### Summer 2007: Nurikabe

The idea of Nurikabe is to color each square in an n x n grid white or black according to the following rules:

This month's puzzle is to solve the following 9 x 9 Nurikabe puzzle.

- Each numbered cell must be part of a connected white region (connected always means edge-to-edge, not corner-to-corner).
- Each connected white region must contain exactly one number, and this value is the number of white cells in the region (including the numbered cell).
- The black region must be connected.
- There can be no 2 x 2 blocks of black cells.

This month's puzzle is to solve the following 9 x 9 Nurikabe puzzle.

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