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Ingies
Joined: 19 Mar 2008
Posts: 5
Location: New Zealand
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 Posted: Tue Mar 25, 2008 2:54 pm Post subject: March 26 VH |
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After basics I got this far
| Code: |
+-----------+------------+-----------+
| 1 245 458 | 6 89 29 | 45 3 7 |
| 6 57 58 | 137 378 4 | 2 15 9 |
| 9 247 3 | 17 5 27 | 46 146 8 |
+-----------+------------+-----------+
| 2 6 59 | 59 1 8 | 47 47 3 |
| 4 59 1 | 579 79 3 | 8 2 6 |
| 8 3 7 | 2 4 6 | 1 9 5 |
+-----------+------------+-----------+
| 5 49 6 | 479 2 79 | 3 8 1 |
| 3 1 2 | 8 69 5 | 679 67 4 |
| 7 8 49 | 349 369 1 | 569 56 2 |
+-----------+------------+-----------+
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Play this puzzle online at the Daily Sudoku site
Then 2 xy wings solved it, the first taking out the 9 in R1C5, but this didn't solve it. The second removing the 9 from R5C5. This my first VH sudoku I have been able to solve on my own so I thought I would share with you how I got there, no doubt there are other ways of getting there. |
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keith
Joined: 19 Sep 2005
Posts: 3355
Location: near Detroit, Michigan, USA
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| Posted: Tue Mar 25, 2008 6:33 pm Post subject: |
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There is an XYZ-wing that takes out <5> in R1C2, then an XY-wing that takes out <9> in R7C6.
Keith |
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gohast
Joined: 26 Sep 2006
Posts: 18
Location: Dublin, Ireland
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| Posted: Wed Mar 26, 2008 12:48 am Post subject: |
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| Very pleased with myself, spotted the XYZ and XY Wings in 17 mins. I think it's starting to click. |
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Mindwarp
Joined: 13 Sep 2007
Posts: 25
Location: St. Ives, England
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| Posted: Wed Mar 26, 2008 5:36 am Post subject: |
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I used the Robert the Bruce technique on R5C4!  That solved it for me. |
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tlanglet
Joined: 17 Oct 2007
Posts: 2468
Location: Northern California Foothills
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| Posted: Wed Mar 26, 2008 9:08 am Post subject: |
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Some how I immediately noticed a XYZ-wing on 458 that removed the 5 at r2c2, which then setup a XY-wing on 249 deleting 9 from r7c6. After a little cleanup it took a XY-wing on 579 to knock out the 7 at r2c5 that solved the puzzle. 
Ted |
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Johan
Joined: 25 Jun 2007
Posts: 206
Location: Bornem Belgium
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| Posted: Wed Mar 26, 2008 10:29 am Post subject: |
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| The same sequence described by Ted solved the puzzle for me. |
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cgordon
Joined: 04 May 2007
Posts: 769
Location: ontario, canada
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| Posted: Wed Mar 26, 2008 1:17 pm Post subject: |
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... same sequence for me.
