A pencil is a familiar tool when solving Sudoku on paper. But should you actually use a pencil when playing Sudoku? What are the pros and cons? Let’s find out!
When you first get into solving Sudoku puzzles on paper, one of the most common questions is:
“Should I use a pen or a pencil?”
Although this choice might seem simple, it can significantly affect your overall solving experience and outcome.
In this article, we’ll look at why pencils are often recommended for paper-based Sudoku, along with a few handy tips on how to use pencils effectively while playing.
Why is the pencil preferred for Sudoku?
Easy error correction
Sudoku is a logic-based puzzle that often requires trial and error, as well as eliminating possibilities. Sometimes, you might write the wrong number or follow an incorrect line of reasoning.
If you’re using a pen, correcting mistakes is difficult or even impossible.
With a pencil, on the other hand, you can simply erase and rewrite. It’s incredibly convenient.
Supports pencil marks and notations
At higher difficulty levels, players often need to jot down possible candidates for each cell (known as “pencil marks”).
Using a pencil allows you to easily add or remove these small notes without making the board messy.
Encourages confident experimentation
Knowing you can erase and retry helps you feel more confident exploring new solving strategies. This is especially helpful when you’re practicing or learning advanced Sudoku techniques.
Advantages and disadvantages of using pencil when playing sudoku
Advantages:
- Easy to erase mistakes cleanly
- Ideal for making multiple candidate notes in one cell
- Helps you track progress and adjust strategies
- Suitable for both beginners and experienced players
Disadvantages:
- Excessive erasing may damage or smudge the paper
- Pencil marks can fade if rubbed by hand
- Requires a good-quality pencil to avoid breaking or smudging
Tips for using a pencil effectively in Sudoku
- Use mechanical pencils or soft lead pencils (HB) for finer lines that are easier to erase.
- Use a high-quality eraser that doesn’t leave smudges or residue on the grid.
- Write candidate numbers in the corners of the cells, and only fill the center once you’re certain.
- Make light sketch marks if trying out multiple possibilities, and erase them as you narrow down the solution.
- Keep your paper clean by avoiding rubbing your hand over freshly written rows or columns.
When not to use a pencil
Despite its convenience, pencils may not be allowed in some official Sudoku competitions, where using a pen ensures fairness and legibility.
Additionally, if you’re training yourself to be more precise and deliberate from the start, using a pen may help you stay focused and careful.
That said, for most casual players and those practicing, a pencil remains the best option.
So, should you use a pencil when playing Sudoku on paper?
The answer is: Absolutely! Especially if you’re learning, practicing, or tackling tougher puzzles. A pencil gives you the flexibility to fix mistakes and refine your strategies as you go.
Get yourself a good pencil, a quality eraser, and start conquering those challenging Sudoku boards today!
Visit Game Sudoku Online to discover more tips and strategies to improve your game every day!
