Game guide · ZBHQK
Tower of Hanoi: instructions and practice
Take a moment to check the current turn. Move the complete stack of discs from the left tower to the right tower without placing a larger disc on a smaller one. Choose three to eight discs. All discs begin on the left tower. Try the rule on the board, then read the next instruction.
One puzzle with adjustable disc count from three to eight. Disc counts are settings, not separate game entries. Undo is available; refreshing restarts.
Try a more deliberate round
Keep the goal in view while choosing a move. An empty tower accepts any disc; an occupied tower accepts only a smaller disc than its top disc. The game area remains available above the explanation.
Your objective
Check the rule below as you play. Move the complete stack of discs from the left tower to the right tower without placing a larger disc on a smaller one.
How to proceed
- Choose three to eight discs. All discs begin on the left tower.
- Select the source tower, then the destination tower. Only the top disc moves.
- An empty tower accepts any disc; an occupied tower accepts only a smaller disc than its top disc.
- Use Undo to reverse a move. Complete the puzzle when the right tower holds the whole stack.
Keyboard and screen controls
The example and rules describe the same game you can play above. Tap the source tower and then its destination. Tap the selected tower again to cancel the selection. The game area remains available above the explanation.
Work through an example
Check the rule below as you play. Three discs can be transferred in seven legal moves. Four discs need at least fifteen moves. Start a new round when you are ready to try again.
Watch out for this
Use the controls beside the game rather than guessing the rules. Only the top disc can leave a tower. Moving a large disc onto a small disc is rejected.
More answers before you play
On this page, what is the aim of Tower of Hanoi?
Move the complete stack of discs from the left tower to the right tower without placing a larger disc on a smaller one. The controls work with mouse or touch.
On this page, how do the controls work?
Tap the source tower and then its destination. Tap the selected tower again to cancel the selection. A new round resets the current game.
On this page, can you show an example?
Three discs can be transferred in seven legal moves. Four discs need at least fifteen moves. The worked example offers another way to follow the rule.
Which mistake should I avoid?
Only the top disc can leave a tower. Moving a large disc onto a small disc is rejected. Keep the current game state in view while applying this rule.
During a round, what rules and limits are used here?
One puzzle with adjustable disc count from three to eight. Disc counts are settings, not separate game entries. Undo is available; refreshing restarts. You can start a new round from the game controls.
For this game, how many people can play here?
Solo. This is local browser play, not internet matchmaking. The game is played locally in your browser.
When I start, what is the minimum number of moves?
For n discs the minimum is 2^n − 1. The board shows the minimum for your selected disc count. You can start a new round from the game controls.
On this page, can I move several discs together?
No. One top disc moves at a time. A new round resets the current game.
What does Undo do?
It restores the immediately previous puzzle state and move count. Scores here do not represent cash or prizes.
On this page, can I use the middle tower?
Yes. It is a temporary holding tower needed to move the stack legally. A new round resets the current game.
