining a 2x2x2 with a Sliding-2x2x2 which therefore lacks one cubies.
Polo Gear CubeA 2x2x2 combined with a special move including gears.

Polo GearsCould be viewed as a variant of the Gear Cube. Here the faces (in this case: the knobs) rotate too.
Polo GliderThe concept of "Alex Black Hole" with restricted moves but combined with a 1x2x2.
Polo ShiftIn solved position this puzzle looks like a 2x2x2 with one cubie missing but it is indeed a moving hole puzzle which pieces can be strangely oriented.

Polo SlideA 2x2x2 combined with a moving-hole-puzzle.
Professor RocketThe Rocket Twist with an additional layer on three sides.
Proportional MixupA shape variant of the Mixup Cube. It was designed to have proportional "cubies".

Proportional OhA proportional version of the Oh Cube, which is an earlier design of the same designer.
Pseudo ChopA minimalistic puzzle that uses two different axes but is still doctrinaire.
Quartolabacus A newly-designed Astrolabacus with four channels of beads instead of two.

Quasi TwistA shape variant of Rocket Twist that demonstrates the pentagonal symmetries of every turn.
RainbowlabacusA small but symmetry-breaking modification of the Astrolabacus.
Real 6x6x6A 6x6x6 which requires the inner 4x4x4 to be solved as well.


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