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roaa
Joined: 18 Apr 2009
Posts: 112
Location: Sweden
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 Posted: Thu Dec 29, 2011 8:42 am Post subject: Dec 29 VH |
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| No advanced method at all! Did I make a lucky mistake? |
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Clement
Joined: 24 Apr 2006
Posts: 1111
Location: Dar es Salaam Tanzania
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| Posted: Thu Dec 29, 2011 9:11 am Post subject: Re: Dec 29 VH |
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| roaa wrote: | | No advanced method at all! Did I make a lucky mistake? |
I think so.
I have to use a two stepper solution. XY-Wing 679 pivoted in r5c1; r9c2<>9 and the x-wing on 4 in col 58; r1c7<>4 and r6c4<>4. |
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hughwill
Joined: 05 Apr 2010
Posts: 424
Location: Birmingham UK
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| Posted: Thu Dec 29, 2011 11:02 am Post subject: Re: Dec 29 VH |
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| Code: |
+-------------+------------+-------------+
| 3 6 5 | 9 48 248 | 1247 247 17 |
| 79 179 19 | 24 6 3 | 1247 8 5 |
| 4 2 8 | 7 1 5 | 3 6 9 |
+-------------+------------+-------------+
| 8 79 69 | 1 3 46 | 47 5 2 |
| 67 5 4 | 268 78 268 | 9 1 3 |
| 1 3 2 | 5 47 9 | 8 47 6 |
+-------------+------------+-------------+
| 5 4 7 | 3 2 1 | 6 9 8 |
| 2 8 136 | 46 9 46 | 5 37 17 |
| 69 19 1369 | 68 5 7 | 12 23 4 |
+-------------+------------+-------------+
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Play this puzzle online at the Daily Sudoku site
I certainly needed the XY wing setting r9c2 mentioned by Clement (the second 679 XY setting r2c3 to 1 appears to lead nowhere) but after this it seems to come out without the X wing..... |
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Marty R.
Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA
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| Posted: Thu Dec 29, 2011 4:50 pm Post subject: |
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| I used Clement's two moves, in reverse order, but it doesn't matter. |
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