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Jan 9 VH

 
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hughwill



Joined: 05 Apr 2010
Posts: 424
Location: Birmingham UK
PostPosted: Sat Jan 09, 2016 10:32 am    Post subject: Jan 9 VH Reply with quote
Code:

+----------+-------------+------------+
| 7  129 5 | 389  6  4   | 23 138 129 |
| 19 129 3 | 589  58 17  | 6  178 4   |
| 4  6   8 | 39   2  17  | 5  137 179 |
+----------+-------------+------------+
| 5  3   2 | 4    1  8   | 7  9   6   |
| 6  7   1 | 2    9  5   | 8  4   3   |
| 8  4   9 | 7    3  6   | 1  2   5   |
+----------+-------------+------------+
| 13 8   7 | 6    4  23  | 9  5   12  |
| 2  159 6 | 3589 58 39  | 4  137 17  |
| 39 59  4 | 1    7  239 | 23 6   8   |
+----------+-------------+------------+

Play this puzzle online at the Daily Sudoku site

Maybe we should have gradations for VHs- Easy, Moderate and Very (Very Very Hard)
I grade this an EVH- as easy as 123
Quote:
12-3 XY wing pivot r9c7 r1c9=9. The W wing on 39 is also the easiest type to see...

But I'm not complaining...
Hugh
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dongrave



Joined: 06 Mar 2014
Posts: 568
PostPosted: Sat Jan 09, 2016 1:44 pm    Post subject: Reply with quote
Not that it matters but there were still a few more basics in Hugh's grid.
Code:

 +---------+------------+------------+
 | 7  19 5 | 389 6  4   | 23 138 129 |
 | 19 2  3 | 589 58 17  | 6  178 4   |
 | 4  6  8 | 39  2  17  | 5  137 179 |
 +---------+------------+------------+
 | 5  3  2 | 4   1  8   | 7  9   6   |
 | 6  7  1 | 2   9  5   | 8  4   3   |
 | 8  4  9 | 7   3  6   | 1  2   5   |
 +---------+------------+------------+
 | 13 8  7 | 6   4  23  | 9  5   12  |
 | 2  19 6 | 58  58 39  | 4  137 17  |
 | 39 5  4 | 1   7  239 | 23 6   8   |
 +---------+------------+------------+

There's also a 19-3 XY Wing pivot r8c2 so r7c6<>3 which also solves it.
And the non-standard 58 UR type 1 is pretty easy to spot too.
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