**Binairo** (also known as *"Binary Puzzle"*, *"Takuzu"*, *"Tohu wa Vohu"*) is played on a rectangular or square grid. The goal is to fill in the grid with digits "0" and "1" according to the following rules:

- There are as many digits "1" as digits "0" in every row and every column (or one more for odd sized grids).
- No more than two cells in a row can contain the same number.
- Each row is unique, and each column is unique.

**Cross+A** can solve puzzles from **4 x 4** to **16 x 16**.