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Sep 30 VH

 
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Clement



Joined: 24 Apr 2006
Posts: 663
Location: Dar es Salaam Tanzania

PostPosted: Sun Sep 29, 2013 10:08 pm    Post subject: Sep 30 VH Reply with quote

Code:

+-------+-------------+------------+
| 7 9 5 | 46  3   2   | 146 8  146 |
| 2 6 1 | 49  5   8   | 3   7  49  |
| 8 3 4 | 679 #67  1   | *69  5  2   |
+-------+-------------+------------+
| 9 1 3 | 67  8   467 | 2   46 5   |
| 6 2 7 | 5   49  3   | 8   1  49  |
| 4 5 8 | 2   1   69  | 7   69 3   |
+-------+-------------+------------+
| 1 7 2 | 3   469 469 | 5   69 8   |
| 3 4 6 | 8   *79  5   | 1-9  2  179 |
| 5 8 9 | 1   2   47  | 46  3  467 |
+-------+-------------+------------+
XY-Wing 67-9 pivoted in r3c5; r8c7<>9; stte.
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Marty R.



Joined: 12 Feb 2006
Posts: 5153
Location: Rochester, NY, USA

PostPosted: Mon Sep 30, 2013 12:15 am    Post subject: Reply with quote

Or 79-4 pivoted in r8c5.
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kuskey



Joined: 10 Dec 2008
Posts: 127
Location: Pembroke, NH

PostPosted: Mon Sep 30, 2013 5:09 am    Post subject: Sep 30 VH Reply with quote

or 469 or 169 xy-wings
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hughwill



Joined: 05 Apr 2010
Posts: 171
Location: Birmingham UK

PostPosted: Mon Sep 30, 2013 9:35 am    Post subject: Sep 30 VH Reply with quote

After my basics(!)

Code:

+-------+-------------+------------+
| 7 9 5 | 46  3   2   | 146 8   16 |
| 2 6 1 | 49  5   8   | 3   7   49 |
| 8 3 4 | 679 67  1   | 69  5   2  |
+-------+-------------+------------+
| 9 1 3 | 467 8   467 | 2   46  5  |
| 6 2 7 | 5   49  3   | 8   1   49 |
| 4 5 8 | 2   1   69  | 7   69  3  |
+-------+-------------+------------+
| 1 7 2 | 3   469 469 | 5   469 8  |
| 3 4 6 | 8   79  5   | 19  2   17 |
| 5 8 9 | 1   2   467 | 46  3   67 |
+-------+-------------+------------+

Play this puzzle online at the Daily Sudoku site

I may have gone wrong here but surely Clement's 'after basics' comes out
with simple basics after the naked pair 69 in column 8 makes r4c8 a 4?
In fact I couldn't get the 4 out of r7c8 as above.

But Clement's solution works as does a 146 XYZ after my basics (having
also removed the 4 from r1c9) and a W wing on 46s- but have I gone
wrong somewhere? And it seemed such a simple puzzle today.....

Hugh
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Marty R.



Joined: 12 Feb 2006
Posts: 5153
Location: Rochester, NY, USA

PostPosted: Mon Sep 30, 2013 1:07 pm    Post subject: Re: Sep 30 VH Reply with quote

hughwill wrote:
After my basics(!)

Code:

+-------+-------------+------------+
| 7 9 5 | 46  3   2   | 146 8   16 |
| 2 6 1 | 49  5   8   | 3   7   49 |
| 8 3 4 | 679 67  1   | 69  5   2  |
+-------+-------------+------------+
| 9 1 3 | 467 8   467 | 2   46  5  |
| 6 2 7 | 5   49  3   | 8   1   49 |
| 4 5 8 | 2   1   69  | 7   69  3  |
+-------+-------------+------------+
| 1 7 2 | 3   469 469 | 5   469 8  |
| 3 4 6 | 8   79  5   | 19  2   17 |
| 5 8 9 | 1   2   467 | 46  3   67 |
+-------+-------------+------------+

Play this puzzle online at the Daily Sudoku site

I may have gone wrong here but surely Clement's 'after basics' comes out
with simple basics after the naked pair 69 in column 8 makes r4c8 a 4?
In fact I couldn't get the 4 out of r7c8 as above.

But Clement's solution works as does a 146 XYZ after my basics (having
also removed the 4 from r1c9) and a W wing on 46s- but have I gone
wrong somewhere? And it seemed such a simple puzzle today.....

Hugh


I have 49 in r7c8. The 6 comes out because of the Locked Candidates in box 6. It looks like Clement's grid might have some sort of mechanical error.
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keith



Joined: 19 Sep 2005
Posts: 3163
Location: near Detroit, Michigan, USA

PostPosted: Mon Sep 30, 2013 5:01 pm    Post subject: Reply with quote

This is the after basics grid:
Code:
+-------------+-------------+-------------+
| 7   9   5   | 46  3   2   |N146 8  E16  |
| 2   6   1   | 49  5   8   | 3   7  H49  |
| 8   3   4   |679 J67  1   |F69  5   2   |
+-------------+-------------+-------------+
| 9   1   3   | 67  8   467 | 2   46  5   |
| 6   2   7   | 5  L49  3   | 8   1   49  |
| 4   5   8   | 2   1  A69  | 7  B69  3   |
+-------------+-------------+-------------+
| 1   7   2   | 3  469 D469 | 5  C49  8   |
| 3   4   6   | 8  K79  5   |G19  2   17  |
| 5   8   9   | 1   2  M47  |I46  3   67  |
+-------------+-------------+-------------+

ABCD is an X-wing on 9.
XY-wings:
EFG -169
HFI -469
FJK 67-9
LKM -479
FIC 46-9
XYZ-wing ENI 14-6

I am too lazy to look for W- and M-wings.

Keith Razz
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hughwill



Joined: 05 Apr 2010
Posts: 171
Location: Birmingham UK

PostPosted: Tue Oct 01, 2013 10:05 pm    Post subject: Re: Sep 30 VH Reply with quote

Thanks Keith- so what you're saying if I've got this right is that the
puzzle can be solved.......... Razz


(Thanks also to Marty - BTW has any VH puzzle beaten this one for the
number of solutions?)

Hugh
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keith



Joined: 19 Sep 2005
Posts: 3163
Location: near Detroit, Michigan, USA

PostPosted: Wed Oct 02, 2013 2:10 am    Post subject: Reply with quote

Hugh,

Yes. If you find all the wings you are probably on the correct path!

I do not recall ever seeing a puzzle with so many wings coexisting.

Keith
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