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Chapter 1: What is Sudoku?. : History of Sudoku. - Rules of Sudoku. - It is just logic! - The mathematics of Sudoku. - Variants of Sudoku. - Levels of difficulties. - Let's play Sudoku.
When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.