Game guide · SBBEN
Tower of Hanoi: rules and examples
Keep the goal in view while choosing a move. Move the complete stack of discs from the left tower to the right tower without placing a larger disc on a smaller one. Try the rule on the board, then read the next instruction. 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 beyond the first move
A careful first move helps you understand the round. 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.
Aim for this result
The board gives you the information needed for the next action. Move the complete stack of discs from the left tower to the right tower without placing a larger disc on a smaller one. The game area remains available above the explanation.
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.
Try this example
Begin with the basic rule, then follow the result of your action. Three discs can be transferred in seven legal moves. Four discs need at least fifteen moves. The game area remains available above the explanation.
Notice this detail
The board gives you the information needed for the 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
During a round, 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 game is played locally in your browser.
How do the controls work?
Tap the source tower and then its destination. Tap the selected tower again to cancel the selection. You can start a new round from the game controls.
Can you show an example?
Three discs can be transferred in seven legal moves. Four discs need at least fifteen moves. The instructions above use these same rules.
For this game, which mistake should I avoid?
Only the top disc can leave a tower. Moving a large disc onto a small disc is rejected. Use the labelled controls for your next action.
For this game, 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. No download or player account is required.
For this game, how many people can play here?
Solo. This is local browser play, not internet matchmaking. The controls work with mouse or touch.
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.
When I start, can I move several discs together?
No. One top disc moves at a time. You can start a new round from the game controls.
On this page, what does Undo do?
It restores the immediately previous puzzle state and move count. Keep the current game state in view while applying this rule.
On this page, can I use the middle tower?
Yes. It is a temporary holding tower needed to move the stack legally. The controls work with mouse or touch.
