Game guide · LCHFY
Learn the rules of Tower of Hanoi
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. Keep the goal in mind before your next move. Choose three to eight discs. All discs begin on the left tower. Keep the goal in mind before your next move.
One puzzle with adjustable disc count from three to eight. Disc counts are settings, not separate game entries. Undo is available; refreshing restarts.
Practice with a purpose
Begin with the basic rule, then follow the result of your action. An empty tower accepts any disc; an occupied tower accepts only a smaller disc than its top disc. Keep the goal in mind before your next move.
What you need to achieve
Begin with the basic rule, then follow the result of your action. Move the complete stack of discs from the left tower to the right tower without placing a larger disc on a smaller one. Start a new round when you are ready to try again.
Step by step
- 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.
The controls to know
Begin with the basic rule, then follow the result of your action. Tap the source tower and then its destination. Tap the selected tower again to cancel the selection.
Put the rules into context
A careful first move helps you understand the round. Three discs can be transferred in seven legal moves. Four discs need at least fifteen moves.
Keep this in mind
Read the position before choosing your next action. Only the top disc can leave a tower. Moving a large disc onto a small disc is rejected. Start a new round when you are ready to try again.
Questions about this game
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. Use the labelled controls for your next action.
For this game, how do the controls work?
Tap the source tower and then its destination. Tap the selected tower again to cancel the selection. Use the labelled controls for your next action.
Can you show an example?
Three discs can be transferred in seven legal moves. Four discs need at least fifteen moves. Use the labelled controls for your next action.
Which mistake should I avoid?
Only the top disc can leave a tower. Moving a large disc onto a small disc is rejected. The game is played locally in your browser.
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. The game is played locally in your browser.
During a round, how many people can play here?
Solo. This is local browser play, not internet matchmaking. No download or player account is required.
On this page, 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. No download or player account is required.
During a round, 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. You can start a new round from the game controls.
For this game, can I use the middle tower?
Yes. It is a temporary holding tower needed to move the stack legally. The instructions above use these same rules.