The Legend. In an ancient city in India, so the legend goes, monks in a temple have to move a pile of 64 sacred disks from one location to another. The disks are fragile; only one can be carried at a time. A disk may not be placed on top of a smaller, less valuable disk. And, there is only one other location in the temple besides the original and destination locations sacred enough that a pile of disks can be placed there.

Website: http://www.math.toronto.edu/mathnet/games/towers.html