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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. word sudoku onlinedaily samurai sudoku Look for rows, columns, or subgrids where a certain number cannot go because it is already present in another cell. X-Wing and Swordfish Techniques For those who have mastered the basic techniques like single-digit elimination and naked pairs, X-Wing and Swordfish are the next steps towards expert-level solving. sudoku swordfish strategy
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