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Jan 22 VH

 
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Clement



Joined: 24 Apr 2006
Posts: 1007
Location: Dar es Salaam Tanzania

PostPosted: Thu Jan 21, 2016 10:13 pm    Post subject: Jan 22 VH Reply with quote

Code:

+----------+-------------+-----------+
| 7  6  28 | 4    1   3  | 5  28 9   |
| 89 4  3  | 259-6 59  26 | 1  28 7   |
| 5  29 1  | *29   7   8  | 6  4  3   |
+----------+-------------+-----------+
| 2  7  4  | 8    3   1  | 9  5  6   |
| 3  1  5  | 69   49  4-6 | 28 7  28  |
| 6  8  9  | 7    2   5  | 3  1  4   |
+----------+-------------+-----------+
| 4  5  28 | 3    6   7  | 28 9  1   |
| 89 29 6  | 1    458 24 | 7  3  258 |
| 1  3  7  | 25   58  9  | 4  6  258 |
+----------+-------------+-----------+

XY-Wing 29-6 pivoted in r3c4; r2c4, r5c6 <>6; stte
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the_lock_man



Joined: 18 Dec 2012
Posts: 38
Location: Portsmarfff, UK

PostPosted: Fri Jan 22, 2016 12:22 pm    Post subject: Reply with quote

Also XY Wing 29-5 pivoted in the same place; r7c5 & r8c5 <>5; also stte
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Marty R.



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

PostPosted: Fri Jan 22, 2016 2:52 pm    Post subject: Reply with quote

the_lock_man wrote:
Also XY Wing 29-5 pivoted in the same place; r7c5 & r8c5 <>5; also stte


Very interesting. I think that's a first for me, two XY-Wings, with different pincers, pivoted in the same cell.
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hughwill



Joined: 05 Apr 2010
Posts: 414
Location: Birmingham UK

PostPosted: Sat Jan 23, 2016 11:01 am    Post subject: Reply with quote

the_lock_man wrote:
Also XY Wing 29-5 pivoted in the same place; r7c5 & r8c5 <>5; also stte


I tried that one but it didn't seem to come out with basics. As always I may
have missed something. It is an unusual combination of wings though.
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dongrave



Joined: 06 Mar 2014
Posts: 332

PostPosted: Sat Jan 23, 2016 1:02 pm    Post subject: Reply with quote

I missed it the first time too Hugh! Did you remember to eliminate the 5 from r2c4? That gives us r2c5=5 and r9c5 is 8 so r8c5=4, r8c6=2 and r9c4=5 and then it branches out in all directions to solve it.
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