Range

Range is a grid-based puzzle where the player needs to color certain squares black so as to meet specified conditions. Some blank squares contain numbers, indicating that they need to "see" that many squares in all orthogonal directions (including the numbered square itself) up to where the line of sight is blocked by a black square. Black squares cannot be adjacent orthogonally to each other, and they cannot completely block off a part of the grid from the rest. The size of the grid can be freely selected by the player.