Game guide · SHOUJIKON
Tower of Hanoi: learn through an example
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. Try the rule on the board, then read the next instruction. 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.
A focus for your next round
Check the rule below as you play. 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.
Understand the aim
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.
The controls to know
A careful first move helps you understand the round. Tap the source tower and then its destination. Tap the selected tower again to cancel the selection.
Put the rules into context
Read the position before choosing your next action. Three discs can be transferred in seven legal moves. Four discs need at least fifteen moves. Start a new round when you are ready to try again.
A mistake to avoid
Read the position before choosing your next action. Only the top disc can leave a tower. Moving a large disc onto a small disc is rejected. Try the rule on the board, then read the next instruction.
Questions about this game
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 instructions above use these same rules.
On this page, 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.
On this page, can you show an example?
Three discs can be transferred in seven legal moves. Four discs need at least fifteen moves. No download or player account is required.
For this game, which mistake should I avoid?
Only the top disc can leave a tower. Moving a large disc onto a small disc is rejected. Keep the current game state in view while applying this rule.
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 game is played locally in your browser.
When I start, 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.
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. The controls work with mouse or touch.
When I start, can I move several discs together?
No. One top disc moves at a time. The worked example offers another way to follow the rule.
When I start, what does Undo do?
It restores the immediately previous puzzle state and move count. No download or player account is required.
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.