Game guide · 371HOTEL
Tower of Hanoi: what to know before playing
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.
An idea for your next attempt
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. Keep the goal in mind before your next move.
Your objective
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. Try the rule on the board, then read the next instruction.
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.
Keyboard and screen controls
Check the rule below as you play. Tap the source tower and then its destination. Tap the selected tower again to cancel the selection. Try the rule on the board, then read the next instruction.
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. The game area remains available above the explanation.
A useful caution
A careful first move helps you understand the round. Only the top disc can leave a tower. Moving a large disc onto a small disc is rejected.
Game-specific help
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. Keep the current game state in view while applying this rule.
When I start, 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. Keep the current game state in view while applying this rule.
Which mistake should I avoid?
Only the top disc can leave a tower. Moving a large disc onto a small disc is rejected. The game is played locally in your browser.
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. The instructions above use these same rules.
On this page, how many people can play here?
Solo. This is local browser play, not internet matchmaking. The game is played locally in your browser.
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. A new round resets the current game.
Can I move several discs together?
No. One top disc moves at a time. Use the labelled controls for your next action.
For this game, what does Undo do?
It restores the immediately previous puzzle state and move count. A new round resets the current game.
When I start, can I use the middle tower?
Yes. It is a temporary holding tower needed to move the stack legally. Keep the current game state in view while applying this rule.