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

Crazy Puzzle (other)
Super 2x2x4A mass produced 2x2x4 transformed into a crazy (aka circle) puzzle.
Super 3x3x4-01 Cuboid CubeA 3x3x6 with two layers reduced to circles. One of them linked to the surrounding pieces.
Super 3x3x5 I Cuboid CubeA 3x3x6 with one layer reduced to a circle, unlinked to the surrounding pieces and with the core shifted by half a cubie.

Super 3x3x5 II Cuboid CubeA 3x3x6 with one layer reduced to a circle, linked to the surrounding pieces and with the core shifted by half a cubie.
Super 3x3x5-00 Cuboid CubeA 3x3x7 with two layers reduced to circles, non-linked to the surrounding pieces and with a core offset half a cubie.
Super 3x3x5-01 Cuboid CubeA 3x3x7 with two layers reduced to circles, one linked to the surrounding pieces, the other not and with a core offset half a cubie.

Super 3x3x6-00 Cuboid CubeA 3x3x8 with two layers reduced to circles.
Super 3x3x6-01 Cuboid CubeA 3x3x8 with two layers reduced to circles, one of them linked to the surrounding pieces.
Super 3x3x7 I Cuboid CubeA 3x3x8 with one layer reduced to a circle, unlinked to the surrounding pieces and with the core shifted by half a cubie.

Super 3x3x7 II Cuboid CubeA 3x3x8 with one layer reduced to a circle, linked to the surrounding pieces and with the core shifted by half a cubie.
Triangular Circle Floppy PrismThe triangular cousin of the Circle Floppy
True Crazy 2x3x3A proportional 2x3x3 with circles on all sides.

Verrückter DrachenA crazy octahedron with extensions to give it the shape of a deltoidal icositetrahedron which is a catalan solid.
WillFool 3x3x3A combination of a Crazy 2x3x3 and a 3x3x5.

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