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how to solve tough sudoku def is_valid(board, row, col, num): for x in range(9): if board[row][x] == num or board[x][col] == num: return False start_row, start_col = 3 * (row // 3), 3 * (col // 3) for i in range(3): for j in range(3): if board[i + start_row][j + start_col] == num: return False return True def solve_sudoku(board): for i in range(9): for j in range(9): if board[i][j] == 0: for num in range(1, 10): if is_valid(board, i, j, num): board[i][j] = num if solve_sudoku(board): return True board[i][j] = 0 return False return True Solving the Puzzle: Finally, we can integrate the functions to solve a given Sudoku puzzle. Start with Basic Strategies: Begin by using basic Sudoku-solving techniques, such as single candidate, naked pairs, and hidden pairs. binary sudokuis sudoku good for brain If these boxes are the only ones in their respective rows or columns with these numbers, you can eliminate those numbers from other boxes in the same rows or columns. vita sudoku Use the process of elimination: If a row, column, or subgrid has only one possible number that can be placed in an empty cell, fill it in.
