How do you play nurikabe?

Question asked by: knowitall

Nurikabe is not a particularly common Japanese puzzle game in the UK, not having reached the popularity of puzzles like sudoku.

However it is good fun, has simple rules, and is satisfying to complete a puzzle.

Like most of these puzzles, it is grid based. The grid may be any size and tends to be square shaped, e.g. a 7 x 7 grid.

Most cells will be blank, whilst others will have a number in.

The aim is to determine for every cell whether it is white or black.

A white cell is said to be part of an island of a fixed number of cells, as determined by the numbers initially placed on the grid. A black cell is said to be the water between the islands.

Thus if on the grid you see the following numbers placed on the grid: 7, 5, 4, 2 then this means there are a total of 7 + 5 + 4 + 2 cells on the grid that are white, (18) the rest are black.

The following rules help you:

- Each set of white cells must be surrounded on all sides by black cells (e.g. adjacent cells)

- All the black cells must be linked to form one continuous shape, no black cells may be isolated from any others therefore

- The black cells can never form a 2 x 2 shape of black cells in a valid puzzle

Using the rules and logic alone you can always determine the answer to this fun puzzle that is nurikabe!

By: Unknown
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