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November 05, 2010

Friday Puzzles #77

Greetings all – just a quick update this week. The first two puzzles are taken directly from the instructions of the imminent UKPA Sudoku Championship. Please note that the second link takes you to a groovy new tournament page.

#098 Irregular Sudoku – rated easy

#099 Touchy Sudoku – rated medium

Please refer to the puzzle examples section of the instructions linked above to refer to the rules. I can’t really be bothered to copy and paste them here! You’ll also have the novelty of finding the solutions there too!

For my 100th published puzzle, I’ve decided to let myself go a bit. Yup, another twisted symmetry 10×10 masyu – but I reckon this one is probably harder than last week’s offering. Rest assured that I’m going to stick to my guns on this and still call it a medium – just! I am particular pleased that almost by accident I stumbled upon a way of implementing the sort of non-trivial global logic I’ve wanted to put into a puzzle of this size for a long while now. The finishing move is pretty subtle as well, but no less cool for being so. Enjoy!

#100 Masyu – rated medium

All puzzles © Tom Collyer 2009-10

: 05 Nov 2010 12:32 | Tags: Friday Puzzles Irregular Sudoku Masyu Sudoku Variants Touch Sudoku | Comments (3) | Close comments | Report a problem

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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:
Akari – Fillomino – Hashi – Heyawake – Hitori – Kakuro – LITS – Masyu – Numberlink – Nurikabe – Ripple Effect – Shikaku – Slitherlink – Sudoku – Suraromu – Yajilin.

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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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Puzzles published on this blog are licensed under a Creative Commons Attribution-Noncommercial-Share Alike 3.0 Unported License. Please leave a comment or send an email for more information.