Sudoku fans: Try these gnarly KenKen puzzles

A relatively easy 6x6 KenKen puzzle. Click puzzle to see a larger version, and click here to see solution.

(Credit: (c)2009 Gakken Co. Ltd. and TM Nextoy, LLC, used under license)

Sudoku can get pretty tough. But if you're looking for fresh pastures, KenKen puzzles offer a new challenge.

The only problem for me: The New York Times' online KenKen site offers only 6x6 puzzles.

However, Nextoy, the company that distributes KenKen puzzles outside Japan, has spruced up its official KenKen Web site with considerably larger sizes--7x7, 8x8, and 9x9. The sites use the same Flash-based interface as The New York Times' puzzles, which NextToy supplies.

Nextoy President Robert Fuhrer said the puzzles are updated daily. For now, each is of medium difficulty, though larger puzzles are harder in general.

If you're not familiar with the puzzles, I wrote a KenKen introduction earlier this month. Basically, they have some similarities to Sudoku, but require basic math as well as logic. I find them to be a better-rounded challenge than either Sudoku or Kakuro.

[Throgged]

ok honestly,
enough about the KENKEN!!!!

[apprageous]

Hey,

If you like Sudoku, you will love iKendu.

iKendu = Sudoku + Math

Click here <a href="http://ikendu.com">to check out iKendu</a>

iKendu is now available for the iPhone and iPod touch in the iTunes App Store.

Have fun!

[mmarinalobo27]

Lets create a world record for india. And now show the world how sharp we really are.just start solving blocks of the largest online puzzle ever created -100 blocks and 25000 pieces. But before you begin, do pour yourself a cup of Lipton Yellow Lable tea. The Natural Theanine in it will keep you sharp and ensure a good start go to stay-sharp.in

[mathmojo]

I don't think it's possible that things like KenKen and crosswords don't help your brain stay fit.

I've made a video about how to start solving a 9x9 KenKen in which the operation signs are not given.

You can check it out at:
http://mathmojo.com/chronicles/kenken/