Stems from an ancient Indian legend of educational toys. When Brahma created the world's big three diamond pillars done in a post from the bottom up in order of size pile of 64 gold discs. Brahman Brahma command to start the disc from below in order of size again placed on another pillar. And regulations, can not zoom in on a small disc disc, one can only move one disk between the three pillars.
Come try it.