Ready to put the naked single technique into action? This page is designed for you to practice and master naked singles with real Sudoku puzzles.
Every board above is a position from a real puzzle where a Naked Single is the next step. Select the cell, press its digit (on the pad or your keyboard) and press Check. If you’re stuck, Show me gives the answer and Next puzzle loads another. Want to watch one first? Switch to Worked example.
Quick Reminder: What is a Naked Single?
A naked single occurs when a cell has only one possible candidate left. When you spot a naked single, you can confidently fill in that number.
Want a full step-by-step guide? Read the Naked Single technique article
How to Practice
- Scan the grid for any cell with only one candidate remaining.
- Select that cell and press its digit.
- Press Check. A wrong digit is underlined in red and you can try again.
Start Practicing on Full Puzzles
Once you can find Naked Singles on most boards without pressing Show me, take it into a full game. Easy puzzles are where this technique starts to come up, and the step-by-step solver will name the technique each time you get stuck.