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

Oskar van Deventer
Hinged Gift CubeA variant of Oskar van Deventer's original Gift Cube with hinges.
Hinged Treasure ChestA mass produced Treasure Chest with four pieces replaced. The result resembles the Hinged Gift Cube without being identical.
Hollow 2x2x2A 2x2x2 made mostly of air.

Hollow CubeA 3x3x3 made mostly out of air.
Hollow Diamond (Plug&Play)A minimal twist with extending pieces which can be clipped into the hollow pieces.
Hollow MysteryA simplified version of Rocket Twist with all the same strange properties.

Hollow PyramidThe concept of the Hollow Cube transferred to the Pyraminx but with a newly designed mechanism.
Hollow SkewbA Skewb as radically reduced as possible.
Hollow Skewb (Plug&Play)A minimal twist with extending pieces which can be clipped into the hollow pieces.

IcosaixA face turning icosahedron. Not the first one but the first to reveal the jumbling geometry of this type of puzzles.
Illegal CubeA pentagonal prism which ignores geometric rules.
Impossible TwistA deeper-than-origin puzzle inspired by the impossible dovetail object.

Incomprehensible CubeA physical implementation of (UD', L, Ls, Fs). A 3x3x3 with a coupled pair of edges and two opposing sides coupled.
InfinilabacusThree channels with extremely strong bends.
InvertiminxA megaminx, reduced to three sides, was turned inside-out.


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