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Earl
Joined: 30 May 2007
Posts: 677
Location: Victoria, KS
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 Posted: Wed Sep 26, 2007 1:40 pm Post subject: Sept 25 VH |
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Two X-wings did it for me.
Earl |
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Johan
Joined: 25 Jun 2007
Posts: 206
Location: Bornem Belgium
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| Posted: Wed Sep 26, 2007 2:05 pm Post subject: |
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| Also needed two X-wings, probably the same as Earl. |
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eddieg
Joined: 12 Jan 2006
Posts: 47
Location: San Diego, CA USA
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| Posted: Wed Sep 26, 2007 3:12 pm Post subject: Sept 26th here |
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| Little snark in the morning on left side of United States. |
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sdq_pete
Joined: 30 Apr 2007
Posts: 119
Location: Rotterdam, NL
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| Posted: Wed Sep 26, 2007 4:37 pm Post subject: VH Sept 26 |
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Stuck again. I'm here:
| Code: |
+--------------+----------------+------------+
| 23679 8 23 | 3679 13679 137 | 4 569 56 |
| 5679 567 69 | 679 8 4 | 3 2 1 |
| 1369 136 4 | 5 369 2 | 7 69 8 |
+--------------+----------------+------------+
| 39 2 5 | 8 39 6 | 1 4 7 |
| 8 4 69 | 279 179 157 | 26 56 3 |
| 367 367 1 | 4 23 35 | 9 8 256 |
+--------------+----------------+------------+
| 4 36 8 | 1 236 9 | 5 7 26 |
| 236 9 23 | 367 5 37 | 8 1 4 |
| 15 15 7 | 26 4 8 | 26 3 9 |
+--------------+----------------+------------+
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Play this puzzle online at the Daily Sudoku site
What next?
Peter |
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cgordon
Joined: 04 May 2007
Posts: 769
Location: ontario, canada
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| Posted: Wed Sep 26, 2007 5:51 pm Post subject: |
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| Quote: | | Two X-wings did it for me. |
Actually, I just needed the one - for 3s in C34. |
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sdq_pete
Joined: 30 Apr 2007
Posts: 119
Location: Rotterdam, NL
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| Posted: Wed Sep 26, 2007 6:38 pm Post subject: |
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Agggh!! Why didn't I see that?? Don't answer.
P. |
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shoeless
Joined: 03 Aug 2007
Posts: 13
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| Posted: Wed Sep 26, 2007 8:19 pm Post subject: |
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I can't even get that far...how did you get rid of the 4's & 7's in the 4th row? I'm stuck here:
| Code: |
+----------------+---------------+-------------+
| 125679 8 23 | 3679 1679 137 | 4 1569 156 |
| 15679 1567 69 | 679 8 4 | 3 2 156 |
| 1369 136 4 | 5 1369 2 | 7 169 8 |
+----------------+---------------+-------------+
| 39 2 5 | 8 39 6 | 1 47 47 |
| 8 4 69 | 279 179 157 | 26 56 3 |
| 367 367 1 | 4 23 35 | 9 8 256 |
+----------------+---------------+-------------+
| 4 36 8 | 1 236 9 | 5 67 267 |
| 26 9 23 | 367 5 37 | 8 14 14 |
| 15 15 7 | 26 4 8 | 26 3 9 |
+----------------+---------------+-------------+
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Play this puzzle online at the Daily Sudoku site
Can someone enlighten me on the C34 notation? What does that mean...columns 3 & 4? |
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Florida Bob
Joined: 25 Jul 2007
Posts: 12
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| Posted: Wed Sep 26, 2007 8:56 pm Post subject: |
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| I was also stopped at the same spot. Also, how were the 1's eliminated in row 2? |
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TKiel
Joined: 22 Feb 2006
Posts: 292
Location: Kalamazoo, MI
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| Posted: Wed Sep 26, 2007 9:06 pm Post subject: |
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| Quote: | | What does that mean...columns 3 & 4? |
Yes.
| Quote: | | ...how did you get rid of the 4's & 7's in the 4th row? |
Without knowing sdq_pete's candidate grid it's hard to know how he solved those two cells but it's not necessary to have them solved to use the X-wing that others referred too.
| Quote: | | ...how were the 1's eliminated in row 2? |
Same as above. |
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Marty R.
Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA
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| Posted: Wed Sep 26, 2007 9:27 pm Post subject: |
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Shoeless,
If you play the X-Wing on 3 in columns 3 and 4 and make a chain of eliminations, you arrive here:
| Code: | +----------------+---------------+-------------+
| 125679 8 23 | 3679 1679 1 | 4 1569 16 |
| 15679 1567 69 | 679 8 4 | 3 2 16 |
| 1369 136 4 | 5 1369 2 | 7 169 8 |
+----------------+---------------+-------------+
| 3 2 5 | 8 9 6 | 1 47 47 |
| 8 4 69 | 279 179 5 | 2 6 3 |
| 367 367 1 | 4 2 3 | 9 8 5 |
+----------------+---------------+-------------+
| 4 36 8 | 1 236 9 | 5 67 267 |
| 26 9 23 | 36 5 7 | 8 14 14 |
| 15 15 7 | 26 4 8 | 26 3 9 |
+----------------+---------------+-------------+ |
Using the 1 in r1c6 or the 16 pair in column 9, the 47 pair in row 4 is quickly solved. |
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sdq_pete
Joined: 30 Apr 2007
Posts: 119
Location: Rotterdam, NL
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| Posted: Thu Sep 27, 2007 10:58 am Post subject: |
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| shoeless wrote: | | I can't even get that far... |
Just by way of a reply, I went through it again but couldn't now see how I reached that position! Clearly, the strong move is the column X-wing on 3's. This X-wing shouldn't be hard to spot if one searches systematically, but then that goes for any X-construction. In this case I suspect I (subconsciously) discounted the possibility of an X-wing on 3's simply because there so many candidate 3's in the puzzle - clearly a pitfall to avoid in future!
Peter |
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shoeless
Joined: 03 Aug 2007
Posts: 13
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| Posted: Thu Sep 27, 2007 1:03 pm Post subject: |
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| Thanks guys...I just wasn't seeing it. Once you get rid of the 3's in C6 it solves pretty easily. |
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duffy
Joined: 13 Sep 2007
Posts: 26
Location: Toronto Canada
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| Posted: Thu Sep 27, 2007 5:07 pm Post subject: |
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"Sept 25 VH" should of course read "Sept 26 VH". I guess it is difficult to edit a title for a New Topic posting once it is in place.
Don D. |
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