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evil 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. what to do when stuck in sudoku This involves temporarily placing a number in a cell, then removing it if it leads to a contradiction. sudoku online hard Unique Rectangle and Pointing Pair: Unique Rectangle and Pointing Pair are techniques that involve identifying rectangles or pairs of cells that can only contain two numbers. what to do when stuck in sudoku With its unique name and engaging gameplay, Sudoku continues to captivate puzzle lovers around the world.
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