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prakash
Joined: 02 Jan 2008 Posts: 67 Location: New Jersey, USA
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Posted: Wed Jun 04, 2008 11:59 pm Post subject: |
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Norm - Just wondering what tool you were using to generate the visual. I would love to have somthing like that when I try to do it with PP. I cannot seem to print with Markups. |
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storm_norm
Joined: 18 Oct 2007 Posts: 1741
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Posted: Thu Jun 05, 2008 1:19 am Post subject: |
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prakash,
there are several programs you can use.
personally, i would suggest "Sudoku Susser".
you can get here...
http://www.madoverlord.com/projects/sudoku.t
the image you see in my posts are generated by saving a screen shot of another sudoku assisting program named "sudocue".
you can get here...
http://www.sudocue.net/download.php
and another very good assisting program is "Sudoku Explainer"
you can get here...
http://diuf.unifr.ch/people/juillera/Sudoku/Sudoku.html
just a note about "Sudoku Explainer". I had to make sure I installed Java runtime 5 or greater for it to run. so you might want to make sure and get all the updates for Java. |
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keith
Joined: 19 Sep 2005 Posts: 3355 Location: near Detroit, Michigan, USA
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Posted: Sun Jun 08, 2008 12:30 pm Post subject: |
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I only did this one yesterday: Code: | +------------+---------+------------+
| 39 4 1 | 5 6 8 | 2 39 7 |
| 36 68 7 | 2 9 1 | 4 38 5 |
| 29 258 59@| 3 4 7 |69@ 1 689 |
+------------+---------+------------+
| 5 7 8 | 9 2 4 | 3 6 1 |
| 4 3 6 | 1 7 5 | 8 29 29 |
| 1 9 2 | 8 3 6 | 5 7 4 |
+------------+---------+------------+
|269$ 1 4 | 7 58 29 |69# 58 3 |
| 8 256 59#| 4 1 3 | 7 259$ 269$|
| 7 25 3 | 6 58 29 | 1 4 289 |
+------------+---------+------------+ | There is an incredibly obvious skyscraper - any cell ($) that sees both cells # cannot be <9>.
Which opens up a (29, 26, 69) XY-wing in C1 R7, taking out <9> in R3C7.
Keith
Last edited by keith on Mon Jun 09, 2008 3:53 am; edited 1 time in total |
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nataraj
Joined: 03 Aug 2007 Posts: 1048 Location: near Vienna, Austria
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Posted: Sun Jun 08, 2008 8:54 pm Post subject: |
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keith wrote: | incredibly obvious |
go ahead ... rub it in ... can't believe I missed that. Guess I was past the point of looking for coloring solutions. |
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keith
Joined: 19 Sep 2005 Posts: 3355 Location: near Detroit, Michigan, USA
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Posted: Sun Jun 08, 2008 11:56 pm Post subject: |
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nataraj wrote: | keith wrote: | incredibly obvious |
go ahead ... rub it in ... can't believe I missed that. Guess I was past the point of looking for coloring solutions. |
nataraj: "Rub it in?" Not at all.
As is my usual procedure, I start only with two-candidate pencil marks. So, I found the skyscraper pairs before I knew what they might eliminate.
I was surprised. Usually, the usefulness of these possible skyscrapers is taken up by box-line interactions.
Keith |
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Glassman
Joined: 21 Oct 2005 Posts: 50 Location: England
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Posted: Wed Jun 18, 2008 1:42 pm Post subject: |
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keith wrote: | ... There is an incredibly obvious skyscraper ... Which opens up a (29, 26, 69) XY-wing in C1 R7, taking out <9> in R3C7. |
I read this topic with some disbelief — they do like complicated methods — then, at last, I found that you, Keith, had also seen the skyscraper!
... which also opened up a second xy-wing with pivot at r8c9, eliminating the 9 at r9c9.
Glassman |
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