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Feb 17 VH

 
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TerenceF



Joined: 21 Dec 2007
Posts: 19
Location: Takapuna, NZ

PostPosted: Fri Feb 17, 2012 1:34 am    Post subject: Feb 17 VH Reply with quote

Code:

+----------+-------------+----------+
| 8   2  1 | 5    6  47  | 9   3 47 |
| 7   6  9 | 1    38 34  | 5   2 48 |
| 4   5  3 | 2789 89 279 | 78  1 6  |
+----------+-------------+----------+
| 5   19 2 | 689  4  69  | 3   7 18 |
| 6   3  4 | 278  1  27  | 28  9 5  |
| 19  8  7 | 239  5  239 | 4   6 12 |
+----------+-------------+----------+
| 3   7  6 | 4    2  5   | 1   8 9  |
| 29  4  8 | 369  39 1   | 267 5 27 |
| 129 19 5 | 69   7  8   | 26  4 3  |
+----------+-------------+----------+

I see an X wing on 6 and a129 XYZ wing
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Marty R.



Joined: 12 Feb 2006
Posts: 5178
Location: Rochester, NY, USA

PostPosted: Fri Feb 17, 2012 2:20 am    Post subject: Re: Feb 17 VH Reply with quote

TerenceF wrote:
Code:

+----------+-------------+----------+
| 8   2  1 | 5    6  47  | 9   3 47 |
| 7   6  9 | 1    38 34  | 5   2 48 |
| 4   5  3 | 2789 89 279 | 78  1 6  |
+----------+-------------+----------+
| 5   19 2 | 689  4  69  | 3   7 18 |
| 6   3  4 | 278  1  27  | 28  9 5  |
| 19  8  7 | 239  5  239 | 4   6 12 |
+----------+-------------+----------+
| 3   7  6 | 4    2  5   | 1   8 9  |
| 29  4  8 | 369  39 1   | 267 5 27 |
| 129 19 5 | 69   7  8   | 26  4 3  |
+----------+-------------+----------+

I see an X wing on 6 and a129 XYZ wing

Terence,

In this grid 6 is a hidden single in c6. Also, I'm unable to find the XYZ-Wing.
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arkietech



Joined: 31 Jul 2008
Posts: 1733
Location: Northwest Arkansas USA

PostPosted: Fri Feb 17, 2012 2:37 am    Post subject: Reply with quote

Code:
 *--------------------------------------------------*
 | 8    2    1    | 5    6    47   | 9    3    47   |
 | 7    6    9    | 1    38   34   | 5    2    48   |
 | 4    5    3    | 279  89   279  | 78   1    6    |
 |----------------+----------------+----------------|
 | 5    19   2    | 89   4    6    | 3    7    18   |
 | 6    3    4    | 278  1    27   | 28   9    5    |
 |*19   8    7    | 239  5    239  | 4    6   *12   |
 |----------------+----------------+----------------|
 | 3    7    6    | 4    2    5    | 1    8    9    |
 |*29   4    8    | 369  39   1    | 267  5    7-2  |
 | 129  19   5    | 69   7    8    | 26   4    3    |
 *--------------------------------------------------*
xy-wing 192 => r8c9<>2
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hughwill



Joined: 05 Apr 2010
Posts: 228
Location: Birmingham UK

PostPosted: Fri Feb 17, 2012 10:35 am    Post subject: Reply with quote

Code:

+--------------+--------------+-------------+
| 8   2   1    | 5    6   47  | 9    3  47  |
| 7   569 69   | 1    389 349 | 458  2  48  |
| 4   59  3    | 278  89  279 | 578  1  6   |
+--------------+--------------+-------------+
| 5   19  29   | 289  4   6   | 3    7  128 |
| 6   3   4    | 2789 1   279 | 28   89 5   |
| 129 8   7    | 239  5   239 | 246  69 124 |
+--------------+--------------+-------------+
| 3   7   68   | 4    2   5   | 1    68 9   |
| 29  4   2689 | 369  39  1   | 2678 5  278 |
| 129 169 5    | 69   7   8   | 26   4  3   |
+--------------+--------------+-------------+

Play this puzzle online at the Daily Sudoku site


I didn't get as far as Terence on basics- see above. I had to use the 268 XY in c7+8 to progress
finishing with Dan's solution. Did I miss some basics?
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Marty R.



