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Nov 17, 2008 vh

 
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crunched



Joined: 05 Feb 2008
Posts: 168
PostPosted: Mon Nov 17, 2008 12:07 am    Post subject: Nov 17, 2008 vh Reply with quote
After basics, there is not much left. I used an xyz wing to advance to the solution.

Code:

+-----------+--------+--------+
| 9   4  7  | 2  6 3 | 8 5  1 |
| 3   26 26 | 8  1 5 | 9 4  7 |
| 15  58 18 | 4  9 7 | 6 2  3 |
+-----------+--------+--------+
| 26  26 4  | 3  7 9 | 1 8  5 |
| 8   9  5  | 1  4 2 | 7 3  6 |
| 7   1  3  | 6  5 8 | 2 9  4 |
+-----------+--------+--------+
| 16  57 9  | 57 2 4 | 3 16 8 |
| 4   78 68 | 9  3 1 | 5 67 2 |
| 125 3  12 | 57 8 6 | 4 17 9 |
+-----------+--------+--------+

Play this puzzle online at the Daily Sudoku site
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storm_norm



Joined: 18 Oct 2007
Posts: 1741
PostPosted: Mon Nov 17, 2008 12:42 am    Post subject: Reply with quote
I hold insecticide.
I spray.
I conquer.
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Marty R.



Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA
PostPosted: Mon Nov 17, 2008 2:42 am    Post subject: Reply with quote
I saw four moves after basics, any of which would be a one-stepper.

XYZ on 125
BUG+1
XY on 681
XY on 162 with pincer transport
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tlanglet



Joined: 17 Oct 2007
Posts: 2468
Location: Northern California Foothills
PostPosted: Mon Nov 17, 2008 3:00 pm    Post subject: Reply with quote
Marty R. wrote:
I saw four moves after basics, any of which would be a one-stepper.

XYZ on 125
BUG+1
XY on 681
XY on 162 with pincer transport

Norm, I believe we have two xy-wings126; one with pivot <12> at r9c3 that deletes <6> at r8c3 and another one with pivot <16> at r7c1 that deletes <2> at r9c1. I did not spot one that used a pincer transport.

Ted
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cgordon



Joined: 04 May 2007
Posts: 769
Location: ontario, canada
PostPosted: Mon Nov 17, 2008 3:16 pm    Post subject: Reply with quote
.....and I don't see the Bug+1 as a one-stepper. So there!
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tlanglet



Joined: 17 Oct 2007
Posts: 2468
Location: Northern California Foothills
PostPosted: Mon Nov 17, 2008 3:55 pm    Post subject: Reply with quote
cgordon wrote:
.....and I don't see the Bug+1 as a one-stepper. So there!

Given the code posted by crunched, set r9c1=1 to prevent the BUG and you get naked singles all the way home. It is hard to lost in that maze.......

Ted
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daj95376



Joined: 23 Aug 2008
Posts: 3854
PostPosted: Mon Nov 17, 2008 3:56 pm    Post subject: Reply with quote
tlanglet wrote:
Marty R. wrote:
XY on 162 with pincer transport

I believe we have two xy-wings126; one with pivot <12> at r9c3 that deletes <6> at r8c3 and another one with pivot <16> at r7c1 that deletes <2> at r9c1. I did not spot one that used a pincer transport.

Code:
 (#) pivot
 (*) pincers
 (@) transport
 *--------------------------------------------------*
 | 9    4    7    | 2    6    3    | 8    5    1    |
 | 3   @26   6-2  | 8    1    5    | 9    4    7    |
 | 15   58   18   | 4    9    7    | 6    2    3    |
 |----------------+----------------+----------------|
 |*26  @26   4    | 3    7    9    | 1    8    5    |
 | 8    9    5    | 1    4    2    | 7    3    6    |
 | 7    1    3    | 6    5    8    | 2    9    4    |
 |----------------+----------------+----------------|
 |#16   57   9    | 57   2    4    | 3    16   8    |
 | 4    78   68   | 9    3    1    | 5    67   2    |
 | 125  3   *12   | 57   8    6    | 4    17   9    |
 *--------------------------------------------------*
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tlanglet



Joined: 17 Oct 2007
Posts: 2468
Location: Northern California Foothills
PostPosted: Mon Nov 17, 2008 4:12 pm    Post subject: Reply with quote
Thanks Danny for the info. Some times things are just too obvious!

