It can help you if you will study these types of techniques.
You´ll be able to solve better the Jigsaw sudoku and Untouchable sudoku.
In this picture you can find how this technique works. It´s based on the innies and outies technique.
In this puzzle the solution is R9C7 = 5. You can find more in the links.
This image is copied from http://www.sudopedia.org
Or you can find it here:
Law of leftovers 2
Law of leftovers 3
If you want to see the Pairs puzzle solving, you can look at the Chinese sites even if the text is in Chinese and you can watch only the pictures.
Pairs in chinese 1
Pairs in chinese 2
This image is copied from http://www.sudokufans.org.cn
If you want to see the Mathdoku puzzle solving, you can look at the Chinese sites even if the text is in Chinese and you can watch only the pictures.
Mathdoku
This image is copied from http://www.sudopedia.org
If you want to see the Concentration Game puzzle solving, you can look at the Chinese sites even if the text is in Chinese and you can watch only the pictures.
This image is copied from http://www.sudokufans.org.cn