Hanoi Tower Keychain

This is a mini version of the well known Hanoi Tower puzzle, to fit your backpack or purse and to play everwhere you want.

There are only 3 rules for playing this:

1) Your goal is to move the tower completely to another pin.
2) You can move only one disk at a time.
3) You cannot put a larger disk on the top of a smaller one.

The minimum number of movements is given by (2^n) - 1, where n is the number of disks used. So if you are using 3 disks, the minimum number of movements is (2^3)-1 = 7. For 7 disks, this minimum is (2^7)-1 = 127.

Enjoy!