Nanro is a number placement logic puzzle where numbers must be entered into a grid.
The objective is insert numbers, subject to the following rules:
- Each area must contain at least one numbered cell.
- Numbers in some cells count the total of numbered cells in that area.
- Where two numbers connect across a boundary between areas, those numbers must be different.
- Numbers must form one, connected area with no 2x2 areas of numbered cells.
A standard 10x10 nanro and its solution.