Sudoku FlowSudoku technique lessons / Hidden Pair
Lesson 9
Hidden Pair
The rule
Two numbers whose candidates together appear in only two cells of a row, column, or box claim those cells for themselves.
Step by step
- In this row, 4, 8 appear as candidates only in these two cells.
- These two cells must contain 4, 8 between them, so we can remove any other candidates from those cells.
Try it on more boards
Each board is a real puzzle from our app, at a moment where Hidden Pair applies. Find the step yourself, or tap Hint and the app's own hint walks you through it.
Want more boards like this?
We also make a Sudoku app for iPhone, iPad, Mac and Android. There are no ads in it at all, it works offline, and when you ask for a hint it shows you the technique instead of just filling in a number.
Sudoku Flow is made by Rubigo Games, the developer of the Sudoku app recommended on this site.