Alex Black Hole is based on a sliding-cube idea by Alex Polonsky. There are seven cubes around a sphere with grooves. The object is to scramble the puzzle by sliding the cubes, and then solve the puzzle.
Watch the YouTube video
http://www.youtube.com/watch?v=1-5xxR0vayw
Read at the Shapeways Forum
http://www.shapeways.com/forum/index.php?t=msg&th=3464
Read more at the Twisty Puzzles Forum
http://twistypuzzles.com/forum/viewtopic.php?f=15&t=18911
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