Naked Single - The Most Fundamental Sudoku Technique

What is a Naked Single?

A Naked Single occurs when a cell has only one possible candidate number remaining after elimination. It's the most basic solving technique in Sudoku.

How to Find Them

1. Choose an empty cell 2. Check which numbers exist in the same row 3. Check which numbers exist in the same column 4. Check which numbers exist in the same 3x3 box 5. If only one number from 1-9 remains, it's confirmed

Tips for Efficiency

Focus on rows, columns, or boxes that already have many numbers filled in. The more numbers present, the fewer candidates remain, making Naked Singles easier to spot.