To transfer and rebuild the tower around one of the initially empty pegs such that:

- only one ring be moved at a time
- no ring must rest on a smaller ring

**2^n -1** gives the value of the number of turns where **n** = number of rings

To transfer and rebuild the tower around one of the initially empty pegs such that:

- only one ring be moved at a time
- no ring must rest on a smaller ring

**2^n -1** gives the value of the number of turns where **n** = number of rings