Online since 2002. Over 3300 puzzles, 2600 worldwide members, and 270,000 messages.

Carl N. Hoff
Bubbloid112A cornerturning cuboid designed to be a puzzle with a multi-origin-core. The second implementation of this concept.
Bubbloid122A Compy Cube redesigned to be a puzzle with a multi-origin-core.
Doctor CubeA Mixup Cube reduced to the slice moves.

Doctor SkewbA slices-turn-only Mixup Master Skewb. It has 4 possible twists with steps of 30° each.
Double Circle Real 5x5x5The Real 5x5x5 => A 5x5x5 with a 3x3x3 inside and twistable.
Evil DoppelgängerA special subvariant of the Multi Gear Cube Kit closely related to the Gear Cube Extreme.

Mercury Uniaxial 3x3x3A slight modification of the Deep Uniaxial 3x3x3.
Multi Gear Cube KitA generalized version of the Paso Doble. It allows all kinds of gearing ratios between opposite sides for all three axis.
Neptune DoDep 3x3x3The result of a three year old idea. Although it looks like a 5x5x5 there are only two cuts possible for each axis.

Thorny CubeA Circle Mixup Cube.

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