Friday Puzzles #97
So something very curious happened this week. This puzzle appeared on nikoli.com.
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 relates 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!
All puzzles © Tom Collyer 2009-11