Tower of Hanoi

How to play Tower of Hanoi

Tower of Hanoi starts with three discs and works up to seven. Only one disc moves at a time, only from the top of a peg, and a disc may never rest on a smaller one. The minimum number of moves doubles plus one with each disc added, so the seven-disc level takes at least 127 moves.

Each level shows the par — the optimal move count — next to your running total. Solving a level at par is tracked separately from simply solving it.

Objective

Move the whole stack to the right-hand peg in as few moves as possible, one disc at a time.

Features

• Five levels from three discs up to seven
• Par move count shown and checked for every level
• Illegal moves are rejected with a clear reason
• Click-to-lift or drag to move discs
• Best move count saved per level

Scores are saved in this browser only. There is no global ranking and nothing is uploaded.