The main challenge of a Sunome puzzle is drawing a maze. Numbers surrounding the outside of the maze border give an indication of how the maze is to be constructed. To solve the puzzle you must draw all the walls where they belong and then draw a path from the Start square to the End square.
The walls of the maze are to be drawn on the dotted lines inside the border. A single wall exists either between 2 nodes or a node and the border. The numbers on the Top and Left side of the border tell you how many walls are on that line of the grid. The numbers on the Right and Bottom of the border tell you how many walls exist in those rows and columns, respectively. In addition, the following must be true:
- Each puzzle has a unique solution.
- There is only 1 maze path to the End square.
- Every Node must have a wall touching it.
- Walls must trace back to a border.
- If the Start and End squares are adjacent to each other a wall must separate them.
- Start squares may be open on all sides, while End squares must be closed on 3 sides.
- You cannot completely close off any region of the grid.
Examine the first example, then solve the other three puzzles.
The solutions are shown below.