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sudoku extremely hard Fill in the obvious numbers: Look for rows, columns, or boxes where a number can be placed based on the numbers already filled in. sudoku jigsaw def isValidSudoku(board): def is_valid(board, row, col, num): for i in range(9): if board[row][i] == num or board[i][col] == num: return False if board[3 * (row // 3) + i // 3][3 * (col // 3) + i % 3] == num: return False return True for i in range(9): for j in range(9): if board[i][j] != '.': if not is_valid(board, i, j, board[i][j]): return False return True Step 2: Test the function with a sample Sudoku grid. With its comprehensive content, step-by-step instructions, and varied difficulty levels, a Sudoku PDF guide is sure to help you become a Sudoku master in no time. sudoku jigsawsudoku box line reduction Start by filling in a blank cell with one of the possible numbers and move on to the next blank cell.
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