Sudoku Flow
Sudoku technique lessons / Hidden Triple
Lesson 11

Hidden Triple

The rule

Three numbers whose candidates together appear in only three cells of a row, column, or box claim those cells for themselves.

Step by step

  1. In this row, 2, 3, 8 appear as candidates only in these three cells.
  2. These three cells must contain 2, 3, 8 among them, so we can remove any other candidates from those cells.
Read the full lesson, with more examples →

Try it on more boards

Each board is a real puzzle from our app, at a moment where Hidden Triple applies. Find the step yourself, or tap Hint and the app's own hint walks you through it.

Sudoku app icon

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.

App StoreiPhone, iPad, Mac Google PlayAndroid

Sudoku Flow is made by Rubigo Games, the developer of the Sudoku app recommended on this site.