Which technique to use here?

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Which technique to use here?

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


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?

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Re: Which technique to use here?

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

Look for a Unique Rectangle (type 2).
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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.
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