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Sept 5 nvh

 
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nataraj



Joined: 03 Aug 2007
Posts: 1048
Location: near Vienna, Austria

PostPosted: Wed Sep 05, 2007 6:15 am    Post subject: Sept 5 nvh Reply with quote

almost thought this one could be solved with just basic moves.
Just before the end - therefore very easy actually - two ways to go:xy wing or UR.
Both sove the puzzle immediately.
Only few cells left - can't miss the UR, xy wing a little harder to see.

not very hard IMHO.
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David



Joined: 02 Jun 2006
Posts: 58
Location: Bedford, UK

PostPosted: Wed Sep 05, 2007 8:01 am    Post subject: Reply with quote

Yes, fairly easy today. I didn't see any other options other than the Ur and xy wing either.
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TKiel



Joined: 22 Feb 2006
Posts: 292
Location: Kalamazoo, MI

PostPosted: Wed Sep 05, 2007 10:55 am    Post subject: Reply with quote

There was a W-wing that solved it too.
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Johan



Joined: 25 Jun 2007
Posts: 206
Location: Bornem Belgium

PostPosted: Wed Sep 05, 2007 11:19 am    Post subject: Reply with quote

Like nataraj mentioned, not so VH, the UR was very obvious to spot.
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Captain Pete



Joined: 09 Jun 2007
Posts: 55
Location: Oley, PA

PostPosted: Wed Sep 05, 2007 1:24 pm    Post subject: Reply with quote

OK... for the UR-challenged, which cells contain the UR?
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Johan



Joined: 25 Jun 2007
Posts: 206
Location: Bornem Belgium

PostPosted: Wed Sep 05, 2007 2:40 pm    Post subject: Reply with quote

Quote:
OK... for the UR-challenged, which cells contain the UR?


To avoid the deadly [45] pattern in R68C45, R6C5 must be <6>.
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cgordon



Joined: 04 May 2007
Posts: 769
Location: ontario, canada

PostPosted: Wed Sep 05, 2007 6:42 pm    Post subject: Reply with quote

I did find a naked 4 in Box 9 - which I thought was kind of rare. Then it was just the UR on 45s already mentioned. Didn't see the need for the xy wing.
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cgordon



Joined: 04 May 2007
Posts: 769
Location: ontario, canada

PostPosted: Wed Sep 05, 2007 6:46 pm    Post subject: Reply with quote

....sorry - I see it was a UR or an XY wing - not both.
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nataraj



Joined: 03 Aug 2007
Posts: 1048
Location: near Vienna, Austria

PostPosted: Wed Sep 05, 2007 8:17 pm    Post subject: Reply with quote

Now, here's what I got:
Code:

+--------------------------+--------------------------+--------------------------+
| 2       56      4        | 9       7       56       | 13      8       13       |
| 57      9       8        | 1       3       4        | 2       57      6        |
| 1       3       67       | 8       2       56       | 9       57      4        |
+--------------------------+--------------------------+--------------------------+
| 57      4       2        | 3       56      17       | 8       16      9        |
| 8      #16      367      | 2       9       17       | 4     -1 36     5        |
| 9     -1 56    #36       | *45    *456     8        | 7       2      #13       |
+--------------------------+--------------------------+--------------------------+
| 3       2       5        | 7       1       9        | 6       4       8        |
| 6       8       9        | *45    *45      2        | 13      13      7        |
| 4       7       1        | 6       8       3        | 5       9       2        |
+--------------------------+--------------------------+--------------------------+

with the UR marked *
and the xy-wing marked #

where is the W-wing?
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Marty R.



Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA

PostPosted: Wed Sep 05, 2007 9:19 pm    Post subject: Reply with quote

Quote:
where is the W-wing?


In your posted grid, 1s in r6c2 and r6c9 connect the 16 pairs.
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nataraj



Joined: 03 Aug 2007
Posts: 1048
Location: near Vienna, Austria

PostPosted: Thu Sep 06, 2007 6:06 am    Post subject: Reply with quote

... and the '17's in c6 connect them, too.
seems all I was looking at were the '13' pairs

clearly I must have had a very bad day yesterday.

Thanks, Marty!
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