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Apr 13 VH

 
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Clement



Joined: 24 Apr 2006
Posts: 1113
Location: Dar es Salaam Tanzania
PostPosted: Thu Apr 12, 2012 10:33 pm    Post subject: Apr 13 VH Reply with quote
XYZ-Wing 247 hinged in r1c9 solves it by setting r1c7<>2.
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hughwill



Joined: 05 Apr 2010
Posts: 424
Location: Birmingham UK
PostPosted: Fri Apr 13, 2012 3:30 pm    Post subject: Reply with quote
Code:

+--------------+----------+-------------+
| 3    27 1    | 45 6  9  | 25 8   247  |
| 6    27 48   | 45 1  28 | 3  457 9    |
| 48   9  5    | 7  28 3  | 1  6   24   |
+--------------+----------+-------------+
| 29   6  29   | 8  5  4  | 7  1   3    |
| 1    8  7    | 2  3  6  | 4  9   5    |
| 5    4  3    | 9  7  1  | 8  2   6    |
+--------------+----------+-------------+
| 2489 1  2489 | 3  28 5  | 6  47  2478 |
| 7    3  248  | 6  9  28 | 25 45  1    |
| 28   5  6    | 1  4  7  | 9  3   28   |
+--------------+----------+-------------+

Play this puzzle online at the Daily Sudoku site


There's a 245 XY wing at r1c7 which also does the job.....
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