Hanare ("Hanaregumi"; from Japanese, literally "family pair") is a logic puzzle. A square or rectangular grid is divided into regions. The aim to place a number into each region. A number is equal to the size of the region. The distance between two horizontally or vertically neighboring numbers must be equal to the difference of these numbers.
Cross+A can solve puzzles from 3 x 3 to 30 x 30.