- To solve a difficult Sudoku puzzle, you can follow these steps12:
- Use a pencil to note potential candidates in open squares.
- Scan the board to process the puzzle.
- Start with the obvious singles.
- Revisit your candidates after you solve singles.
- Identify naked or hidden pairs.
- Move on to triples and quads.
- Identify patterns in the remaining numbers.
- Avoid trial and error – find a logical reason for entering each number.
- Look for rows, columns and 3×3 boxes with just a few blanks remaining.
- Try adding numbers which already appear often in the Sudoku puzzle.
- After entering a number, check to see where else it has to go.
- For trickier puzzles, click Options to turn on pencil marks.
Learn more:✕This summary was generated using AI based on multiple online sources. To view the original source information, use the "Learn more" links.How to Solve Hard Sudoku Puzzles
- Use a pencil. This may seem obvious to you, but some folks don’t do this! ...
- Note potential candidates in open squares. ...
- Scan the board to process the puzzle. ...
- Start with the obvious singles. ...
www.wikihow.com/Solve-Hard-Sudoku-Puzzles- Avoid trial and error – find a logical reason for entering each number.
- Look for rows, columns and 3×3 boxes with just a few blanks remaining.
- Try adding numbers which already appear often in the Sudoku puzzle.
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