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Clement
Joined: 24 Apr 2006
Posts: 1113
Location: Dar es Salaam Tanzania
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 Posted: Fri Nov 25, 2011 10:22 pm Post subject: Nov 26 VH |
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| XY-Wing 29 23 39 pivoted in r5c6; r4c2<>9 solves it. |
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Marty R.
Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA
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| Posted: Sat Nov 26, 2011 1:46 am Post subject: |
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| With my usual reluctance, it solved with basics, both with pencil and paper and then on Draw/Play. |
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arkietech
Joined: 31 Jul 2008
Posts: 1834
Location: Northwest Arkansas USA
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| Posted: Sat Nov 26, 2011 10:09 am Post subject: |
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I got here with basics. I see a 23 w-wing | Code: |
*--------------------------------------------------*
| 1 379 39 | 5 8 24 | 6 23 47 |
| 5 37 8 | 24 6 1 | 9 23 47 |
| 2 4 6 | 3 7 9 | 1 8 5 |
|----------------+----------------+----------------|
| 6 39 5 | 29 4 8 | 7 1 239 |
| 7 1 39 | 6 5 23 | 8 4 239 |
| 4 8 2 | 79 1 37 | 5 6 39 |
|----------------+----------------+----------------|
| 3 6 7 | 1 2 5 | 4 9 8 |
| 8 2 1 | 47 9 47 | 3 5 6 |
| 9 5 4 | 8 3 6 | 2 7 1 |
*--------------------------------------------------*
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Clement
Joined: 24 Apr 2006
Posts: 1113
Location: Dar es Salaam Tanzania
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| Posted: Sat Nov 26, 2011 2:21 pm Post subject: Nov 26 VH |
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| Marty R. wrote: | | With my usual reluctance, it solved with basics, both with pencil and paper and then on Draw/Play. |
After the basics I have the same Grid as shown by arkietech above. I can't see more eliminations by using basics only. I might not be seeing the obvious. |
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Marty R.
Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA
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| Posted: Sat Nov 26, 2011 5:02 pm Post subject: |
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OK, on try #3 basics didn't do it. XY-Wing (293); r5c3<>3.
One frustrating thing about Sudoku is that one often can't learn from his mistakes because I have no idea what I did wrong the first two times. |
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