Last year, a couple of fellas at Northeastern University with a bit of spare time on their hands proved that any configuration of a Rubik’s cube could be solved in a maximum of 26 moves.

Now Tomas Rokicki, a Stanford-trained mathematician, has gone one better. He’s shown that there are no configurations that can be solved in 26 moves, thereby lowering the limit to 25.

Full article here.

## Thursday, March 27, 2008

## Thursday, March 13, 2008

### Slabacus (Slide Rule & Abacus Simulator)

The slide rule & abacus simulators teach you how to use these two tools.

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