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Jan 17 VH

 
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hughwill



Joined: 05 Apr 2010
Posts: 422
Location: Birmingham UK

PostPosted: Sun Jan 17, 2016 11:00 am    Post subject: Jan 17 VH Reply with quote

After basics:
Code:

+---------------+--------------+-------------------+
| 5   7    2    | 49  1    3   | 689   469   489   |
| 9   34   34   | 8   5    6   | 7     2     1     |
| 18  6    18   | 479 47   2   | 39    5     349   |
+---------------+--------------+-------------------+
| 126 24   1467 | 3   9    47  | 15    8     257   |
| 3   29   5    | 1   27   8   | 4     79    6     |
| 12  8    1479 | 247 6    5   | 139   379   2379  |
+---------------+--------------+-------------------+
| 268 1    3689 | 5   2347 479 | 3689  34679 34789 |
| 4   2359 3689 | 27  237  1   | 35689 3679  35789 |
| 7   359  39   | 6   8    49  | 2     1     3459  |
+---------------+--------------+-------------------+

Play this puzzle online at the Daily Sudoku site

So simple it took me ages to see the 47-2 XY wing pivot r4c6:: r5c2<>2
and basics from then on.

Hugh
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George Woods



Joined: 28 Mar 2006
Posts: 304
Location: Dorset UK

PostPosted: Sun Jan 17, 2016 6:32 pm    Post subject: a wwing solution Reply with quote

The W Wing in 47 in boxes 2 and 5 operating 4s on col 4 so that r5c5 cannot be 7 sse
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hughwill



Joined: 05 Apr 2010
Posts: 422
Location: Birmingham UK

PostPosted: Mon Jan 18, 2016 10:33 am    Post subject: Re: a wwing solution Reply with quote

George Woods wrote:
The W Wing in 47 in boxes 2 and 5 operating 4s on col 4 so that r5c5 cannot be 7 sse


That looks a bit more complicated than a W wing due to the
two candidate 4s in b2c4, or am I mistaken? It still works
of course!

Hugh
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Marty R.



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

PostPosted: Mon Jan 18, 2016 3:35 pm    Post subject: Re: a wwing solution Reply with quote

hughwill wrote:
George Woods wrote:
The W Wing in 47 in boxes 2 and 5 operating 4s on col 4 so that r5c5 cannot be 7 sse


That looks a bit more complicated than a W wing due to the
two candidate 4s in b2c4, or am I mistaken? It still works
of course!

Hugh


I think that's called a grouped strong link. It's not that complicated if you train yourself to look for grouped links in addition to regular. First time I saw one I questioned it, "hey that's not a strong link." (It's easy to learn that way!)
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