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sat 28 may ,next logical step?

 
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dro
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PostPosted: Tue Aug 02, 2005 10:27 am    Post subject: sat 28 may ,next logical step? Reply with quote
got as far as
x3x2xx781
xx8xxx3x4
x74x3x96x
xxx18x6x7
x176x9x38
8xx375149
x41x6x89x
7xxxxx41x
98x413x7x
finished it by guessing/trial&eror.interested in logical solution,not guesswork.hint on draw suggested a 7 below the 2 in the top middle cell as the next logical step.HOW????save my sanity please.
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pierceedd



Joined: 22 Jul 2005
Posts: 7
Location: New Jersey, USA
PostPosted: Tue Aug 02, 2005 1:57 pm    Post subject: Re: sat 28 may ,next logical step? Reply with quote
dro wrote:
got as far as
x3x2xx781
xx8xxx3x4
x74x3x96x
xxx18x6x7
x176x9x38
8xx375149
x41x6x89x
7xxxxx41x
98x413x7x
finished it by guessing/trial&eror.interested in logical solution,not guesswork.hint on draw suggested a 7 below the 2 in the top middle cell as the next logical step.HOW????save my sanity please.


The key to getting that 7 in the top middle cell lies in the first column (strangely enough). There are only two places you can get a 6 in the first column: the top box and the one under it. As a result, there MUST be a 6 in one of those two boxes, which means that there cannot be a 6 anywhere else in the top left cell.

As a result, the second box in the second row only has the possible numbers 2,5, and 9. This creates a triplet with the fifth box in the second row (5 and 9), and the eighth box in the second row (2 and 5). That triplet means that there cannot be a 5 or 9 in the fourth box, which leaves 7 as the only possible number for that box.

John
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guest
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PostPosted: Sat Feb 18, 2006 12:45 pm    Post subject: Reply with quote
Well, you didn't tell me what are these numbers and deleted my post, thats bad.
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