May 26, 2010

Friday Puzzles #50

So writing a Yajilin puzzle with symmetry gives you all sorts of issues with uniqueness and stuff. Good luck to anyone in the hunt for a symmetric 10×10 with just the four givens! Still, I gave it – symmetry in general that is – my best shot with this one, and I only just failed. Enjoy!

#060 Yajilin – rated medium

All puzzles © Tom Collyer 2009-10


- 3 comments by 1 or more people Not publicly viewable

  1. Jonah

    Just checking: there are three solutions, right?

    26 May 2010, 22:41

  2. Whoops – that bottom right 1 should be a two – ah now that’s a kicker for the symmetry. OK – I’ll fix it…

    26 May 2010, 22:56

  3. OK fixed – thanks for pointing that out :)

    26 May 2010, 23:00


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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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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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