Sudoku Tips: Naked Pair Explained (With Easy Examples)

Getting stuck in Sudoku even when the board looks almost complete?

You’re probably missing one of the most important basic techniques: Naked Pair.

This simple but powerful strategy can unlock puzzles that seem impossible at first glance.

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What is a Naked Pair?

A Naked Pair occurs when:

• Two cells in the same row, column, or 3×3 box
• Contain exactly the same two candidates

Example:

• Cell A → (2, 7)
• Cell B → (2, 7)

👉 These two numbers must go in those two cells — no other options.

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Why is Naked Pair Important?

Because it allows you to eliminate candidates from other cells.

If two numbers are locked in two cells, they cannot appear anywhere else in that unit.

This often reveals new singles and helps you move forward.

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Easy Example

Imagine a row like this:

Cell	Candidates
A	2, 7
B	2, 7
C	2, 5, 7
D	1, 7

Step 1: Identify the pair

Cells A and B both contain (2, 7) → Naked Pair found.

Step 2: Eliminate from others

Remove 2 and 7 from all other cells in the row.

So:

• Cell C → becomes (5) ✅
• Cell D → becomes (1) or simplified

👉 Now you’ve created new solving opportunities.

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How to Spot Naked Pairs Faster

Here are some quick tips:

• Scan rows, columns, and boxes for cells with only 2 candidates
• Look for identical pairs
• Focus on crowded areas of the puzzle

💡 Pro tip: Naked Pairs often appear when the puzzle starts getting tighter.

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Common Mistakes

❌ Mistake 1: Using cells with more than 2 candidates

A Naked Pair must have exactly two numbers.

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❌ Mistake 2: Not in the same unit

Both cells must be in the same:

• row, OR
• column, OR
• box

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❌ Mistake 3: Forgetting to eliminate

Finding the pair is not enough —
you must remove those numbers from other cells.

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Practice This Technique

The best way to master Naked Pair is to try it yourself.

👉 Open a puzzle and look for:

• Cells with only 2 candidates
• Matching pairs

If you're not sure, you can use a Hint feature to see when this technique applies.

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When Should You Use Naked Pair?

Use it when:

• No obvious singles are left
• The puzzle feels “stuck”
• You see multiple cells with 2 candidates

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Final Thoughts

Naked Pair is one of the first “real” Sudoku techniques that separates beginners from improving players.

Once you start spotting it naturally, your solving speed will increase dramatically.

Keep practicing — and soon, these patterns will jump out at you instantly.