I do sudokus all the time too. I use the books to pass the time in the van when I am waiting for kids at schools, or do them while sitting with the kids at naptime waiting for them to all drop off to sleep. I've even got my daughter started on them, though she doesn't do them as often (she's 9 and going into 4th grade math) and she has a harder time with the 9s, she prefers the 4s and 6s. I like that conceptis site as well because not all of the weekly puzzles are 9s, there are some variations.

Yep!

I'm completely addicted. I usually do the LA Times puzzle every day. Generally it's in bed and I fall asleep before I finish. It's the same numbers in those same little squares every single time but totally satisfying, even when I don't finish.

Oh, thank you sooooooo much !!

I downloaded the sudoku game and now I'm going to have to register it, cos just 28 days trial isn't enough ! :D

websudoku.com and sudokucombat.com are the 2 i play all the time... both free, both offer pencilmarks, and both are super fun :)

I highly recommend the websudoku site that K listed above -- the only problem is that the notations are hard to make online, especially when you have a lot of options in one square initially. However, you can print them in LARGE format, which makes it much nicer to solve.

The other site which has a REALLY nice java sudoku is on www.dailynews.com/coffeebreak . It is easy to make notations pressing the shift button, and it tells you when you are putting in an accidental duplicate number in the same square/row/column. The Monday-Thursday listings are usually easy, and the Fri-Sun listings are usually in the harder categories.

They are logic puzzles, there is absolutely no math required.

I found the awesomest Su Doku strategy site. If you want to learn a cool way to play... Click me.
:)

I just assumed that everybody did it roughly that way until Lani started doing them. She says it isn't fun to do it my way.

To me the challenge of Sudoku is not logic but record keeping. That is, the logical calculations are easy, it is just difficult to accurately track what you know about the puzzle. Solve the record-keeping problem and most of the puzzles I've done are relatively easy with the time requirement coming from the endless iterations of the same two or three logical calcuations.

The problem is that many of the online Sudoku sites don't easily allow you to do such notekeeping on the computer screen. The Sudoku puzzles at ConceptisPuzzles (linked above as Steph's preserred site) do allow it though the interface is a little clunky.

Damn this thread!

I had never bothered to take up sudoku, but after reading this thread I did.

The evil level (on websudoku) is challenging enough to keep me interested, but if I make one clerical error it kills me and really pisses me off when I can't do it fast enough.

I can't do them online - I have to print them out.