Game guide · KSZXDJJ
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. Try the rule on the board, then read the next instruction. 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.
Take a closer look while playing
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.
The objective of a round
Read the position before choosing your next action. 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.
How your actions work
Read the position before choosing your next action. 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.
One way to understand the rules
Check the rule below as you play. Three discs can be transferred in seven legal moves. Four discs need at least fifteen moves.
Where a round can go wrong
Use the controls beside the game rather than guessing the rules. Only the top disc can leave a tower. Moving a large disc onto a small disc is rejected. Start a new round when you are ready to try again.
Further help with the game
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 game is played locally in your browser.
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. You can start a new round from the game controls.
On this page, can you show an example?
Three discs can be transferred in seven legal moves. Four discs need at least fifteen moves. Scores here do not represent cash or prizes.
When I start, which mistake should I avoid?
Only the top disc can leave a tower. Moving a large disc onto a small disc is rejected. No download or player account is required.
For this game, 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. No download or player account is required.
When I start, how many people can play here?
Solo. This is local browser play, not internet matchmaking. A new round resets the current game.
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. Scores here do not represent cash or prizes.
On this page, 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. Keep the current game state in view while applying this rule.
For this 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.