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Clement
Joined: 24 Apr 2006
Posts: 1111
Location: Dar es Salaam Tanzania
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 Posted: Mon Sep 19, 2011 11:37 pm Post subject: Sep 20 VH |
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I used two XY-Wings:-
XY-Wing 69 29 26 pivoted in r2c9 sets r4c7<>6 leads to
XY-Wing 27 47 24 pivoted in r4c6 setting r4c4<>2; r6c7<>2 which solves it. |
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hughwill
Joined: 05 Apr 2010
Posts: 424
Location: Birmingham UK
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| Posted: Tue Sep 20, 2011 4:58 pm Post subject: Sep 20 VH |
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| Did I do something wrong? This one came out for me with basics only..... |
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Marty R.
Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA
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| Posted: Tue Sep 20, 2011 5:10 pm Post subject: Re: Sep 20 VH |
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| hughwill wrote: | | Did I do something wrong? This one came out for me with basics only..... |
You may very well be correct, but it's usually a good idea to try it again when this happens, just to be sure. On my first pass it was basics only, but on the 2nd try I used the same two wings that Clement did. |
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keith
Joined: 19 Sep 2005
Posts: 3355
Location: near Detroit, Michigan, USA
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| Posted: Wed Sep 21, 2011 2:00 am Post subject: |
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After basics: | Code: | +-------------+-------------+-------------+
| 3 7 2 | 4 1 89 | 69 68 5 |
| 5 6 4 | 3 7 89 | 1 28 29 |
| 8 9 1 | 5 2 6 | 7 3 4 |
+-------------+-------------+-------------+
| 1 8 9 | 267 5 47 | 246 267 3 |
| 4 23 7 | 9 36 1 | 8 5 26 |
| 6 235 35 | 27 8 347 | 249 1 279 |
+-------------+-------------+-------------+
| 7 35 6 | 8 9 2 | 35 4 1 |
| 9 4 8 | 1 36 5 | 236 267 267 |
| 2 1 35 | 67 4 37 | 356 9 8 |
+-------------+-------------+-------------+ |
Sudoku Susser says two X-wings and two XY-wings, but they are probably not all necessary.
Keith |
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Jeff
Joined: 06 May 2007
Posts: 46
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| Posted: Thu Sep 22, 2011 12:22 am Post subject: |
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I executed the two XY wings described above, but I can't seem to solve the puzzle. Here is what I get after the two XY wings plus removing a 6 from R8C8 and R8C7 (X wing). I don't seem to be able to finish it up. Could someone please bail me out before I go nuts. Many thanks,
| Code: |
+----------+------------+-------------+
| 3 7 2 | 4 1 89 | 69 68 5 |
| 5 6 4 | 3 7 89 | 1 28 29 |
| 8 9 1 | 5 2 6 | 7 3 4 |
+----------+------------+-------------+
| 1 8 9 | 267 5 47 | 24 267 3 |
| 4 23 7 | 9 36 1 | 8 5 26 |
| 6 235 35 | 27 8 347 | 49 1 79 |
+----------+------------+-------------+
| 7 35 6 | 8 9 2 | 35 4 1 |
| 9 4 8 | 1 36 5 | 23 27 267 |
| 2 1 35 | 67 4 37 | 356 9 8 |
+----------+------------+-------------+
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Marty R.
Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA
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| Posted: Thu Sep 22, 2011 12:35 am Post subject: |
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| Jeff, it looks like on the 472 XY-Wing, you missed deleting the 2 from r4c4. Hope this helps you retain your sanity. |
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Jeff
Joined: 06 May 2007
Posts: 46
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| Posted: Thu Sep 22, 2011 12:57 am Post subject: |
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Marty,
Thanks. I will now be able to regain my sanity,
Jeff |
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