Regional Yajilin (also known as "Yajilin (Regions)") is a square or rectangular grid divided into regions. The aim is to blacken some cells and to draw a single non-intersecting loop through all the white cells. A number in a region indicates the number of black cells in that region. A region without a number can contain any amount of black cells. No two black cells can share a border. The loop may visit numbered cells; numbered cells can be blackened.
Cross+A can solve puzzles from 3 x 3 to 30 x 30.