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Aug 17 VH

 
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Clement



Joined: 24 Apr 2006
Posts: 668
Location: Dar es Salaam Tanzania

PostPosted: Fri Aug 16, 2013 10:17 pm    Post subject: Aug 17 VH Reply with quote

Code:

+-------------+-----------+-----------+
| 249 2347 6  | 27 1   5  | 39 27  8  |
| 1   237  79 | 8  6   4  | 39 5   27 |
| 5   27   8  | 3  27  9  | 1  6   4  |
+-------------+-----------+-----------+
| 8   247  79 | 12 24  6  | 5  3   19 |
| 24  5    1  | 9  3   8  | 6  247 27 |
| 249 6    3  | 5  247 17 | *48 2-48 19 |
+-------------+-----------+-----------+
| 3   8    4  | 6  9   2  | 7  1   5  |
| 6   9    2  | 17 5   17 | *48 *48  3  |
| 7   1    5  | 4  8   3  | 2  9   6  |
+-------------+-----------+-----------+
Type 1 UR 48 in r68c78; r6c8=2; stte.
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roaa



Joined: 18 Apr 2009
Posts: 72
Location: Sweden

PostPosted: Sat Aug 17, 2013 7:39 am    Post subject: Reply with quote

An xy-wing 247 forces r3c2=2, which solves it.
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hughwill



Joined: 05 Apr 2010
Posts: 172
Location: Birmingham UK

PostPosted: Sat Aug 17, 2013 7:55 am    Post subject: 17 Aug VH Reply with quote

Code:

+------------+-----------+-----------+
| 49  34  6  | 27 1   5  | 39 27  8  |
| 1   237 79 | 8  6   4  | 39 5   27 |
| 5   27  8  | 3  27  9  | 1  6   4  |
+------------+-----------+-----------+
| 8   47  79 | 12 24  6  | 5  3   19 |
| 24  5   1  | 9  3   8  | 6  247 27 |
| 249 6   3  | 5  247 17 | 48 248 19 |
+------------+-----------+-----------+
| 3   8   4  | 6  9   2  | 7  1   5  |
| 6   9   2  | 17 5   17 | 48 48  3  |
| 7   1   5  | 4  8   3  | 2  9   6  |
+------------+-----------+-----------+

Play this puzzle online at the Daily Sudoku site

A few extra basics to show Roaa's 'double' XY solution.
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