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

Interesting game but like others said, gets old after a little while. My 6 year old is able to do the 6x6 boards on her own (for context). I'd give it higher stars if your progress didn't disappear virtually every time you go away from the game for anything length of time, for that reason alone I wouldn't recommend since you can't casually play at your leisure without "fear" of your progress disappearing.

Amazing puzzle game! It can either be relaxing or exciting depending on how you play it: back when I started, I loved the huge boards, but now I like to beat the small boards as fast as possible, my best time being 2s on 4x4! I love this game so much, it introduced me to a great developer who I will surely be paying attention to from now on. I just wish there was some sort of way to connect with its community! But I guess that's nothing wrong with the game. Overall it's awesome, love it!!

I enjoyed this puzzle even more than I expected. It's original and very well made. Something to note that I like, but hard core puzzlers may not, is that it seems these can be solved by continually applying a small set of rules in order. Unlike in sudoku, there's no need to lookahead into the space of possible configurations. The challenge here instead comes from searching for where a rule applies, and not messing up. The architecture of sudoku with the challenge of word search. Really fun.