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Jun 3, 2007 VH
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jLo



Joined: 30 Apr 2007
Posts: 55

PostPosted: Sun Jun 03, 2007 8:05 am    Post subject: Jun 3, 2007 VH Reply with quote

Code:

------------------------------------------------------------
259                : 569         69     :       59
59                 :       59           :
      259          :                    : 25          29
............................................................
      257   45     :       27           :       47
2379  2379         :       279          :             23
23479 2379         :             279    : 23    47
............................................................
457         45     :       24579 279    :       259
      357          : 59    4579         : 35          349
34                 : 56          26     :       25    34
------------------------------------------------------------


Ignoring the fact that R1C1=2, do we know that R6c1=4 given
all the 2379's revolving around it?
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George Woods



Joined: 28 Mar 2006
Posts: 304
Location: Dorset UK

PostPosted: Sun Jun 03, 2007 9:40 pm    Post subject: Another Maverick solution! Reply with quote

Code:

+-------+-----------+-------+
| . 8 7 | 569 3  69 | 4 . . |
| . 4 1 | 2   59 8  | 6 3 7 |
| 6 . 3 | 7   1  4  | . 8 . |
+-------+-----------+-------+
| 1 . . | 8   .  3  | 9 . 6 |
| . . 6 | 4   .  5  | 8 . . |
| . . 8 | 1   6  .  | . . 5 |
+-------+-----------+-------+
| . 6 . | 3   .  .  | 1 . 8 |
| 8 . 2 | 59  .  1  | . 6 . |
| . 1 9 |     8  26 | 7 . . |
+-------+-----------+-------+

[url=http://www.dailysudoku.com/sudoku/play.shtml?p=0:8:7:569:3:69:4:0:0:0:4:1:2:59:8:6:3:7:6:0:3:7:1:4:0:8:0:1:0:0:8:0:3:9:0:6:0:0:6:4:0:5:8:0:0:0:0:8:1:6:0:0:0:5:0:6:0:3:0:0:1:0:8:8:0:2:59:0:1:0:6:0:0:1:9: :8:26:7:0:0:]Play this puzzle online[/url] at the Daily Sudoku site
Wow I couldn't even get to the crunch point shown by JLO
BUT I noted that a 9 in r2c5 solves box 2 and from there the 2 and 9 in Box 8 create a 29 pair
bearing down impossibly on box9 so r7c8 has to be both 2 and 9.
so r2c5 must be 5 and hence we have a solution!

So I am going to be accused of using a forcing function or trial and error BUT I did spot it "in my head" and not via pencil!
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headhog



Joined: 04 Jun 2007
Posts: 1
Location: Virginia, USA

PostPosted: Mon Jun 04, 2007 2:24 am    Post subject: Reply with quote

r1c1 is a 2. X-Wing of 5's in Cols 4 & 8
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jLo



Joined: 30 Apr 2007
Posts: 55

PostPosted: Mon Jun 04, 2007 2:59 am    Post subject: Reply with quote

Quote:

r1c1 is a 2. X-Wing of 5's in Cols 4 & 8


I see r1c1 and I see the X-Wing. The question is whether or
not there is any direct line of reasoning that allows you to place
a 4 at R6C1, opening another path to a solution. It just seems to
be hanging there begging to be picked off.
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Marty R.



Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA

PostPosted: Mon Jun 04, 2007 4:57 am    Post subject: Reply with quote

Code:
------------------------------------------------------------
259                : 569         69     :       59
59                 :       59           :
      259          :                    : 25          29
............................................................
      257   45     :       27           :       47
2379  2379         :       279          :             23
23479 2379         :             279    : 23    47
............................................................
457         45     :       24579 279    :       259
      357          : 59    4579         : 35          349
34                 : 56          26     :       25    34
------------------------------------------------------------


For what it's worth, I just completed the puzzle and what broke it open for me was the strong links (skyscraper) on 9 in columns 4 and 9 which takes out the 9 from r1c8.
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sdq_pete



Joined: 30 Apr 2007
Posts: 119
Location: Rotterdam, NL

PostPosted: Mon Jun 04, 2007 10:55 am    Post subject: Reply with quote

Personally I found this a particularly easy one! Perhaps it's the way the cookie crumbles on a particular day. Anyway, following the basic eliminations, the X-wing on 5's presented itself without any searching (the first two 5's being easily spotted on the first row) and from there on plain sailing.

