### Gappy

**Gappy** is played on a square grid. The aim is to blacken some cells of a grid according to the following rules:

- Each row and each column contains two black cells.
- No black cells touch each other, not even diagonally.
- Numbers outside the grid show the quantity of white cells between black cells in corresponding row or column.

**Cross+A** allows to add one more rule: each diagonal must contain two black cells. Use the check box **Diagonals** to add this condition.

**Cross+A** can solve puzzles from **9 x 9** to **30 x 30**.