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explain x wing in 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. fall sudoku expert Sudoku 9 was inspired by a Latin square, a mathematical grid where each number from 1 to 9 appears exactly once in each row, column, and diagonal. crazy dad sudoku The Unique Structure of NY Times Sudoku What sets NY Times Sudoku apart from other puzzles is its unique structure.
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