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May 28 VH

 
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Clement



Joined: 24 Apr 2006
Posts: 678
Location: Dar es Salaam Tanzania

PostPosted: Sun May 27, 2012 10:16 pm    Post subject: May 28 VH Reply with quote

XY-Wing 78 37 38 pivoted in r1c6; r7c3<>8.
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hughwill



Joined: 05 Apr 2010
Posts: 197
Location: Birmingham UK

PostPosted: Mon May 28, 2012 2:45 pm    Post subject: 28th May VH Reply with quote

Code:

+----------+------------+-----------+
| 5  1  78 | 9  38  37  | 2   6   4 |
| 2  37 9  | 6  348 347 | 38  1   5 |
| 48 34 6  | 2  1   5   | 389 389 7 |
+----------+------------+-----------+
| 1  8  3  | 5  7   2   | 6   4   9 |
| 7  6  5  | 34 34  9   | 1   2   8 |
| 49 49 2  | 8  6   1   | 5   7   3 |
+----------+------------+-----------+
| 6  57 78 | 1  9   38  | 4   35  2 |
| 89 2  1  | 34 5   348 | 7   39  6 |
| 3  59 4  | 7  2   6   | 89  589 1 |
+----------+------------+-----------+

Play this puzzle online at the Daily Sudoku site


This one was straightforward enough in the end, but it had
an annoying distraction in the 378 XY wing with pivot on r2c2
which takes the 3s out of r2c4 and r2c5 but then leaves
you with nothing. It took me ages to see the longer-range XY
which solves it.
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