1. Make walls by painting cells under the following rules, and create a maze which goes from S to G across only white cells.
  2. The areas enclosed by bold lines are called “Rooms”. All cells in a Room have to be painted over or left white.
  3. White cells cannot be entirely cut off by painted cells, and white cells must not form a loop.
  4. The Rooms with S, G, ○(circle), and △(triangle) cannot be painted. All the ○(circle) cells will be on the shortest way from S to G, and there are no cells with △(triangle) on the shortest course from S to G.
  5. Black and white cells cannot cover 2×2 or larger squares.

List of puzzles