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Sep 11 VH

 
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yeoks



Joined: 16 May 2010
Posts: 19

PostPosted: Wed Sep 11, 2013 7:52 am    Post subject: Sep 11 VH Reply with quote

Code:

+------------+-----------+--------------+
| 7  129 5   | 8  249 3  | 124 1249 6   |
| 29* 4  13  | 29* 6  7  | 8   13   5   |
| 8  6   239 | 1  249 5  | 7   2349 29  |
+------------+-----------+--------------+
| 4  8   12  | 5  3   9  | 12  6    7   |
| 5  7   6   | 24 12  14 | 9   8    3   |
| 3  129 129 | 7  8   6  | 5   12   4   |
+------------+-----------+--------------+
| 29* 5  4   | 6  1-9 8  | 3   7    129 |
| 6  29  8   | 3  7   14 | 24  5    129 |
| 1  3   7   | 49* 5   2  | 6   49   8   |
+------------+-----------+--------------+


A skyscraper (9) in Cols 14 => r7c5<>9 does it.
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roaa



Joined: 18 Apr 2009
Posts: 78
Location: Sweden

PostPosted: Wed Sep 11, 2013 8:53 am    Post subject: Reply with quote

An xy-wing 249 forces r8c2=9 which solves it.
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the_lock_man



Joined: 18 Dec 2012
Posts: 10
Location: Portsmarfff, UK

PostPosted: Wed Sep 11, 2013 1:24 pm    Post subject: Reply with quote

I'm obviously being fffick, because I don't see that XY wing at all (where is the pivot?)

I used an xy wing 129, using the chain of 29s to extend the pincers, making r5c4<>2
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Marty R.



Joined: 12 Feb 2006
Posts: 5165
Location: Rochester, NY, USA

PostPosted: Wed Sep 11, 2013 2:59 pm    Post subject: Reply with quote

Quote:
because I don't see that XY wing at all (where is the pivot?)


Pivot is in r8c7.
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the_lock_man



Joined: 18 Dec 2012
Posts: 10
Location: Portsmarfff, UK

PostPosted: Mon Sep 16, 2013 12:45 pm    Post subject: Reply with quote

I've caught up now - I was trying to see how that XY wing was forcing R8C2<>2, rather than seeing that the wing made R8C9<>9. Apologies for my fffickness.
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