How can I solve difficult Sudoku puzzles?
To solve difficult Sudoku puzzles, start by scanning the grid for obvious numbers, then use techniques like pencil marks.
What are pencil marks?
Pencil marks are small notations in the cells indicating possible numbers. They help you keep track of options.
Are there any specific strategies I should use?
Yes! Techniques like naked pairs, hidden singles, and box-line reduction can be very effective for tough puzzles.
How do I recognize a naked pair?
A naked pair occurs when two cells in a row, column, or box can only contain the same two numbers, allowing you to eliminate those numbers from other cells.
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