Ted
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cgordon



Joined: 04 May 2007
Posts: 769
Location: ontario, canada
PostPosted: Mon Nov 17, 2008 4:22 pm    Post subject: Reply with quote
Quote:
Given the code posted by crunched, set r9c1=1 to prevent the BUG


Yeah - I had a senior moment. For a Bug+1 you KEEP the no. in the triple that is thrice seen - not remove it.
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Clement



Joined: 24 Apr 2006
Posts: 1111
Location: Dar es Salaam Tanzania
PostPosted: Mon Nov 17, 2008 4:33 pm    Post subject: Daily Sudoku: Mon 17-Nov-2008 VH Reply with quote
BUG + I leaving <1> in r9c1 OR XY-Wing 126 Pivot {1,2}r9c3 eliminating <6> in r8c3.
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storm_norm



Joined: 18 Oct 2007
Posts: 1741
PostPosted: Mon Nov 17, 2008 6:40 pm    Post subject: Reply with quote
not to get side tracked...
did anyone see the vanhegan extreme yesterday? I think that was one of the hardest I have seen in a while.
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cgordon



Joined: 04 May 2007
Posts: 769
Location: ontario, canada
PostPosted: Mon Nov 17, 2008 7:11 pm    Post subject: Reply with quote
Quote:
not to get side tracked...
did anyone see the vanhegan extreme yesterday? I think that was one of the hardest I have seen in a while.

You mean the Vanhegan Fiendish 11/15? It was horrible - far too obscure and inaccessible - probably one of the worst Sudokus of all time.
I was going to post a comment to that effect - but didn't want to appear negative.
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storm_norm



Joined: 18 Oct 2007
Posts: 1741
PostPosted: Mon Nov 17, 2008 9:26 pm    Post subject: Reply with quote
storm_norm wrote:
not to get side tracked...
did anyone see the vanhegan extreme yesterday? I think that was one of the hardest I have seen in a while.


ah! my mistake, I meant the vanhegan for monday the 17th.
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cgordon



Joined: 04 May 2007
Posts: 769
Location: ontario, canada
PostPosted: Mon Nov 17, 2008 10:23 pm    Post subject: Reply with quote
Yeah but the one for the 15th still sucked !
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Marty R.



Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA
PostPosted: Mon Nov 17, 2008 10:49 pm    Post subject: Reply with quote
storm_norm wrote:
storm_norm wrote:
not to get side tracked...
did anyone see the vanhegan extreme yesterday? I think that was one of the hardest I have seen in a while.


ah! my mistake, I meant the vanhegan for monday the 17th.

Norm, do you have the puzzle? I haven't been able to access the site, at least during the 5:00 EST hour.
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storm_norm



Joined: 18 Oct 2007
Posts: 1741
PostPosted: Mon Nov 17, 2008 11:23 pm    Post subject: Reply with quote
Quote:
Norm, do you have the puzzle? I haven't been able to access the site, at least during the 5:00 EST hour.


no. and I haven't been able to access his site either. the puzzle was diamond shaped. and the first advanced move I saw was a strange "hinge/grouped" coloring move on 5.
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tlanglet



Joined: 17 Oct 2007
Posts: 2468
Location: Northern California Foothills
PostPosted: Tue Nov 18, 2008 2:30 am    Post subject: Reply with quote
cgordon wrote:
Yeah but the one for the 15th still sucked !


The Vahegan for 11/15 was posted and many folks seemed to enjoy it. What was it that you did not like?

Ted
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nataraj



Joined: 03 Aug 2007
Posts: 1048
Location: near Vienna, Austria
PostPosted: Tue Nov 18, 2008 5:37 pm    Post subject: Reply with quote
storm_norm wrote:
Quote:
Norm, do you have the puzzle? I haven't been able to access the site, at least during the 5:00 EST hour.


no. and I haven't been able to access his site either. the puzzle was diamond shaped. and the first advanced move I saw was a strange "hinge/grouped" coloring move on 5.


The site can be accessed, and the puzzles displayed, it you choose the HTML option. It seems only the (default) Flash version has that problem (it says max. syndication or some such gibberish ...)

I've opened a thread over in the "Other" section
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