Sudoku FlowSudoku technique lessons / Pointing Pair
Lesson 5
Pointing Pair
The rule
If a number in a box can only go on one line, that candidate is removed from the rest of that line outside the box.
Step by step
- In this box, every cell where 5 can still go lies in the same row.
- So we can remove the candidate 5 wherever it appears in that row outside this box.
Try it on more boards
Each board is a real puzzle from our app, at a moment where Pointing 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.