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Sept 27 VH

 
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roaa



Joined: 18 Apr 2009
Posts: 72
Location: Sweden

PostPosted: Fri Sep 27, 2013 7:34 am    Post subject: Sept 27 VH Reply with quote

Two very similar XY-wings (139) both solves it in one step.
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hughwill



Joined: 05 Apr 2010
Posts: 207
Location: Birmingham UK

PostPosted: Fri Sep 27, 2013 9:49 am    Post subject: Reply with quote

After basics:

Code:

+------------+-----------+---------+
| 2  147 139 | 19  6  8  | 47 5 39 |
| 79 147 8   | 5   13 2  | 47 6 39 |
| 5  6   39  | 79  37 4  | 8  2 1  |
+------------+-----------+---------+
| 16 8   2   | 167 17 9  | 5  3 4  |
| 4  5   16  | 16  8  3  | 9  7 2  |
| 3  9   7   | 2   4  5  | 6  1 8  |
+------------+-----------+---------+
| 8  2   4   | 3   5  7  | 1  9 6  |
| 79 17  169 | 8   2  16 | 3  4 5  |
| 16 3   5   | 4   9  16 | 2  8 7  |
+------------+-----------+---------+

Play this puzzle online at the Daily Sudoku site


Roaa said:
Quote:
Two very similar XY-wings (139) both solves it in one step.


....as does the less than elegant 47 UR which sets r8c2 to 7.
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the_lock_man



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

PostPosted: Fri Sep 27, 2013 11:42 am    Post subject: Reply with quote

W-Wing 39 boxes 1 & 3 sets R2C1<>9
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