Peter
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cgordon



Joined: 04 May 2007
Posts: 769
Location: ontario, canada

PostPosted: Mon Jun 04, 2007 11:34 am    Post subject: Reply with quote

I've bragged before that a couple of the very hard puzzles were easy - only to find I'd screwed up and got lucky. But this time I have to agree with sqd pete - this was an easy one. There seemed to be a plethora of easy to spot skyscrapers. Didn't have to look for any xy or xyz wings. Or maybe I did screw up and just got lucky again!
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George Woods



Joined: 28 Mar 2006
Posts: 304
Location: Dorset UK

PostPosted: Mon Jun 04, 2007 11:45 am    Post subject: Foxed withis one Reply with quote

Ok I solved it in an "Unofficial way", but trying to do it "properly" I cannot see how the 1 in Box 6 is deduced (OK I can do it by considering the effect of each 3 in box 6 - but that is again a forcing function)
so HELP!

Incidentally is it my computer or a change in the forum software?. I find that the sentences now seem to be on one line instead of "wrapping around", and that makes them hard to read and impossible to print in full!
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George Woods



Joined: 28 Mar 2006
Posts: 304
Location: Dorset UK

PostPosted: Mon Jun 04, 2007 12:03 pm    Post subject: my previous question Reply with quote

Saw it once I had typed my request
Sorry Folks
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cgordon



Joined: 04 May 2007
Posts: 769
Location: ontario, canada

PostPosted: Mon Jun 04, 2007 12:19 pm    Post subject: Reply with quote

After initial straightforward eliminations, I was left with x wings on 6s in rows 6 & 9. That was the only "hard" level step. The rest was continued straightforward elimination. The 1 in box 6 ended up as part of a triple -
47, 17, 47.

Yes - the new format is awkward to read.
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Angel



Joined: 26 Mar 2006
Posts: 31

PostPosted: Mon Jun 04, 2007 3:12 pm    Post subject: Reply with quote

George, I think the reason this thread is so hard to read is because there is one post that has an excessively long line that cannot easily be split as it has no spaces - this is the long string in your first post on this thread.

Once any line is too long to fit on a screen, all posts in a thread are displayed at the width of that long line.

If you edit your post in some way to split the string, display it in a smaller font, or remove it altogether this may put it right. I'm not absolutely sure this will work - I suppose it's possible that once a thread has been 'widened' it always stays that way, but it may be worth a try.
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Mogulmeister



Joined: 03 May 2007
Posts: 700

PostPosted: Mon Jun 04, 2007 3:36 pm    Post subject: Reply with quote

Quite so Angel - I have accidentally done it myself on occasion. The post that caused this thread (only) to elongate horizontally was probably jLo's original which seemed to have an inordinately long margin. Easily done !
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Marty R.



Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA

PostPosted: Mon Jun 04, 2007 3:49 pm    Post subject: Reply with quote

cgordon wrote:
After initial straightforward eliminations, I was left with x wings on 6s in rows 6 & 9. That was the only "hard" level step. The rest was continued straightforward elimination. The 1 in box 6 ended up as part of a triple - 47, 17, 47.


Just maybe a technicality, but that's a naked pair, not a triple.
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Mogulmeister



Joined: 03 May 2007
Posts: 700

PostPosted: Mon Jun 04, 2007 4:13 pm    Post subject: Reply with quote

But aren't there three candidates ?
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Mogulmeister



Joined: 03 May 2007
Posts: 700

PostPosted: Mon Jun 04, 2007 4:15 pm    Post subject: Reply with quote

(joke) Very Happy
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Angel



Joined: 26 Mar 2006
Posts: 31

PostPosted: Mon Jun 04, 2007 4:22 pm    Post subject: Reply with quote

Mogulmeister wrote:
The post that caused this thread (only) to elongate horizontally was probably jLo's original which seemed to have an inordinately long margin.


I can't remember if jLo's post had that long margin originally or not. If so then you're probably right (sorry George!). I wasn't sure if the white boxes get stretched automatically to match the required width.

