how to solve this?? please help

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how to solve this?? please help

Postby kartikarg » Thu Aug 25, 2016 1:06 pm

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Re: how to solve this?? please help

Postby JasonLion » Thu Aug 25, 2016 8:27 pm

Look for a unique rectangle type 1. More information on unique rectangles here.

After that it is singles to the end.
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Re: how to solve this?? please help

Postby nedBlake » Sun Oct 23, 2016 2:12 pm

7 in (8,5) must be a solution. If not, then a simple X chain tells you that the 7 in (6,1) and (6,5) both would be solutions which can't happen.
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Re: how to solve this?? please help

Postby docjohn » Fri Dec 02, 2016 12:32 am

There's a skyscraper of 7's.
Look at the 7's in these squares:

r4c2 r4c6
r7c1 r7c6

so either r4c2 or r7c1 must be a 7

This will eliminate the 7's in r6c1 and r8c2
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