Friday 25 March 2011

Friday Puzzles #97

So something very curious happened this week. This puzzle appeared on
My unquestionably loyal readers will doubtlessly recall this puzzle as featuring on this very blog back in July 2010:
You don’t need to know what a dihedral group is to recognise that these puzzles are related by a reflection in the bottom-left/top-right diagonal. I don’t want to go into this too much on the blog – I have initiated a discussion here – but suffice to say I think this is a rather eye-opening coincidence (rather than malicious plagiarism) based on the fact that actually Masyu with twisted symmetry are very highly constrained, and the creative puzzle author might put down the initial diagonal pattern and then finish off the puzzle in exactly the same way as I did.

Anyway, I’m still a little unsure as to what to make of it all, so please feel free to leave a comment either here or in the forum thread.

And so to business. This week’s puzzle is inevitably a Masyu with twisted symmetry. The solve is nothing special, but I hope you’ll agree the design is at least a little striking. Enjoy!
    #123 Masyu – rated easy
All puzzles © Tom Collyer 2009-11

Friday 18 March 2011

Friday Puzzles #96

This week’s puzzle will be slightly delayed due to a slight hitch in the uploading process…more soon…


So back down to earth this week. I didn’t have access to my laptop earlier, but thankfully I was able to quickly cook up an inkscape template and save it directly to the right directory. Marvellous. Anyway, this puzzle isn’t so hard I don’t think, but you’ll want to watch your step. Did I already do a “4” themed Heyawake? If so never mind. Enjoy!
    #122 Heyawake – rated medium
All puzzles © Tom Collyer 2009-11

Friday 11 March 2011

Friday Puzzles #95

    #121 Masyu – rated hard
All puzzles © Tom Collyer 2009-11

P.S. you lose if you use uniqueness strategies. That is all.

Friday 4 March 2011

Friday Puzzles #94

Don’t Masyu look so much better with a nice bit of symmetry!? This week’s puzzle would probably count as a medium if it were 10×10 rather than 18×10 – but perhaps that’s only because I don’t believe you can have a hard 10×10 Masyu. I’d say it’s definitely hard by standards. Included in this puzzle is a twist on an old chestnut, which nevertheless I haven’t seen before. Maybe I’ll send it to 11 some other time. Still, I reckon this puzzle isn’t so bad either. Enjoy!
    #120 Masyu – rated medium
All puzzles © Tom Collyer 2009-11

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