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

Six-Sided: Cuboid
Slim 2x3x3A 2x3x3 whichs height is less than one fourth of its width.
Slim 3x3x4The cuboidal cousin of the Slim Cube.
Slim 3x3x5A flat 3x3x5, based on a Russian domino.

Slim 3x3x6A 3x3x6 cuboid with less height than width.
Slim Bump Cube (Mirror Blocks)A slim bump created by cutting down the tallest layer to equal the thinnest layer of a 3x3x3 mirror blocks puzzle.
Slim CubeA 3x3x3 forced into the dimensions of a Floppy cube and thereby changing its solving properties.

Slim fisher cubeA Fisher cube truncated on two opposing sides.
Slim Horror CubeSlim "Horror" Bump Cube (Mirror Blocks) has two layers of equal but unproportional size.
Spalt CubeA 2x2x4 turned into a pattern and redesigned into something akin a bandaged 2x4x4.

Spalt Cube FisherThe Fishered variant of the Spalt Cube.
Special 2x2x3Looks like a 2x2x3 but it is an enhanced hexagonal prism.
Specter CubeA fully functional 3x4x4 built by Mr. Watanabe and presented by Mr. Okamoto

Spin BlockA Fidget Spinner pretending to be a Floppy cube but it is just a 1x1x3.
Split 1x2x3 IIA 1x2x3 where the corners are split up by two planes.
Split 1x2x3 IIIA 1x2x3 with split edges. The concept of Square-1 turned upside down.

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