Web Sudoku is a sudoku website which was rated as one of the best 50 fun and games website by Time.[1] It was founded by Gideon Greenspan and Rachel Lee.[2] The website was rated as the 7265th best website in the world by Jonathan Harchick in his book The World's Best Websites.[3] In 2006, Greenspan claimed that about three million people play on the site, adding that the numbers "are still growing very rapidly from week to week".[4] He added that some of the players solve dozens of puzzles every day.[4]