Game guide · HKXLJJ
Tower of Hanoi: learn through an example
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. 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.
One thing to notice as you play
The board gives you the information needed for the next action. An empty tower accepts any disc; an occupied tower accepts only a smaller disc than its top disc. Try the rule on the board, then read the next instruction.
Aim for this result
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.
The order of play
- 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
Check the rule below as you play. 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.
Try this example
Use the controls beside the game rather than guessing the rules. Three discs can be transferred in seven legal moves. Four discs need at least fifteen moves. Keep the goal in mind before your next move.
Check this before moving on
Begin with the basic rule, then follow the result of your action. 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.
Further help with the game
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. A new round resets the current game.
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. Scores here do not represent cash or prizes.
During a round, can you show an example?
Three discs can be transferred in seven legal moves. Four discs need at least fifteen moves. A new round resets the current game.
During a round, which mistake should I avoid?
Only the top disc can leave a tower. Moving a large disc onto a small disc is rejected. A new round resets the current game.
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. A new round resets the current game.
When I start, how many people can play here?
Solo. This is local browser play, not internet matchmaking. Keep the current game state in view while applying this rule.
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.
On this page, can I move several discs together?
No. One top disc moves at a time. Use the labelled controls for your next action.
During a round, what does Undo do?
It restores the immediately previous puzzle state and move count. A new round resets the current game.
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.
