
This puzzle is a variation of the classic Tower
of Hanoi. You can play it on several different levels of difficulty
and with variant sets of rules.
The puzzle begins with a stack of disks in the left hand column as
shown in the insets below. Your object in each puzzle is to transfer
the disks to the righthand column, keeping the same numerical order.
The basic rule is do not place a disk on another disk of smaller
value. Otherwise, shuttle the disks one at a time among the three
columns until you have the proper arrangement in the righthand
column.
Puzzles 1, 2, 3 and 4 (see first diagram below, left) – find the
minimum number of moves to transfer 2, 3, 4 and 5 disks respectively
to the righthand column.
Puzzle 5 (second diagram below) – find the minimum number of moves to
transfer the four disks, observing an additional rule that a disk can
not be placed on another disk of the same color. That means that disk
1 cannot be placed on disk 4. 
