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brain training sudoku 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. sudoku medium answers Enter Sudoku online solver – a powerful tool that can help you solve even the most challenging puzzles. Step 2: Start with the Easy Pencil Marks When you begin solving a Sudoku puzzle, it's a good idea to pencil in all of the possible numbers for each empty cell. sudoku medium answerschicago sun times sudoku Tips for Improving Your Sudoku Skills Practice Regularly : Like any skill, regular practice will improve your Sudoku-solving abilities.
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