Puzzle 107 (Nurikabe)

This is a Sunday Nurikabe puzzle.

Puzzle 106

The theme is possible to miss. If you finish and don’t find it, ask yourself: which number in the puzzle is special? For extra credit, why are they in that layout?

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8 Responses to “Puzzle 107 (Nurikabe)”

1. Alan Curry Says:

I was about to answer “the large numebrs were most useful, as usual in nurikabe”. Then I remembered how I ended the puzzle on a smaller island with an unexpected shape. Could that shape have been included on purpose? Yes! It was the U of FILNPTUVWXYZ. Or, in the order in which the clues appear reading left-to-right on each row and top-to-bottom overall: IPYVXLWZFTNU. Guess I missed the extra credit since that ordering doesn’t look meaningful to me.

2. MellowMelon Says:

That unexpectedly shaped island was definitely on purpose; it was tough as nails to force it. The 5 has to go in that middle square or you can’t possibly make a unique solution.

As for the extra credit, you might have to move them around a little. It doesn’t have to do with the letters directly.

3. Alan Curry Says:

Ah, it’s like a packing problem that has experienced some continental drift. Cute. All that and still a good nurikabe too.

4. mathgrant Says:

Holy crap, that’s an amazing theme, albeit a highly intellectual one that’s very easy to overlook. Solomon Golomb would be proud.

5. MellowMelon Says:

I figured it was easy to overlook, which is why I put the hint down. Also thought a theme like this one was fitting for the first Sunday puzzle, which I’m hoping to make more unorthodox in comparison to the Friday and Saturday puzzles.

6. TheSubro Says:

Good Nurikabe. Got the theme (wouldnt have seen it without the comments).

Query:Nurikabe’s rule is that “all the black cells form one contiguous region, not counting squares touching at a corner to be adjacent” I think I have seen this interpreted in different ways:
a. No islands (regions of unfilled cells completely surrounded black cells) are allowed … such as a few of the 1s in your puzzle.
b. The term contiguous allows for surrounding an “island”

The reason I ask is that one can often use this rule to one’s advantage when completing a Nurikabe puzzle, and I wanted to know your take on it.

Thanks for this artistic Nurikabe

Ken

• TheSubro Says:

I just popped on the Nikoli site and realize that their example includes a one space isalnd. Seems okay in their book I guess. Not sure why, but I do not recall seeing that as allowed elsewhere.

“Never mind.”

7. wartysoybean Says:

Wonderful puzzle. The ending was especially impressive, at first I thought I had miscounted, because the shape is so un-Nurikabe, I guess.

The theme is extremely cool, but the extra credit is just mind-blowing. You are a puzzle writing genius, your control over the solution is frightening. I hope this took you a loooooong time to write š