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Aug 6 VH

 
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Clement



Joined: 24 Apr 2006
Posts: 1113
Location: Dar es Salaam Tanzania
PostPosted: Fri Aug 05, 2016 10:48 pm    Post subject: Aug 6 VH Reply with quote
Code:

+------------+-------+---------+
| 89  589 6  | 2 1 3 | 49 7 45 |
| 1   4   7  | 9 8 5 | 3  6 2  |
| 3   259 29 | 4 7 6 | 19 8 15 |
+------------+-------+---------+
| 7   1   3  | 8 5 2 | 6  4 9  |
| 29  29  8  | 7 6 4 | 5  1 3  |
| 5   6   4  | 1 3 9 | 8  2 7  |
+------------+-------+---------+
| 248 28  12 | 5 9 7 | 14 3 6  |
| 6   7   5  | 3 4 1 | 2  9 8  |
| 49  3   19 | 6 2 8 | 7  5 14 |
+------------+-------+---------+

XY-Wing 29-1 pivoted in r3c3; r7c7 <> 1; stte
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hughwill



Joined: 05 Apr 2010
Posts: 424
Location: Birmingham UK
PostPosted: Sat Aug 06, 2016 9:57 am    Post subject: Re: Aug 6 VH Reply with quote
Code:

+------------+-------+---------+
| 89  589 6  | 2 1 3 | 49 7 45 |
| 1   4   7  | 9 8 5 | 3  6 2  |
| 3   259 29 | 4 7 6 | 19 8 15 |
+------------+-------+---------+
| 7   1   3  | 8 5 2 | 6  4 9  |
| 29  29  8  | 7 6 4 | 5  1 3  |
| 5   6   4  | 1 3 9 | 8  2 7  |
+------------+-------+---------+
| 248 28  12 | 5 9 7 | 14 3 6  |
| 6   7   5  | 3 4 1 | 2  9 8  |
| 49  3   19 | 6 2 8 | 7  5 14 |
+------------+-------+---------+

Play this puzzle online at the Daily Sudoku site

Clement wrote:

XY-Wing 29-1 pivoted in r3c3; r7c7 <> 1; stte

And a very 'ho hum' solution indeed. What makes the puzzle a bit
more interesting are two W-Wings - one on 49s that doesn't do it in one
and the one on 19s which sets r3c3 to 2 and does the business.
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George Woods



Joined: 28 Mar 2006
Posts: 304
Location: Dorset UK
PostPosted: Sat Aug 06, 2016 12:27 pm    Post subject: the 49 w wing Reply with quote
Whilst the 49 W wing does not give an instant resolution it sets up a BUG +1 in block A that does!
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Marty R.



Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA
PostPosted: Sat Aug 06, 2016 3:41 pm    Post subject: Reply with quote
While the 49 W-Wing doesn't finish it by itself, adding a pincer transport does. The wing makes a direct elimination of -9r1c1. A transport from r9c1 to r5c2=> -9r1c2 which finishes it.
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