Game guide · SYNTAXCODER
Learn the rules of Tower of Hanoi
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. The game area remains available above the explanation. 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.
Practice beyond the first move
An empty tower accepts any disc; an occupied tower accepts only a smaller disc than its top disc.
The purpose of your moves
The board gives you the information needed for the 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.
The steps to 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.
Controls
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.
Put the rules into context
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.
Check this before moving on
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.
A few questions answered
On this page, 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 worked example offers another way to follow the rule.
How do the controls work?
Tap the source tower and then its destination. Tap the selected tower again to cancel the selection. No download or player account is required.
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.
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. The instructions above use these same rules.
When I start, 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. Keep the current game state in view while applying this rule.
For this game, how many people can play here?
Solo. This is local browser play, not internet matchmaking. A new round resets the current game.
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. Keep the current game state in view while applying this rule.
When I start, can I move several discs together?
No. One top disc moves at a time. The instructions above use these same rules.
What does Undo do?
It restores the immediately previous puzzle state and move count. The controls work with mouse or touch.
On this page, can I use the middle tower?
Yes. It is a temporary holding tower needed to move the stack legally. No download or player account is required.
