Every day, tens of millions of sudoku fans get out their pencils and attack the latest 9x9 puzzle in their daily newspaper. But a huge percentage of those fans

From the original publisher of daily Sudokus in the United States, USA TODAY presents a collection of Sudoku puzzles in four difficulty levels, along with fun S

These popular logic puzzles from Japan are taking the world by storm. Sudoku looks like arithmetic but requires just logic. While the rules are simple, the solu

Everyone knows sudoku is enjoyable--but these addictive puzzles come in endless variations too! They range from simple to very difficult, and can take almost no

Sudokus are extremely satisfying and enjoyable number-placement puzzles that give our brains a great workout. This brilliant collection is graded by level of di