0HH1 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. 0HH1 gives you unlimited puzzles in four grid sizes:

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

Each puzzle can be played in perfect Zen mode without any pressure.