February 26, 2010

Friday Puzzles #33

What’s this!? A Friday Puzzle with out a ton of baggage being thrown out of the pram? And didn’t I promise you some more sudoku puzzles in preparation for the 2nd round of the UK’s online WSC qualifier? Well I did round 1 in an unspectacular time, and was informed the much bigger second round has to be done by Sunday. I can’t be arsed to churn out an entire two hours test worth of sudoku in a week. I should probably get on that soon, because I’ve just realised there’s potentially a fairly easy way to sabotage the efforts of someone you don’t like much.

Besides, you are probably bored of sudoku now anyway? I don’t blame you. Here’s a pretty hard Nurikabe instead. I should probably warn you at this stage that in trying to focus on the visual clock-face aspect of the puzzle, the quality of the solve began to suffer. Not that it’s not bad or anything, but it definitely falls short of perfection. Errr…I mean, enjoy!

#039 Nurikabe – rated hard

[Click for a bigger image]

All puzzles © Tom Collyer 2009-10


- 2 comments by 1 or more people Not publicly viewable

  1. MellowMelon

    I didn’t think the solve was bad or anything. I thought it was nifty how once you got the top center you would think “it would be really nice if the black cells on the right side were forced to escape through the top row,” and it was such a rewarding feeling to finally force that to happen considering that doing so is fairly hard.

    27 Feb 2010, 17:57

  2. Maybe I was being too ambitious, but initially I was going for a round the clock solve – whereas the finished article jumped around the puzzle a bit. I was quite pleased with how the middle of the clock was forced though. I can’t tell you how much pain I had in getting the top row to sort itself out uniquely!

    28 Feb 2010, 16:00


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Welcome to the blog of current UKPA sudoku champion, two-time Times national sudoku champion and general logic puzzle fan Tom Collyer.



Home of the original Friday Puzzles, each Friday I publish a 100% original and handmade logic puzzle, inspired by the world-famous Nikoli company.


How to play:
AkariFillominoHashiHeyawakeHitoriKakuroLITSMasyuNumberlinkNurikabeRipple EffectShikakuSlitherlinkSudokuSuraromuYajilin.

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