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wapati
Joined: 10 Jun 2008
Posts: 472
Location: Brampton, Ontario, Canada.
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 Posted: Fri Jul 03, 2009 1:38 pm Post subject: W-W-W-Wings! |
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| Code: | 6 . .|. . .|. 7 .
. . 3|6 4 9|. . .
8 2 5|. . .|. . .
-----+-----+-----
. . .|. . 7|6 3 .
. . .|2 . 4|. . .
. 8 6|9 . .|. . .
-----+-----+-----
. . .|. . .|7 6 9
. . .|7 8 2|3 . .
. 5 .|. . .|. . 1 |
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arkietech
Joined: 31 Jul 2008
Posts: 1834
Location: Northwest Arkansas USA
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| Posted: Fri Jul 03, 2009 3:29 pm Post subject: |
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ur right  | Quote: | | w-wings 71, 45, 91 |
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Marty R.
Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA
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| Posted: Fri Jul 03, 2009 4:55 pm Post subject: |
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So are you, as in UR.
There was a potential DP on 25-28-58 in boxes 369. Just looking at the implications of the various candidates that could kill the DP was enough to solve the puzzle. |
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arkietech
Joined: 31 Jul 2008
Posts: 1834
Location: Northwest Arkansas USA
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| Posted: Fri Jul 03, 2009 6:59 pm Post subject: |
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| Marty ur good |
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wapati
Joined: 10 Jun 2008
Posts: 472
Location: Brampton, Ontario, Canada.
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| Posted: Fri Jul 03, 2009 8:36 pm Post subject: |
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| Marty R. wrote: |
There was a potential DP on 25-28-58 in boxes 369. Just looking at the implications of the various candidates that could kill the DP was enough to solve the puzzle. |
I don't follow.
To me the fact that one of r5c78 must be 9 ruins the DP. |
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Marty R.
Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA
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| Posted: Fri Jul 03, 2009 9:23 pm Post subject: |
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| Quote: | I don't follow.
To me the fact that one of r5c78 must be 9 ruins the DP. |
You may very well be right; I'm not exactly a Sudoku whiz. However, I have no intermediate grid, so I can't comment, and at least for the next few hours, I can't redo it. Maybe I'll try later and learn something.
Happy belated Canada Day.  |
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Marty R.
Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA
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| Posted: Fri Jul 03, 2009 11:09 pm Post subject: |
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OK, I redid it. I thought I had an obligation for the evening that it turned out that I didn't.
This is where basics took me and I just don't understand how the 9 in r5c78 breaks up the DP. I'm not saying it doesn't, I'm just saying I don't understand. I'm working on a DP of 58-25-28 in r269c78.
| Code: |
+-------------+-------------+-------------+
| 6 49 49 | 5 2 8 | 1 7 3 |
| 17 17 3 | 6 4 9 | 258 258 28 |
| 8 2 5 | 13 7 13 | 49 49 6 |
+-------------+-------------+-------------+
| 1459 149 2 | 8 15 7 | 6 3 45 |
| 1357 137 17 | 2 6 4 | 589 1589 78 |
| 1457 8 6 | 9 135 135 | 245 1245 27 |
+-------------+-------------+-------------+
| 2 34 8 | 134 135 135 | 7 6 9 |
| 19 6 19 | 7 8 2 | 3 45 45 |
| 347 5 47 | 34 9 6 | 28 28 1 |
+-------------+-------------+-------------+
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Play this puzzle online at the Daily Sudoku site |
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wapati
Joined: 10 Jun 2008
Posts: 472
Location: Brampton, Ontario, Canada.
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| Posted: Sat Jul 04, 2009 12:42 am Post subject: |
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Well, one of r5c78 must be a 9.
The set of 258 is broken by that. |
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Marty R.
Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA
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| Posted: Sat Jul 04, 2009 1:01 am Post subject: |
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| wapati wrote: | Well, one of r5c78 must be a 9.
The set of 258 is broken by that. |
Yes, that's what you said earlier. What I see is that if r5c8=9, then there is a Type 1 on 28. But if r5c7=9, then I don't see the breakup. |
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tlanglet
Joined: 17 Oct 2007
Posts: 2468
Location: Northern California Foothills
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| Posted: Sat Jul 04, 2009 1:22 am Post subject: |
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| arkietech wrote: | ur right | Quote: | | w-wings 71, 45, 91 |
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Dan, I seem to have a mental block recently finding W-wings. In this case, I found your first one, but do not see the second w-wing that you posted.
Please help. (And yes, I did start the July4 celebration somewhat early.)
Ted |
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wapati
Joined: 10 Jun 2008
Posts: 472
Location: Brampton, Ontario, Canada.
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| Posted: Sat Jul 04, 2009 1:36 am Post subject: |
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I was on the wrong 258s.
I am not sure that that helps me. 
I finally found it, Danny's comment below sparked a light for me.
Last edited by wapati on Sat Jul 04, 2009 1:21 pm; edited 1 time in total |
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arkietech
Joined: 31 Jul 2008
Posts: 1834
Location: Northwest Arkansas USA
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| Posted: Sat Jul 04, 2009 2:49 am Post subject: |
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| tlanglet wrote: | | Dan, I seem to have a mental block recently finding W-wings. In this case, I found your first one, but do not see the second w-wing that you posted. |
I could not find it either. There are so many w-wings I got lost.
try a w-wing 17 => r456c1<>1 then an xy_wing 954 =>r6c7<>4 along with the three w-wings to solve it --- I think 
Thanks for keeping me straight--
Have a good 4th! |
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daj95376
Joined: 23 Aug 2008
Posts: 3854
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| Posted: Sat Jul 04, 2009 3:46 am Post subject: |
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| Marty R. wrote: | I'm working on a DP of 58-25-28 in r269c78.
| Code: |
+-------------+-------------+-------------+
| 6 49 49 | 5 2 8 | 1 7 3 |
| 17 17 3 | 6 4 9 | 258 258 28 |
| 8 2 5 | 13 7 13 | 49 49 6 |
+-------------+-------------+-------------+
| 1459 149 2 | 8 15 7 | 6 3 45 |
| 1357 137 17 | 2 6 4 | 589 1589 78 |
| 1457 8 6 | 9 135 135 | 245 1245 27 |
+-------------+-------------+-------------+
| 2 34 8 | 134 135 135 | 7 6 9 |
| 19 6 19 | 7 8 2 | 3 45 45 |
| 347 5 47 | 34 9 6 | 28 28 1 |
+-------------+-------------+-------------+
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Nice DP  After initially missing some obvious implications, I managed to finally get [r4c5]=1 from it. |
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tlanglet
Joined: 17 Oct 2007
Posts: 2468
Location: Northern California Foothills
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| Posted: Sat Jul 04, 2009 3:48 am Post subject: |
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| Marty R. wrote: |
So are you, as in UR.
There was a potential DP on 25-28-58 in boxes 369. Just looking at the implications of the various candidates that could kill the DP was enough to solve the puzzle. |
Marty, I got lost/confused looking at the implication of the various candidats that could kill the DP.
Would you please provide some insight.
Thanks......
Ted |
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tlanglet
Joined: 17 Oct 2007
Posts: 2468
Location: Northern California Foothills
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| Posted: Sat Jul 04, 2009 4:43 am Post subject: |
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Marty, given a clue by Danny, I was able to follow all the implications.
Fantastic
Ted |
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