USA TODAY Sudoku and Variants Super Challenge: 200 Puzzles

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 Sudoku variants, such as Sudoku X and Sudoku mini puzzles.. USA TODAY Sudoku and Variants is a collection featuring Sudoku puzzles in four difficulty levels from USA TODAY - the nation's no. 1 newspaper, plus Sudoku X and Sudoku mini puzzles to round out the collection.. Features include:Introductory how-to section200 total Sudoku puzzlesComprehensive answer key