Controls

You play by moving disks between the three pegs. Click a peg (or tap it on a phone) to lift its top disk, then click or tap another peg to drop the disk there. There's no dragging on either device. Only the top disk of any peg can be moved.

One rule defines the entire puzzle:

• Moving a disk takes the top disk from one peg and places it on another. You can only ever move one disk at a time.
• The size rule forbids placing a larger disk onto a smaller one. This single restriction is what makes the puzzle a puzzle.

You solve it by rebuilding the entire tower, in order, on a different peg. Undo reverses your last move if you tap the wrong peg.

The number of disks rises across eight levels, and each level has a known minimum number of moves worth aiming for.

Tips

• Start by thinking about the smallest disk. The tiny disk moves most often, and its moves follow a steady rhythm, so getting a feel for where it goes next carries much of the solution.
• Move the smallest disk the same direction each time. Always shifting the smallest disk in one consistent direction, then making the only other legal move, produces the perfect solution automatically.
• Break the puzzle into smaller towers. To move a big stack, you first move the stack above it out of the way. Seeing the problem as 'move the smaller tower, then the big disk, then the tower back' makes any size manageable.
• Never undo your last move. Immediately moving a disk back where it came from wastes two moves and gets you nowhere, so if a move feels pointless, it usually is.
• Aim for the minimum move count. Each level has an exact fewest-moves target, and trying to hit it forces you to find the clean pattern instead of shuffling disks around randomly.
• Stay patient on the big towers. The larger puzzles take hundreds of moves, so trust the pattern and keep the rhythm steady rather than trying to rush toward the finish.

Frequently asked questions