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def read_puzzle(puzzle_input): return [list(map(int, line.split())) for line in puzzle_input.split('\n')] Backtracking Algorithm: The core of our Sudoku solver is the backtracking algorithm, which is a depth-first search technique. world s toughest sudoku Strategies for Sudoku Skyscraper: Start by filling in the grid with numbers, following the traditional Sudoku rules. x wing sudoku explained
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