Potion stacking puzzle · 6 levels Tower of Hanoi.

Move the whole potion stack to peg C. One disk at a time, never a bigger disk on a smaller one.

Stacking the potion disks…

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Moves0

Best possible7

Time0:00

See the optimal solution from here

Tap a peg to lift its top disk, then tap where it goes. You can also drag.

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Tap or click a peg to lift its top disk, then tap the peg to drop it on, or drag the disk across. Keys 1, 2 and 3 pick pegs A, B and C; Escape puts the disk back.

Stars: 3 for the fewest possible moves, 2 within half as many again, 1 for any finish. Using Hint caps a round at 2 stars, and an undone move still counts. Your best stars, moves and time for each level are saved on this device.

How to play the Tower of Hanoi game online

The Tower of Hanoi is a stack of disks on the first of three pegs, smallest on top. Move the whole stack to the last peg, one disk at a time, without ever putting a bigger disk on a smaller one. Here the disks are alchemy potion disks on glass pegs, and the game has six levels, from 3 disks (7 moves at best) to 8 disks (255 moves).

How are stars earned?

Finish in the fewest possible moves, 2 to the power of the number of disks minus 1, for 3 stars. Finish within half as many moves again for 2 stars, and any finish earns 1. Hint shows the best next move from any position, and caps the round at 2 stars.

What is the trick?

To move n disks, move the top n − 1 to the spare peg, move the biggest disk across, then move the n − 1 disks back on top. By hand, move the smallest disk every other turn, always in the same direction round the pegs.

For the recursive idea and a step-by-step routine, read the Tower of Hanoi game guide. Want to watch the shortest solution from where you are? Open the Tower of Hanoi solver.