0h h1

Q42

In-app purchases

About this game

0h h1 is a little logic game that follows three simple rules:

- Three red tiles or three blue tiles next to each other in a row or column isn't allowed
- A full row or column must have as many blue tiles as it has red ones.
- No two rows are the same. No two columns either.

It's up to you to complete the grid without ever having to guess. Simply tap a tile to make it blue or red and complete the grid.

0h h1 is 100% free, without ads or locked content and gives you unlimited puzzles in these grid sizes:

4 x 4
6 x 6
8 x 8
10 x 10
12 x 12

Each puzzle can be played in perfect Zen mode without any pressure. But you can attempt to beat your personal best time in the game's time trials, unlock fun achievements and compete with friends in leaderboards.

0h h1 is akin to Binary Sudoku, also known as Takuzu, Binairo or Binaire.
0h h1 is a little gift to you. I hope you enjoy it.
0h h1 can also be played on 0hh1.com.

And don't forget to check out its sibling game 0h n0! 0hn0.com

Ratings and reviews

I like this game! A nice puzzle game if you like sudoku and want a similar challenge with new rules to exercise your brain. I only wish that games would save their place when I'm not on the app for a while. It seems a little weird that it all just restarts when the app is closed or left for a long time and so you have to start a new game. It's honestly such a bummer whenever I find an almost-finished game erased that I don't know if I'll use the app much longer.

Fun and simple controls however I would like a few additions/changes. First of all, I don't think the timer should start till you make your first move. Second it would be nice if you could disable the hint when you incorrectly complete the board, instead it just told you that something was wrong. And lastly a reset puzzle button. I would be very greatful if these things were acted upon in the future!

Truly a fun logic game. Very simple mechanics, easy to play and learn, and addicting in the sense that I always want to do another puzzle! I like that it makes you think, unlike the popular idle games, but not so much that you can't play while also watching a TV show or listening to music. One note to the developers: After playing "Oh n0" for a bit, when I changed the theme in this game to "Oh h1" it felt backwards because 1 tap is red and 2 taps is blue, but it's the opposite in "Oh n0".

What's new

We've added support to sync your score and games played with Google Play Game Services. This means you can now take your progress with you from your old device to your new one!

Also, there's a new setting called Fast Intro, which makes the game start faster so you can get to your puzzle as quickly as possible :)

Finally, to support Ukraine, we've added a matching color theme. It will get enabled by default, but you can revert back to the original 0h h1 theme from the settings screen.