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

1991
Challenge Cube NineSliding block puzzle with playing card suits.
Gerdig UFOSpin the top/bottom half to mix the satellites, then use the central plunger to flip one, two, three or four satellites over.
MastermorphixA higher-order Pyramorphix. A 3x3x3 transformed into the shape of a tetrahedron.

Rubik's Royal Brain Teaser441 piece jigsaw puzzle.
Skewb DiamondMeffert's build-up and truncation of a Skewb into an octahedron.
Tetrahedron (Halpern-Meier-Tetrahedron)Another custom Skewb mod by Tony Fisher with a complicated history.


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