| Quote: | | I used the Robert the Bruce technique on R5C4! That solved it for me. |
Am I missing something? What connection does the Scotsman, Robert Bruce have with Sudokus. Spiders maybe?? Invasion of Ireland 1315? (No that was his brother Ted). Picking on Englishmen like me maybe? As with some of the responses to my posts. |
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nataraj
Joined: 03 Aug 2007
Posts: 1048
Location: near Vienna, Austria
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| Posted: Wed Mar 26, 2008 5:56 pm Post subject: |
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| cgordon wrote: | | What connection does the Scotsman, Robert Bruce have with Sudokus. Spiders maybe?? Invasion of Ireland 1315? (No that was his brother Ted). Picking on Englishmen like me maybe? As with some of the responses to my posts. |
I would have thought that the reference was to Robert Bruce, author of "Mastering Astral Projection: 90-day Guide To Out-of-body Experience"
(no kidding, he is for real, see this Wikipedia entry) 
Or was it the "Bruce Force" method? I am getting confused. So many names. So many possibilities for the serious Sudoku addict |
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crunched
Joined: 05 Feb 2008
Posts: 168
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| Posted: Wed Mar 26, 2008 11:04 pm Post subject: Re: March 26 VH |
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| Ingies wrote: | After basics I got this far
| Code: |
+-----------+------------+-----------+
| 1 245 458 | 6 89 29 | 45 3 7 |
| 6 57 58 | 137 378 4 | 2 15 9 |
| 9 247 3 | 17 5 27 | 46 146 8 |
+-----------+------------+-----------+
| 2 6 59 | 59 1 8 | 47 47 3 |
| 4 59 1 | 579 79 3 | 8 2 6 |
| 8 3 7 | 2 4 6 | 1 9 5 |
+-----------+------------+-----------+
| 5 49 6 | 479 2 79 | 3 8 1 |
| 3 1 2 | 8 69 5 | 679 67 4 |
| 7 8 49 | 349 369 1 | 569 56 2 |
+-----------+------------+-----------+
|
Play this puzzle online at the Daily Sudoku site
Then 2 xy wings solved it, the first taking out the 9 in R1C5, but this didn't solve it. The second removing the 9 from R5C5. This my first VH sudoku I have been able to solve on my own so I thought I would share with you how I got there, no doubt there are other ways of getting there. |
I cannot follow this. I just don't see an xy wing --- that takes out a 9 in R1C5; nor do I see an xy wing that removes a 9 from R5C5.
All I can see is an XY-Wing with R1C5 as the pivot (59) on R2C2 (57) and R5C5 (79). The 7s are the pincers which removes the 7 in R2C5. That leaves a 3 in R2C5. From there I was eventually able to solve the puzzle without using any wings or such. But this puzzle really ate my time! 
I don't see the xyz wing either. Can somebody point out what my blin-mind can't see? |
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crunched
Joined: 05 Feb 2008
Posts: 168
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| Posted: Wed Mar 26, 2008 11:28 pm Post subject: |
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| keith wrote: | There is an XYZ-wing that takes out <5> in R1C2, then an XY-wing that takes out <9> in R7C6.
Keith |
Well, I did finally find the XYZ wing that Keith points out. Nice job finding that Keith! The xyz is 458 at R1C3. This links 58 at R2C3 and 45 at R1C7. R1C2 (245) can "see" the 5 in all three cells. Ergo, bye-bye 5 in R1C2, leaving 24 in R1C2.
Then Keith's XYwing relies on R1C2 as the pivot with R1C6 and R7C2 bearing 9-pincers that forces removal of 9 from R7C6.
This my blind-mind can see, at last. |
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Mindwarp
Joined: 13 Sep 2007
Posts: 25
Location: St. Ives, England
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| Posted: Thu Mar 27, 2008 12:42 am Post subject: |
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| cgordon wrote: | ... same sequence for me.
| Quote: | | I used the Robert the Bruce technique on R5C4! That solved it for me. |
Am I missing something? What connection does the Scotsman, Robert Bruce have with Sudokus. Spiders maybe?? Invasion of Ireland 1315? (No that was his brother Ted). Picking on Englishmen like me maybe? As with some of the responses to my posts. |
Simple "If at first you don't succeed try, try again." If 5 doesn't work try 7, if that doesn't work try 9. It worked for me. |
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cgordon
Joined: 04 May 2007
Posts: 769
Location: ontario, canada
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| Posted: Thu Mar 27, 2008 12:56 pm Post subject: |
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| Quote: | | Simple "If at first you don't succeed try, try again." |
Yes I remember now. Bruce was watching a spider having difficulty making a web - and he made that quote just before beating up the English tourists in Scotland in 1313.
He should have stayed at home with his whiskey and Sudokus. |
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gohast
Joined: 26 Sep 2006
Posts: 18
Location: Dublin, Ireland
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| Posted: Thu Mar 27, 2008 1:02 pm Post subject: |
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| cgordon wrote: | | Quote: | | Simple "If at first you don't succeed try, try again." |
Yes I remember now. Bruce was watching a spider having difficulty making a web - and he made that quote just before beating up the English tourists in Scotland in 1313.
He should have stayed at home with his whiskey and Sudokus. |
Oops  you mean Whisky and Sudokus. (The difference is quite important for the Scots, they don't like admitting that the Irish invented Whiskey, and spell it properly ) |
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