Proposed preprocessing #20
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changed def fix_tuples(tuples) for def fix_tuples(open_tuples)
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Preprocess a Sudoku puzzle from py-sudoku. Includes
pre_tuples: Extracts tuples from pre-filled cells in the Sudoku grid.
find_open_tuples: Identifies open cells and calculates potential values for each, considering row, column, and subgrid constraints.
fix_tuples: Filters out cells with a unique possible value from the list of open tuples.
preprocess: Iteratively fills cells with unique values and updates the puzzle state until no trivially solvable cells remain.
It also includes an example code.