Which technique to use here?

Post the puzzle or solving technique that's causing you trouble and someone will help

Which technique to use here?

Postby Chris783 » Fri Oct 07, 2016 12:39 am

Hello,

I think I've got problems spotting more advanced techniques (x wing, skyscraper, etc.) which I only read about recently.
How about the attached one - do I overlook sth. obvious or do I need a technique beyond naked double etc.?
If so, wich one?

Thanks,
Chris
Attachments
sudoku.png
sudoku.png (182.44 KiB) Viewed 945 times
Chris783
 
Posts: 1
Joined: 07 October 2016

Re: Which technique to use here?

Postby JasonLion » Fri Oct 07, 2016 3:36 am

Look for a Unique Rectangle (type 2).
User avatar
JasonLion
2017 Supporter
 
Posts: 642
Joined: 25 October 2007
Location: Silver Spring, MD, USA

Re: Which technique to use here?

Postby JC Van Hay » Fri Oct 07, 2016 7:39 am

6 candidates for the digit 4 are excluded by the only one solution of the digit 4.
JC Van Hay
 
Posts: 719
Joined: 22 May 2010


Return to Help with puzzles and solving techniques