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Earl
Joined: 30 May 2007
Posts: 677
Location: Victoria, KS
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 Posted: Mon Dec 08, 2008 3:27 am Post subject: Dec 8 VH |
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XY-wing (128).
Earl |
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sdq_pete
Joined: 30 Apr 2007
Posts: 119
Location: Rotterdam, NL
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| Posted: Mon Dec 08, 2008 11:23 am Post subject: |
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Well, for the second time in succession, no advanced techniques at all and very quick (by my standards)...
Peter |
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cgordon
Joined: 04 May 2007
Posts: 769
Location: ontario, canada
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| Posted: Mon Dec 08, 2008 2:13 pm Post subject: |
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Same here.
| Quote: | | Well, for the second time in succession, no advanced techniques at all and very quick (by my standards)... |
That's twice in a row you got lucky. I can't remember when that last happened to me.... |
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Wendy W
Joined: 04 Feb 2008
Posts: 144
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| Posted: Tue Dec 09, 2008 1:34 am Post subject: |
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| Just like you guys, all I needed was the xy 128 and it completely fell apart. Yawn. |
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sdq_pete
Joined: 30 Apr 2007
Posts: 119
Location: Rotterdam, NL
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| Posted: Tue Dec 09, 2008 11:31 am Post subject: |
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I think I shall have to install a keystroke recorder...
Peter |
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KSipher
Joined: 24 Sep 2006
Posts: 38
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| Posted: Wed Dec 10, 2008 4:19 am Post subject: |
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So, now I feel pretty foolish, but I am stuck here. I can't find an xy wing and have searched and searched. Can someone please ease my pain. Thanks.
Kathy
| Code: |
+-------------+--------+----------------+
| 47 78 48 | 3 2 6 | 9 1 5 |
| 25 56 1 | 4 9 8 | 7 26 3 |
| 23 9 236 | 7 5 1 | 4 268 268 |
+-------------+--------+----------------+
| 59 56 7 | 8 1 4 | 26 3 269 |
| 1 2 68 | 9 3 7 | 68 5 4 |
| 389 4 38 | 5 6 2 | 1 89 7 |
+-------------+--------+----------------+
| 238 138 9 | 12 4 5 | 2368 7 1268 |
| 6 18 248 | 12 7 3 | 5 2489 1289 |
| 47 137 5 | 6 8 9 | 23 24 12 |
+-------------+--------+----------------+
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Play this puzzle online at the Daily Sudoku site |
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daj95376
Joined: 23 Aug 2008
Posts: 3854
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| Posted: Wed Dec 10, 2008 4:31 am Post subject: |
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| KSipher wrote: | | So, now I feel pretty foolish, but I am stuck here. I can't find an xy wing and have searched and searched. Can someone please ease my pain. Thanks. |
Hello Kathy,
The reason you can't find an XY-Wing is that you still need to perform a Locked Candidate 2 elimination to expose two XY-Wings. Either XY-Wing will then crack the puzzle.
Note: there are 3x Locked Candidate 2 present in your PM, but only one exposes the XY-Wings.
Regards, Danny
FWIW: There is a Skyscraper in your current PM that'll bypass everything I said above ... and crack the puzzle. |
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DennyOR
Joined: 12 Sep 2007
Posts: 33
Location: Portland, Oregon
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| Posted: Wed Dec 10, 2008 10:27 pm Post subject: |
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| Or to put it another way that I can understand, the center column in box 7 must contain the 3 in that box since the rest of that column in the boxes above it doesn't contain a 3. Therefore, the 3 can be removed as a possible choice for the r7c1 cell, setting up the 21-18-82 xy-wing which makes r7c4 a 1. |
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KSipher
Joined: 24 Sep 2006
Posts: 38
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| Posted: Sun Dec 14, 2008 4:22 am Post subject: |
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Relief!!! I now see what I missed and can finish it off. Thanks for the help.
Now if you could just help me with my Christmas shopping ! 
Kathy |
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