The Hamiltonian Circuit

In-app purchases
27 reviews
Content rating
Screenshot image
Screenshot image
Screenshot image
Screenshot image

About this game

Try The Hamiltonian Circuit, a fun, relaxing puzzle game that's easy to learn and tough to master.

Find a path that visits every square in the grid, avoiding walls and never crossing itself, to create one continuous circuit. There's only one solution for every puzzle.

To get the hang of things, start with one of the simple 4x4 grids. Plot your moves carefully. Try to think ahead; not just by one square, but by four or five. If you think you've made a mistake, trace back over your line. It will disappear.

If you really get stuck, press Hints. If you have any mistakes, one will turn red, then disappear. But if you're on the right path, we'll add a line.

Puzzles start with 4x4 grids and go all the way to 20x20. The bigger puzzles are very challenging and can take hours to solve. If you have to quit in the middle of one, don't worry: your progress is automatically saved.

Many find working on these circuits meditative; others reach for the ibuprofen. But no matter which camp you find yourself in, know you're exercising your abstract thinking skills and challenging your brain in ways that actually matter.

Inspired by a puzzle created by Irish mathematician William Rowan Hamilton in 1857, these circuits start off easy and get hard. Really hard. Good luck!
Updated on
Oct 16, 2023

Data safety

Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
This app may share these data types with third parties
Device or other IDs
This app may collect these data types
App activity and App info and performance
Data is encrypted in transit
You can request that data be deleted

Ratings and reviews

24 reviews
Ella Martin
March 11, 2022
The premise of this game is EXCEPTIONAL!! However, 90% of the levels you have to pay for. $2.99 for one pack (and there are around 2 dozen packs) is highway robbery. If more than 1/2 of the first pack was free, I would rate this game 5⭐ in a heartbeat.
14 people found this review helpful
Did you find this helpful?
Good Thinking Games Ltd
March 14, 2022
Thanks for the feedback. I have just uploaded a change to make the whole first pack free (including 20 hex grid puzzles). It will take a couple of hours to be available on the Play Store. Best, David Good Thinking Games
Serenity Rivers
March 22, 2022
Controls are buggy and clunky, inputs are slow, the inputs dont line up with the squares, the scoring system doesnt make sense sometimes i got a perfect score after messing up a few times while other times i did it perfectly but got 0 out of 40 i dont recommend this game
5 people found this review helpful
Did you find this helpful?
Ray Anderson
March 15, 2022
Pretty fun game until you finish the first puzzle pack, which is the only free puzzle pack. It took me not long to go through all the free content and I really do wish there was more, as this is a fun game!
Did you find this helpful?

What's new

Fixes percentile scoring.
Adds a confirmation for puzzle reset.