Game guide · 12530NET
Know the goal in Tower of Hanoi
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. Choose three to eight discs. All discs begin on the left tower.
One puzzle with adjustable disc count from three to eight. Disc counts are settings, not separate game entries. Undo is available; refreshing restarts.
Practice beyond the first move
Use the controls beside the game rather than guessing the rules. An empty tower accepts any disc; an occupied tower accepts only a smaller disc than its top disc.
What the game asks you to do
The example and rules describe the same game you can play above. 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.
The order of play
- 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. Keep the goal in mind before your next move.
Work through an example
Begin with the basic rule, then follow the result of your action. 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
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.
Clarifying the way this game works
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. You can start a new round from the game controls.
How do the controls work?
Tap the source tower and then its destination. Tap the selected tower again to cancel the selection. The controls work with mouse or touch.
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. Scores here do not represent cash or prizes.
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. A new round resets the current game.
For this game, 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. 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. No download or player account is required.
On this page, what does Undo do?
It restores the immediately previous puzzle state and move count. Scores here do not represent cash or prizes.
When I start, 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.
