It is necessary to draw a single line, dividing the table into empty sections with numbers, subject to the rules.
In the nurikabe puzzle, you need to draw lines (symbolize rivers), so that the table is divided into empty sections with numbers (symbolize islands), observing the following rules:
The river must be solid, i.e. all colored cells must be connected into a single chain.
Shaded cells cannot form a 2x2 square (or bigger).
Each island must have only one number equal to the number of cells in the island.
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