This is Tower of Hanoi.

Below is a tower of rings. The aim of the game is to move the entire tower to one of the empty spaces. Rings can be moved (one-by-one) from the top of the tower; the only rule is that a ring can not be placed on a smaller ring.

To move a ring, click the tower it is currently in, then click the tower you want it to go to. You can only ever move the top ring from a tower.