Since 1980, Nikoli^{^} has been in the business of creating many different variations of logic puzzles (such as the very popular Sudoku and Kakuro). Unfortunately, as they're stationed in Tokyo, their magazine is unavailable to most Americans.

Luckily, over the decades they've inspired quite a few people to make their own puzzles and variants, including:

• The Art of Puzzles, by Thomas Snyder (updated weekly, plus bonuses)
• A Cleverly-Titled Logic Puzzle Blog, by Grant Fikes (updated several times a week)
• Melon's Puzzles, by Palmer Mebane (updated daily)
• Detuned Radio, by Tom Collyer (updated weekly)

posted by flatluigi on Feb 17, 2010 - 12 comments

Surviving Sudoku. Matt Gaffney, a crossword puzzle designer, examines the crossword community's ambivalent relationship with the phenomenally successful number puzzle. Meanwhile, it's high time to resurrect Done in Pen: The Poems of New York Times Puzzle Editor Will Shortz.
posted by staggernation on Aug 2, 2006 - 39 comments

It's Friday, waste some time: Iron Sudoku, a daily sudoku challenge from the makers of Babble. (Free) registration required.
posted by sellout on Mar 31, 2006 - 15 comments

For those who tire of the usual paper and pencil-based puzzle, try Websudoku.
posted by Rothko on Nov 10, 2005 - 42 comments

The puzzle that ate the world?! It's called Su Doku. It came from Japan. It's deceptively simple, but a brief tutorial reveals hidden depths. It's spreading like gangbusters through the puzzle-obsessed British public, where it is making major news and being rapidly added to the country's newspapers. Fortunately, archived puzzles and free software are out there to provide puzzle addicts their latest fix. C'mon... give it a try. It's only *one* little puzzle. (Heh, heh.)
posted by insomnia_lj on May 10, 2005 - 30 comments

Su Doku. Fill in the grid so that every row, every column, and every 3x3 box contains the digits 1 through 9. That's all there is to it. It doesn't sound like much, but it's as addictive as hell. The Times is one publication with a daily puzzle (may be unavailable to overseas readers.) There a tuturial and sample puzzle here (flash).
posted by salmacis on Dec 10, 2004 - 6 comments