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kuskey
Joined: 10 Dec 2008
Posts: 141
Location: Pembroke, NH
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 Posted: Fri Feb 11, 2011 5:12 am Post subject: Feb 11 VH |
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| A UR on 78 forces r3c1<>19. |
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roaa
Joined: 18 Apr 2009
Posts: 112
Location: Sweden
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| Posted: Fri Feb 11, 2011 7:58 am Post subject: |
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| An x-wing on 1:s solves it |
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cgordon
Joined: 04 May 2007
Posts: 769
Location: ontario, canada
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| Posted: Fri Feb 11, 2011 12:39 pm Post subject: |
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I see the UR on 78 as a Type 4. (since there are only two 7s in C2/Box 1 you can remove the 8s).
There's also a skyscraper on 6. |
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Marty R.
Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA
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| Posted: Fri Feb 11, 2011 4:44 pm Post subject: |
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| cgordon wrote: | I see the UR on 78 as a Type 4. (since there are only two 7s in C2/Box 1 you can remove the 8s).
There's also a skyscraper on 6. |
On my grid the four cells are 78-78-78-3789, making it a Type 1. After removing 78 from the polyvalue cell, box 1 is left with a 139 triple which removes 19 from r3c1, as Kuskey mentions. |
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Clement
Joined: 24 Apr 2006
Posts: 1111
Location: Dar es Salaam Tanzania
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| Posted: Fri Feb 11, 2011 5:59 pm Post subject: Feb 11 VH |
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| Not forgeting the XY-Wing 56 59 69 pivoted in r3c7 removing 6 in r7c9 which solves it as well. |
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keith
Joined: 19 Sep 2005
Posts: 3355
Location: near Detroit, Michigan, USA
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| Posted: Fri Feb 11, 2011 6:29 pm Post subject: |
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After basics: | Code: | +----------------+----------------+----------------+
| 6 4 2 | 5 1 9 | 3 7 8 |
| 5 78 19 | 3 2 78 | 4 16 69 |
| 189 3789 139 | 6 4 78 | 59 125 259 |
+----------------+----------------+----------------+
| 2 1 4 | 9 35 6 | 8 35 7 |
| 3 5689 69 | 7 58 2 | 569 4 1 |
| 89 5689 7 | 4 358 1 | 2 356 569 |
+----------------+----------------+----------------+
| 4 36 136 | 12 9 5 | 7 8 26 |
| 19 69 8 | 12 7 4 | 56 256 3 |
| 7 2 5 | 8 6 3 | 1 9 4 |
+----------------+----------------+----------------+ |
By the way, I don't see an X-wing.
There is also a 56-9 XY-wing in the grid above, which does not solve the puzzle.
Keith |
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cgordon
Joined: 04 May 2007
Posts: 769
Location: ontario, canada
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| Posted: Fri Feb 11, 2011 8:39 pm Post subject: |
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| Quote: | | On my grid the four cells are 78-78-78-3789, making it a Type 1. After removing 78 from the polyvalue cell, box 1 is left with a 139 triple |
I did my Type 4 before spotting the triple in R2 -so you could say I expeditiously saved finding two triples - or you could say I didn't do the basics properly. |
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Clement
Joined: 24 Apr 2006
Posts: 1111
Location: Dar es Salaam Tanzania
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| Posted: Sat Feb 12, 2011 7:51 am Post subject: Feb 11 VH |
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Keith Wrote:-
"There is also a 56-9 XY-wing in the grid above, which does not solve the puzzle".
I have checked it twice Keith. The XY-Wing 56 59 69 solves it |
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keith
Joined: 19 Sep 2005
Posts: 3355
Location: near Detroit, Michigan, USA
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| Posted: Sat Feb 12, 2011 2:33 pm Post subject: Re: Feb 11 VH |
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| Clement wrote: | Keith Wrote:-
"There is also a 56-9 XY-wing in the grid above, which does not solve the puzzle".
I have checked it twice Keith. The XY-Wing 56 59 69 solves it |
I said ALSO.
The 569 XY-wing in C7 R8 which takes out 9 in R3C2 does not solve it.
Keith |
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