Nurikabe by Tom Collyer

Nurikabe by Tom Collyer


or solve online (using our beta test of Penpa-Edit tools)

Theme: 37 Strong

Author/Opus: This is the 21st puzzle from our contributing puzzlemaster Tom Collyer.

Rules: Standard Nurikabe rules.

Answer String: Enter the length in cells of each of the black segments (the unnumbered, connected “ocean”) from left to right for the marked rows, starting at the top. Separate each row’s entry from the next with a comma.

Time Standards (highlight to view): Grandmaster = 0:50, Master = 1:30, Expert = 3:00

Solution: PDF

Note: Follow this link for other classic Nurikabe. If you are new to this puzzle type, here are our easiest Nurikabes to get started on.

  • Jack Bross says:

    Solved as much by “I see what I’m pretty sure you did there … yep, that’s what you did there” as by rigorous logic.

  • skynet says:

    4:23.A 9X9 or a 10×10? seems a better theme for this 🙂

  • chaotic_iak says:

    00:29. Having created a similar puzzle just recently made me score this time. Oops.

    (On a very related note, I hear Prasanna also scored 29 seconds. Whoa.)

    I haven’t proven uniqueness though; that seems to be the meaty part of the puzzle. 😛 Nicely done.

  • Avatar photo Tom Collyer says:

    Hah, yes, proving uniqueness is a little more challenging. I do like puzzles where you can do by feel, but I would advise everyone that every now and again I throw a spanner in the works of what “feels” like the nice solution 😉

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