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![An Example Sudoku Puzzle and its Solution [1 ] | Download Scientific Diagram](https://www.researchgate.net/profile/Paul-Roach-4/publication/264572573/figure/fig1/AS:295976259604480@1447577647208/An-Example-Sudoku-Puzzle-and-its-Solution-1.png "An Example Sudoku Puzzle and its Solution [1 ] | Download Scientific Diagram")