Sudoku strategy
Naked Singles Sudoku Strategy
Beginner technique Beginner
A naked single is an empty cell with only one legal candidate left after checking its row, column, and box.
How to use it
- Choose one empty cell.
- Remove every digit already used in the same row, column, and 3x3 box.
- If one digit remains, place it.
- Repeat after every placement because new singles often appear immediately.
Practice: Start with an Easy puzzle and enable auto-update candidates to see naked singles appear as you solve.
Practice this strategy
Use the interactive solver to practice this technique on a fresh puzzle. If you get stuck, the Human Solve mode can show the next logical step.