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

Stefan Pochmann
Super 4x4x4A sticker variant of the 4x4x4. Compared with the traditional stickering scheme the face pieces are distinguishable.
Super 5x5x5The 5x5x5 super group cube. Unlike the standard 5x5x5, each of the nine center cubies on each face has only one solved position and one solved orientation.

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