Sudoku

Sudoku

Learn, Play and Create

Wikipedia on Sudoku

History of the game and listing of newspapers.

Sudoku Games

AllSudoku.com: Sudoku Games and Tools for Beginner or Obsessed. Features include email a game to a friend. Includes daily feed of new games and four levels of games to play.

Flash Tutorial for Beginners

If you've never played, this is a fairly good tutorial about how to play the game. From one of the biggest Japanese publishers of Sudoku books.

Let's Make Sudoku

If you really like playing, then creating Sudoku is then next step. Consider it more productive time than doodling.

Hamster Sudoku

Mashup of Flickr hamsters and Sudoku. Goofy fun.

The Math of Sudoku

Unwed Numbers

Consider this article in American Scientist Online as an introduction to the mathematics of Sudoku. Starting with three pages on the history of Sudoku, the article has four pages on Sudoku as a computational problem. These sections are "Counting Solutions", "NP or Not NP, That Is the Question", "Logic Rules" and "A Satisfied Mind". Short bibliography to more academic papers at end.

6670903752021072936960 Sudokus

Programs and link to article (.pdf) determining the number of possible grids.