Game guide · SXSS56
Tower of Hanoi: learn through an example
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. 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.
An idea for your next attempt
Read the position before choosing your next action. An empty tower accepts any disc; an occupied tower accepts only a smaller disc than its top disc. Start a new round when you are ready to try again.
The challenge in front of you
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.
Making your moves
- 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 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. Try the rule on the board, then read the next instruction.
See how the rules apply
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. The game area remains available above the explanation.
Pay attention to this rule
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. The game area remains available above the explanation.
More answers before you play
For this 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. You can start a new round from the game controls.
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. Use the labelled controls for your next action.
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. The worked example offers another way to follow the rule.
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. A new round resets the current game.
How many people can play here?
Solo. This is local browser play, not internet matchmaking. The game is played locally in your browser.
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.
During a round, can I move several discs together?
No. One top disc moves at a time. A new round resets the current game.
What does Undo do?
It restores the immediately previous puzzle state and move count. The worked example offers another way to follow the rule.
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.
