About Stair Logic
Stair Logic is the classic Tower of Hanoi. Move a stack of discs from the left peg to the right peg, one disc at a time, and never place a larger disc on a smaller one. The perfect solution takes exactly 2 to the power of n minus 1 moves, which is shown as the par.
How to play
- Tap a peg to pick up its top disc, then tap the peg to drop it on.
- A larger disc can never sit on a smaller disc.
- Move all discs to the right peg.
Tips and strategy
- The smallest disc moves every other turn, always in the same direction.
- To move n discs, first move n minus 1 discs out of the way.
- With an even number of discs the smallest disc starts toward the middle peg.
Levels, stars and XP
Finish a level to earn one to three stars and XP towards your player level. Replay any unlocked level to improve your stars. From level 151 the game enters endless mode, where each level is a remix of an earlier one with fresh colours and a slightly higher difficulty.
Frequently asked questions
- How do I play Stair Logic?
- Tap a peg to pick up its top disc, then tap the peg to drop it on. A larger disc can never sit on a smaller disc. Move all discs to the right peg.
- What is a good strategy for Stair Logic?
- The smallest disc moves every other turn, always in the same direction.
- How many levels does Stair Logic have?
- Stair Logic has 150 levels that rise gradually in difficulty. After level 150 the game continues without end: levels are drawn from the first 150 in a newly shuffled order, with new colours, flipped or rotated layouts and a small difficulty boost, so the level number keeps increasing.
- Is it free to play?
- Yes. Stair Logic is completely free and runs in your browser on phones, tablets and computers. No download or account is needed.
- Does my progress save?
- Your level, stars and XP are saved in your browser on this device. Clearing your site data will reset them.