From the original publisher of daily sudokus in the U.S., USA TODAY presents 200 all-new sudoku puzzle challenges in 5 difficulty levels. From the original publisher of daily sudokus in the U.S., USA TODAY presents 200 all-new sudoku puzzle challenges in 5 difficulty levels. USA TODAY Sudoku Super Challenge is a collection featuring 200 sudoku puzzles in five difficulty levels from USA TODAY —the nation's newspaper. Features include: Introductory how-to section 200 9 x 9 sudoku puzzles Comprehensive answer key