Game guide · YOUDIYOU
How to play Tower of Hanoi
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. Start a new round when you are ready to try again. 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.
A focus for your next round
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 game area remains available above the explanation.
Aim for this result
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. The game area remains available above the explanation.
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.
How your actions work
The example and rules describe the same game you can play above. Tap the source tower and then its destination. Tap the selected tower again to cancel the selection. The game area remains available above the explanation.
Try this 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.
Avoid this misunderstanding
Take a moment to check the current turn. 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.
Read these answers for extra help
When I start, 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. You can start a new round from the game controls.
On this page, how do the controls work?
Tap the source tower and then its destination. Tap the selected tower again to cancel the selection. Keep the current game state in view while applying this rule.
Can you show an example?
Three discs can be transferred in seven legal moves. Four discs need at least fifteen moves. You can start a new round from the game controls.
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. Scores here do not represent cash or prizes.
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. Keep the current game state in view while applying this rule.
For this game, how many people can play here?
Solo. This is local browser play, not internet matchmaking. You can start a new round from the game controls.
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. Use the labelled controls for your next action.
When I start, can I move several discs together?
No. One top disc moves at a time. A new round resets the current game.
During a round, what does Undo do?
It restores the immediately previous puzzle state and move count. You can start a new round from the game controls.
When I start, can I use the middle tower?
Yes. It is a temporary holding tower needed to move the stack legally. No download or player account is required.
