Game guide · YDWEIXIU
How to play Tower of Hanoi
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. 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.
Something to practise
Check the rule below as you play. An empty tower accepts any disc; an occupied tower accepts only a smaller disc than its top disc.
The objective of a round
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. Keep the goal in mind before your next move.
How a round unfolds
- 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
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.
Follow the example
Read the position before choosing your next 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
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. Try the rule on the board, then read the next instruction.
Common questions
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 instructions above use these same rules.
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 game is played locally in your browser.
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.
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. The worked example offers another way to follow the rule.
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. Use the labelled controls for your next action.
How many people can play here?
Solo. This is local browser play, not internet matchmaking. No download or player account is required.
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. Scores here do not represent cash or prizes.
For this game, can I move several discs together?
No. One top disc moves at a time. A new round resets the current game.
For this game, what does Undo do?
It restores the immediately previous puzzle state and move count. Scores here do not represent cash or prizes.
For this game, can I use the middle tower?
Yes. It is a temporary holding tower needed to move the stack legally. The game is played locally in your browser.
