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Sep 14 VH

 
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Clement



Joined: 24 Apr 2006
Posts: 1111
Location: Dar es Salaam Tanzania

PostPosted: Wed Sep 14, 2016 8:18 am    Post subject: Sep 14 VH Reply with quote

Code:

+------------+--------+------------+
| 47  1   6  | 3 2 48 | 58 9  57   |
| 8   3   27 | 5 9 1  | 6  27 4    |
| 5   9   24 | 7 6 48 | 3  28 1    |
+------------+--------+------------+
| 3   4   5  | 1 7 2  | 9  6  8    |
| 27  6   9  | 8 3 5  | 4  1  27   |
| 1   27  8  | 9 4 6  | 25 37 2357 |
+------------+--------+------------+
| 9   5   1  | 2 8 3  | 7  4  6    |
| 6   28  3  | 4 1 7  | 28 5  9    |
| 247 278 47 | 6 5 9  | 1  38 23   |
+------------+--------+------------+
XY-Wing 27-5 pivoted in r5c9; r1c7, r6c9 <> 5; stte
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hughwill



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

PostPosted: Wed Sep 14, 2016 10:01 am    Post subject: Sep 14 VH Reply with quote

Code:

+------------+--------+------------+
| 47  1   6  | 3 2 48 | 58 9  57   |
| 8   3   27 | 5 9 1  | 6  27 4    |
| 5   9   24 | 7 6 48 | 3  28 1    |
+------------+--------+------------+
| 3   4   5  | 1 7 2  | 9  6  8    |
| 27  6   9  | 8 3 5  | 4  1  27   |
| 1   27  8  | 9 4 6  | 25 37 2357 |
+------------+--------+------------+
| 9   5   1  | 2 8 3  | 7  4  6    |
| 6   28  3  | 4 1 7  | 28 5  9    |
| 247 278 47 | 6 5 9  | 1  38 23   |
+------------+--------+------------+

Play this puzzle online at the Daily Sudoku site
Clement said:
Quote:
XY-Wing 27-5 pivoted in r5c9; r1c7, r6c9 <> 5; stte


Or 24-7 XYZ wing pivot r9c1: r2c6=7: stte (Easiest basics for a long time...)

Hugh
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Marty R.



Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA

PostPosted: Wed Sep 14, 2016 12:45 pm    Post subject: Re: Sep 14 VH Reply with quote

hughwill wrote:
Code:

+------------+--------+------------+
| 47  1   6  | 3 2 48 | 58 9  57   |
| 8   3   27 | 5 9 1  | 6  27 4    |
| 5   9   24 | 7 6 48 | 3  28 1    |
+------------+--------+------------+
| 3   4   5  | 1 7 2  | 9  6  8    |
| 27  6   9  | 8 3 5  | 4  1  27   |
| 1   27  8  | 9 4 6  | 25 37 2357 |
+------------+--------+------------+
| 9   5   1  | 2 8 3  | 7  4  6    |
| 6   28  3  | 4 1 7  | 28 5  9    |
| 247 278 47 | 6 5 9  | 1  38 23   |
+------------+--------+------------+

Play this puzzle online at the Daily Sudoku site
Clement said:
Quote:
XY-Wing 27-5 pivoted in r5c9; r1c7, r6c9 <> 5; stte


Or 24-7 XYZ wing pivot r9c1: r2c6=7: stte (Easiest basics for a long time...)

Hugh


Sorry, Hugh, I don't see it. I don't see a 7 in r2c6. For there to be an elimination, there needs to be one or more cells that see all three of XYZ, XZ and YZ. Those cells would need to be r78c1.
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hughwill



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

PostPosted: Wed Sep 14, 2016 2:13 pm    Post subject: Reply with quote

Marty - As always absolutely right. I was looking at r6c2 but the 247 arrangement doesn't affect that or anything else!
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Stanley P



Joined: 27 Feb 2008
Posts: 20
Location: Tennessee, USA

PostPosted: Wed Sep 14, 2016 2:47 pm    Post subject: Reply with quote

I used the XY-Wing 27-3 pivoted in R5C9. That appeared to get me to the end.
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Marty R.



Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA

PostPosted: Wed Sep 14, 2016 3:13 pm    Post subject: Reply with quote

Stanley P wrote:
I used the XY-Wing 27-3 pivoted in R5C9. That appeared to get me to the end.


That's very interesting, one cell being a pivot for two XY-WIngs.
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