Game guide · LOUPINWU
Tower of Hanoi: how a round works
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. The game area remains available above the explanation. Choose three to eight discs. All discs begin on the left tower. Try the rule on the board, then read the next instruction.
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
Begin with the basic rule, then follow the result of your 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.
What you need to achieve
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.
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.
Making selections and moves
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.
One way to understand the rules
The example and rules describe the same game you can play above. 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.
A mistake to avoid
Check the rule below as you play. Only the top disc can leave a tower. Moving a large disc onto a small disc is rejected. The game area remains available above the explanation.
Answers about the rules and controls
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 controls work with mouse or touch.
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.
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.
On this page, 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.
On this page, 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. The worked example offers another way to follow the rule.
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.
For this game, 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. You can start a new round from the game controls.
On this page, can I move several discs together?
No. One top disc moves at a time. Scores here do not represent cash or prizes.
When I start, 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. Scores here do not represent cash or prizes.
