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Sep 13, 2007

Sudoku - "Durhamite"


I made this Durhamite sudoku while on vacation in bloody hot Phoenix last month.  It solves like any other Sudoku but with letters instead of numbers.  If you're one of the three living Americans who doesn't know how Sudoku puzzles work, go here.

Click below for printable PDFs:

Download Durhamite Sudoku Puzzle - Easy.pdf

Download Durhamite Sudoku Answer.pdf

09:19 PM in Destination Durham | Permalink


Did you handcraft it?? Or was there software involved? You rock, Phil.

Posted by: Stew | Sep 13, 2007 10:28:52 PM

Handcrafted, thank you!

I used to enjoy game/puzzles a bit when I was young (I had a subscription to Games magazine, I think) but never more than dabbled in making them. The CRAFT is a fun part, for sure -- making the puzzle pieces, pictures, etc. along with the logic. Back in 1999 I created a half-day Skulduggery event which involved lots and lots of fun puzzle making with riddles and activities all over downtown Durham. Other friends had created similar activities in Chapel Hill and Durham, and two have even figured out how to get hired to make these things for other people's special events.

When I was traveling with my folks in Arizona, my mom mentioned that she tried doing Sudokus to keep her brain active, but that she wasn't having much success. So I figured I'd make her some more easy ones, just for the fun of it. I wondered if I could make some 9x9s, and it took maybe 15 minutes to figure out an algorithm that would work. I'm sure there are many algorithms, but I only worked out one. (BTW, it took about as long to come up with an interesting nine-letter word without repeating characters.)

What I *haven't* done is figured out algorithms for knowing when a puzzle is solvable and/or unique. I'm sure they exist, and I'm fairly sure I wouldn't be able to derive them.

But it's nice to hang out with puzzle people. I mentioned the other Skulduggery authors. That same friend set includes the guy who makes a living with this great game site: www.itsyourturn.com. And my first-ever girlfriend (who was also my second-ever girlfriend) surprised me later in life by having one of her crossword puzzles published in the New York Times.

I like hanging out with accomplished amateurs.

Posted by: Phil | Sep 13, 2007 10:49:04 PM

Will sodoku make me smart?

Posted by: David | Sep 14, 2007 8:43:30 AM

Fun! It is solvable. :)

Posted by: Valerie | Sep 15, 2007 12:08:51 AM