Coffee Break

Nurikabe is a logic puzzle. You must decide if each cell is part of an island (white) or wall (dark blue) according to the following rules:

1. All wall cells (dark blue) must be connected.
2. Each numbered cell must be part of an island of connected white cells.
3. Each island must have the same number of white cells as the number it contains (including the numbered cell).
4. Two islands must not be connected.
5. There cannot be any 2x2 blocks of dark blue cells.

To change the colour of a cell, click once for white, or twice for dark blue.