Gappy

Gappy ("Gaps") 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.