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world sudoku champion 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. pronounce sudoku However, it wasn't until the 20th century that the modern version of Sudoku was created by Howard Garns, an American architect. sudoku wall street journal Experiment with the XY-Wing Technique: The XY-Wing is a sophisticated strategy that involves three cells, each with two possible candidates.
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