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The structure of a Sudoku puzzle instance (left), and its solution (right). | Download Scientific Diagram
The Super Sudoku Book For Smart Kids: A Collection Of Over 200 Sudoku Puzzles Including 4x4's, 6x6's, 8x8's, and 9x9's That Range In Difficulty From Easy To Hard!: Guido, Zack: 9781950601035: Amazon.com: