January 27, 2012

Friday Puzzles #141

Why would you not enjoy putting numbers into a grid? I think this one has sent me slightly mad. If you get this in under 10 minutes I’ll be impressed. If you get it in under 5 then I may have to hunt you down and kill you. Enjoy!

#172 Ripple Effect – rated hard

[blockquote mark-up still apparently not working]

All puzzles © Tom Collyer 2009-12


- 6 comments by 1 or more people Not publicly viewable

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  1. Bram

    Very Nice. I enjoyed that one. It helped me that I had used a similar opening in one of my puzzles as well.

    27 Jan 2012, 21:57

  2. Thomas Snyder

    In between the targets, but a bit closer to 10 minutes than to 5 so I don’t think I’ll need to be retaining additional security at the moment. I liked the challenge. While the context was certainly different, the logic reminded me of something I discovered with the habanero Ripple Effect from Puzzle Tokyo. Was that a similar inspiration here as it was with an earlier Yajilin?

    28 Jan 2012, 01:46

  3. Kota

    Very nice puzzle! I am going to leave a comment below as a member of PuzzleTokyo…
    To tell the truth, I did not think that I have should give puzzles ‘which were not made by myself’ in spite of the authors’ zeal.
    Two months passed since WPC and WSC. I feel relieved to see your reactions in blog and so on.
    Tom and Bram made Ripple Effect inspired by the habanero. We were amazed at your capacity. My friends were delightful that the puzzlers in other countries solved their own puzzles.
    I wish my friends will see you in WPC or WSC

    28 Jan 2012, 12:49

  4. Well the pain I went through to get this puzzle working, and without getting the final steps to ruin the clever break-in, seems justified by these comments. I made quite a silly error, in pen, with the habenero ripple effect but I suppose that is the first time I saw that kind of logic, so yes you are right there Thomas.

    Kota – that newsletter was one of the highlights for me in Eger, and I’m very glad you enjoy my little spin-offs – and I’m especially pleased if the wonderfully creative people at Puzzle Tokyo think that my puzzles are any good! I’m definitely looking forward to more WPC/WSC’s – please bring more newsletters :)

    29 Jan 2012, 00:30

  5. Bryce Herdt

    About 20 minutes, after restarting from a mistaken conclusion.

    31 Jan 2012, 07:10

  6. Bram

    Kota, that’s not really true. I had made my puzzle before going to the WPC already. Also I don’t have the Puzzle Tokyo puzzles. I had seen people walking around with them, but haven’t solved any of them. I remember seeing Palmer with that Ripple Effect puzzle, but haven’t a clue how it solved.

    03 Feb 2012, 21:05


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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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Latest comments

  • I like the appearance of the solution. :P Nice one. by Prasanna Seshadri on this entry
  • I think I've seen something vaguely similar in some of Palmer's puzzles as well. To be honest I've a… by on this entry
  • That's two puzzles in a row where I find something I had used before. I know, not plagiarism; just g… by Bram on this entry
  • Kota, that's not really true. I had made my puzzle before going to the WPC already. Also I don't hav… by Bram on this entry
  • About 20 minutes, after restarting from a mistaken conclusion. by Bryce Herdt on this entry

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