Look-Air ("Rukkuea") is a logic puzzle. It is necessary to blacken some cells according to the following rules:
Black cells form an area of square shape.
No black areas touch each other horizontally or vertically (only diagonally).
Black areas of the same size must not "see" each other: horizontal or vertical lines between two black areas must contain at least one black area of other size.
Each number shows how many of the five cells (the one with the number plus the four orthogonally neighboring cells) should be blacken.
Black cells form an area of square shape.
No black areas touch each other horizontally or vertically (only diagonally).
Black areas of the same size must not "see" each other: horizontal or vertical lines between two black areas must contain at least one black area of other size.
Each number shows how many of the five cells (the one with the number plus the four orthogonally neighboring cells) should be blacken.