Showing posts with label rubik's cube. Show all posts
Showing posts with label rubik's cube. Show all posts

Thursday, April 5, 2007

Rubik's cube news

Got an email from Gene Cooperman (CS Prof at Northeastern) a few days ago saying that he and some colleagues have shown that 26 moves (in the face-turn metric) suffice to solve Rubik's cube (the previous best upper bound is 27; lower bound is 20 - the superflip position). They used 7 terabytes of distributed disk space (I gotta get me one of those machines) and will be presenting their research at ISSAC-07.