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Apr 1 VH

 
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roaa



Joined: 18 Apr 2009
Posts: 112
Location: Sweden

PostPosted: Wed Apr 01, 2015 8:27 am    Post subject: Apr 1 VH Reply with quote

One of several X-wings 179 gives r2c6=6, which solves it.
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hughwill



Joined: 05 Apr 2010
Posts: 424
Location: Birmingham UK

PostPosted: Wed Apr 01, 2015 10:05 am    Post subject: Re: Apr 1 VH Reply with quote

roaa wrote:
One of several X-wings 179 gives r2c6=6, which solves it.


After basics:
Code:

+-----------+----------+---------+
| 4   8  19 | 17 3  2  | 6  5 79 |
| 167 79 3  | 8  5  16 | 19 4 2  |
| 16  5  2  | 4  67 9  | 18 3 78 |
+-----------+----------+---------+
| 8   3  7  | 9  2  4  | 5  1 6  |
| 2   4  5  | 17 67 16 | 39 8 39 |
| 9   1  6  | 5  8  3  | 7  2 4  |
+-----------+----------+---------+
| 3   6  8  | 2  9  5  | 4  7 1  |
| 5   2  4  | 6  1  7  | 38 9 38 |
| 17  79 19 | 3  4  8  | 2  6 5  |
+-----------+----------+---------+

Play this puzzle online at the Daily Sudoku site

Yes indeed- the 167-XY wing also removes the 1 in r1c3 and this can also
be done by a W-wing on 17.

On the one hand- nice to get a double VH to end and start the month
On the other- Yet another 1 stepper (though with more than one
solution.....).
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