Game guide · GDAIZHIBO
Read before your next round 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. 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
The example and rules describe the same game you can play above. An empty tower accepts any disc; an occupied tower accepts only a smaller disc than its top disc.
The challenge in front of you
A careful first move helps you understand the round. Move the complete stack of discs from the left tower to the right tower without placing a larger disc on a smaller one.
Follow these playing steps
- 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.
Your inputs
The board gives you the information needed for the next action. Tap the source tower and then its destination. Tap the selected tower again to cancel the selection. Start a new round when you are ready to try again.
One way to understand the rules
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.
One detail worth checking
Only the top disc can leave a tower. Moving a large disc onto a small disc is rejected. Keep the goal in mind before your next move.
If you are unsure
For 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. The worked example offers another way to follow the rule.
During a round, how do the controls work?
Tap the source tower and then its destination. Tap the selected tower again to cancel the selection. The worked example offers another way to follow the rule.
On this page, can you show an example?
Three discs can be transferred in seven legal moves. Four discs need at least fifteen moves. Keep the current game state in view while applying this rule.
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. You can start a new round from the game controls.
When I start, 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. Scores here do not represent cash or prizes.
On this page, how many people can play here?
Solo. This is local browser play, not internet matchmaking. No download or player account is required.
During a round, 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. A new round resets the current game.
On this page, can I move several discs together?
No. One top disc moves at a time. Keep the current game state in view while applying this rule.
When I start, what does Undo do?
It restores the immediately previous puzzle state and move count. The controls work with mouse or touch.
On this page, can I use the middle tower?
Yes. It is a temporary holding tower needed to move the stack legally. Use the labelled controls for your next action.