Naked Pairs

How It Works

When two cells in the same row, column, or box contain exactly the same two candidates (and no others), those two numbers must go in those two cells. You can eliminate those two numbers from all other cells in that group.

Step by Step

1. Find two cells in the same group with exactly two identical candidates.
2. These two numbers are locked to those two cells.
3. Remove those two candidates from all other cells in the same group.