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Example Puzzles and Solutions
Sudoku: Level Hard 320 Puzzles: For Adult Puzzles With Solutions 9x9 grid size 8.5 x 11 161 pages matte finish (Paperback) - Walmart.com
7,000 Sudoku Puzzles Worksheet and Answers for Beginners Mind (9x9 grid)
Sudoku 9 x 9
Printable Sudoku Worksheets - 9 x 9 Sudoku Worksheet
Discovery could lead to more difficult Sudoku puzzles