Rules:
- Paint some unnumbered cells black to form one continuous black chain.
- Paint remaining cells white to form white chains,
each containing one numbered cell, and exactly as many cells in
total as that number.
- Diagonal connections do not link chains.
- No 2x2 square may be entirely black.
- (Hint: The 14+15 in lower left will soon be almost forced.
The puzzle is still very difficult.)
- (Read more about Nurikabe.)
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Procedure:
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