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sudoku blank grid If the two numbers are shared between the cells, you can eliminate that number from other cells in the same row, column, or box. printable sudoku and answers 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. Origins of El Pais Sudoku: El Pais Sudoku, also known as Spanish Sudoku, was introduced by the Spanish newspaper El Pais in 2004. large print sudoku bookprintable sudoku medium level Utilize X-Wing and Swordfish Patterns: X-Wing and Swordfish are advanced strategies that involve identifying patterns in rows or columns. This technique is known as "naked single" and is a great way to start solving Sudoku puzzles. sudoku 16x16 online
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