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Nurikabe is a popular grid puzzle, usually played on a square grid. Here is my attempt to adapt it to a hexagonal grid.
To solve it, you must shade cells in the grid such that these conditions are met:

  • Like regular Nurikabe, each region of unshaded cells must contain exactly one number, which is equal to the size of the region. (numbered cells can never be shaded)
  • All shaded cells must form a continuous region
  • Three shaded cells must not form a closed triangle (i.e. Three cells around a vertex must not all be shaded)

enter image description here

Here it is in text form if you prefer

             __
          __/  \__
       __/ 2\__/  \__
    __/  \__/  \__/  \__
 __/  \__/  \__/  \__/  \__
/  \__/  \__/ 2\__/  \__/ 4\
\__/ 1\__/  \__/  \__/  \__/
/  \__/  \__/  \__/  \__/  \
\__/  \__/  \__/  \__/  \__/
/  \__/  \__/  \__/  \__/  \
\__/  \__/  \__/  \__/  \__/
/  \__/  \__/  \__/  \__/  \
\__/ 3\__/  \__/13\__/  \__/
/  \__/  \__/  \__/  \__/  \
\__/  \__/  \__/  \__/ 7\__/
   \__/  \__/  \__/  \__/
      \__/  \__/  \__/
         \__/  \__/
            \__/
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    $\begingroup$ Nice idea, and the example shows the puzzle has good potential! $\endgroup$
    – aschepler
    Nov 30, 2020 at 18:46

1 Answer 1

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To start, we can

immediately close the 1 in. This gives us this much:
enter image description here
And now the 2s are completed; the unshaded cell on the left must be grabbed by the 3, so we can complete that too.
enter image description here

Next,

The 4 at the top right can't join up with the unshaded region close to it, so we need to put a wall between them.
enter image description here
The big clump of shaded cells that have already been placed can't be blocked off -- so the isolated unshaded cell must go with the 7.
enter image description here

And finally, making sure rooms don't touch:

we can close off the 4 room, then the 7 room, and then...
enter image description here
...by counting hexes, we have to shade one more cell.

And the puzzle is solved! The solution:

enter image description here

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    $\begingroup$ Very good! I hadn't made any Nurikabe puzzles before, but I've been thinking about using this different grid system for a while. I hope it was enjoyable! $\endgroup$
    – Matthew Jensen
    Nov 29, 2020 at 23:13
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    $\begingroup$ @MatthewJensen It was! Not too difficult, but it was neat to see how the hex grid affected region shapes. $\endgroup$
    – Deusovi ♦
    Nov 29, 2020 at 23:21

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