Hidden pairs are a powerful Sudoku solving technique that can help eliminate candidates and reveal the correct numbers.
What Are Hidden Pairs?
Hidden pairs occur when two numbers can only appear in two specific cells within a row, column, or box.
How to Find Hidden Pairs
Look for two numbers that appear as candidates in exactly the same two cells within a unit.
Using Hidden Pairs
Once found, you can eliminate other candidates from those two cells, leaving only the hidden pair numbers.