Either way it's only this thread that's affected.
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KSipher



Joined: 24 Sep 2006
Posts: 38

PostPosted: Tue Jun 05, 2007 1:53 am    Post subject: Reply with quote

Darn, just when I get to the point where I think I am starting to understand, I get knocked down again. I cannot find a next move. I don't think I am at the point where I can find the mentioned xwings. And I can usually understand a skyscraper but can nev er find them myself. Can someone get me started again on this puzzle. Here is where I am:

Kathy

Code:

+---------------+---------------+-------------+
| 259   8    7  | 569 3     69  | 4  1259 129 |
| 59    4    1  | 2   59    8   | 6  3    7   |
| 6     259  3  | 7   1     4   | 25 8    29  |
+---------------+---------------+-------------+
| 1     257  45 | 8   27    3   | 9  247  6   |
| 2379  2379 6  | 4   279   5   | 8  127  123 |
| 23479 2379 8  | 1   6     279 | 23 247  5   |
+---------------+---------------+-------------+
| 457   6    45 | 3   24579 279 | 1  2459 8   |
| 8     357  2  | 59  4579  1   | 35 6    349 |
| 345   1    9  | 56  8     26  | 7  245  234 |
+---------------+---------------+-------------+

Play this puzzle online at the Daily Sudoku site
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jLo



Joined: 30 Apr 2007
Posts: 55

PostPosted: Tue Jun 05, 2007 3:54 am    Post subject: Reply with quote

Quote:

Darn, just when I get to the point where I think I am starting to understand, I get knocked down again. I cannot find a next move. I don't think I am at the point where I can find the mentioned xwings. And I can usually understand a skyscraper but can nev er find them myself. Can someone get me started again on this puzzle. Here is where I am:



Do some eliminations in column 8, followed by some eliminations in row 9,
followed by more eliminations in column 8. You end up with a naked pair
that solves r5c8. After that it is pretty clear sailinig to the X-Wing.
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Marty R.



Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA

PostPosted: Tue Jun 05, 2007 3:56 am    Post subject: Reply with quote

KSipher wrote:
Darn, just when I get to the point where I think I am starting to understand, I get knocked down again. I cannot find a next move. I don't think I am at the point where I can find the mentioned xwings. And I can usually understand a skyscraper but can nev er find them myself. Can someone get me started again on this puzzle. Here is where I am:

Kathy

Code:

+---------------+---------------+-------------+
| 259   8    7  | 569 3     69  | 4  1259 129 |
| 59    4    1  | 2   59    8   | 6  3    7   |
| 6     259  3  | 7   1     4   | 25 8    29  |
+---------------+---------------+-------------+
| 1     257  45 | 8   27    3   | 9  247  6   |
| 2379  2379 6  | 4   279   5   | 8  127  123 |
| 23479 2379 8  | 1   6     279 | 23 247  5   |
+---------------+---------------+-------------+
| 457   6    45 | 3   24579 279 | 1  2459 8   |
| 8     357  2  | 59  4579  1   | 35 6    349 |
| 345   1    9  | 56  8     26  | 7  245  234 |
+---------------+---------------+-------------+

Play this puzzle online at the Daily Sudoku site


Kathy,

There are a few things, but I don't know how far they take you.

1) In column 9, the 4s are limited to box 9, so other 4s in that box get eliminated.

2) That exposes a 35-25-23 XY-Wing based in r8c7.

3) There is a skyscraper on 9 in columns 4 and 8.

Good luck.
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KSipher



Joined: 24 Sep 2006
Posts: 38

PostPosted: Tue Jun 05, 2007 4:47 pm    Post subject: Reply with quote

Thanks for the help. I can get to this point and then I don't see the skyscraper in columns 4 and 8. Can you explain this step to me? Thanks so much!

Kathy

Code:

+---------------+---------------+-------------+
| 259   8    7  | 569 3     69  | 4  1259 129 |
| 59    4    1  | 2   59    8   | 6  3    7   |
| 6     259  3  | 7   1     4   | 25 8    29  |
+---------------+---------------+-------------+
| 1     257  45 | 8   27    3   | 9  247  6   |
| 2379  2379 6  | 4   279   5   | 8  127  123 |
| 23479 2379 8  | 1   6     279 | 23 47   5   |
+---------------+---------------+-------------+
| 457   6    45 | 3   24579 279 | 1  259  8   |
| 8     357  2  | 59  4579  1   | 35 6    349 |
| 34    1    9  | 56  8     26  | 7  25   34  |
+---------------+---------------+-------------+
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