Nurikabe is a fun Japanese Puzzle Game similar to sudoku RULES: Find all of the islands. The completed grid is a sea of Blue water with White islands. The numbers tell you how many White squares are in each island. Every island is isolated from every other island vertically and horizontally but they may touch diagonally. Any Blue water square can be reached from any other (i.e. they are connected). 2x2 Blue water blocks are NOT allowed (2x2 White island blocks are).