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Here's how to identify and use them: Pairs: Look for rows, columns, or boxes where two cells have only two possible numbers left. hard sudoku nytimessudoku solver python code So, if you are looking to improve your puzzle-solving skills or simply pass the time, be sure to check out these top free Sudoku games. While the basic rules remain the same, Dell Sudoku introduces a new twist by incorporating the use of a 'dell' – a cluster of digits arranged in a specific pattern that must be solved in addition to completing the standard Sudoku grid. pi day sudoku answers
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