Joined: 12 Feb 2006
Posts: 5178
Location: Rochester, NY, USA

PostPosted: Fri Feb 17, 2012 6:50 pm    Post subject: Reply with quote

hughwill wrote:
Code:

+--------------+--------------+-------------+
| 8   2   1    | 5    6   47  | 9    3  47  |
| 7   569 69   | 1    389 349 | 458  2  48  |
| 4   59  3    | 278  89  279 | 578  1  6   |
+--------------+--------------+-------------+
| 5   19  29   | 289  4   6   | 3    7  128 |
| 6   3   4    | 2789 1   279 | 28   89 5   |
| 129 8   7    | 239  5   239 | 246  69 124 |
+--------------+--------------+-------------+
| 3   7   68   | 4    2   5   | 1    68 9   |
| 29  4   2689 | 369  39  1   | 2678 5  278 |
| 129 169 5    | 69   7   8   | 26   4  3   |
+--------------+--------------+-------------+

Play this puzzle online at the Daily Sudoku site


I didn't get as far as Terence on basics- see above. I had to use the 268 XY in c7+8 to progress
finishing with Dan's solution. Did I miss some basics?

I missed basics too, but Dan usually lets me know where I screwed up. In your grid the 8 can be removed from r3c4 because of the the 8s in c5, but I don't know how you got rid of the 9 from that cell.
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TerenceF



Joined: 21 Dec 2007
Posts: 19
Location: Takapuna, NZ

PostPosted: Fri Feb 17, 2012 8:23 pm    Post subject: Re: Feb 17 VH Reply with quote

Marty R. wrote:
TerenceF wrote:
Code:

+----------+-------------+----------+
| 8   2  1 | 5    6  47  | 9   3 47 |
| 7   6  9 | 1    38 34  | 5   2 48 |
| 4   5  3 | 2789 89 279 | 78  1 6  |
+----------+-------------+----------+
| 5   19 2 | 689  4  69  | 3   7 18 |
| 6   3  4 | 278  1  27  | 28  9 5  |
| 19  8  7 | 239  5  239 | 4   6 12 |
+----------+-------------+----------+
| 3   7  6 | 4    2  5   | 1   8 9  |
| 29  4  8 | 369  39 1   | 267 5 27 |
| 129 19 5 | 69   7  8   | 26  4 3  |
+----------+-------------+----------+

I see an X wing on 6 and a129 XYZ wing

Terence,

In this grid 6 is a hidden single in c6. Also, I'm unable to find the XYZ-Wing.


@Marty: you are quite right of course about the hidden single, but it was hiding from me! Embarassed

So I was referring to the X wing on 6 in r89c47 which eliminated the 6 from r4c4.

This reveals the 6 as a hidden single in r4, and for some reason I can spot hidden singles in rows better than I can in columns!!
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hughwill



Joined: 05 Apr 2010
Posts: 228
Location: Birmingham UK

PostPosted: Fri Feb 17, 2012 10:45 pm    Post subject: Reply with quote

The 8 rather than a 9 in r3c4 was a typo.......memo to self-must be more careful, these guys spot everything!

Cool
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Marty R.



Joined: 12 Feb 2006
Posts: 5178
Location: Rochester, NY, USA

PostPosted: Sat Feb 18, 2012 1:01 am    Post subject: Reply with quote

Quote:
.......memo to self-must be more careful, these guys spot everything!

Except, unfortunately, the best solutions!! Embarassed Laughing
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