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June 9 VH

 
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Earl



Joined: 30 May 2007
Posts: 677
Location: Victoria, KS

PostPosted: Tue Jun 09, 2009 2:04 am    Post subject: June 9 VH Reply with quote

The old reliable does it again; or a very apparent uniqueness test.

Solutions: xy wing (678); or UR (18)


Early Earl


Last edited by Earl on Tue Jun 09, 2009 2:14 pm; edited 1 time in total
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sdq_pete



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

PostPosted: Tue Jun 09, 2009 10:07 am    Post subject: Reply with quote

The UR arose about half-way through filling in the basics, so something of a non-issue.

Peter
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crunched



Joined: 05 Feb 2008
Posts: 168

PostPosted: Tue Jun 09, 2009 12:17 pm    Post subject: Reply with quote

Here is my grid after basics:
I saw the UR which solved it. I did not see the xy wing - 678 - reported by Earl.
But Voila! It is indeed there! 67 is the tether, and the other two are the wings.


Code:

+---------------+--------+--------------+
| 37   2   36   | 8 5  9 | 67   1   4   |
| 1    8   4    | 7 6  2 | 9    5   3   |
| 5    67  9    | 4 3  1 | 2678 268 78  |
+---------------+--------+--------------+
| 38   13  138  | 9 4  6 | 5    7   2   |
| 29   69  26   | 5 18 7 | 4    3   18  |
| 4    5   7    | 2 18 3 | 68   689 189 |
+---------------+--------+--------------+
| 2378 37  2358 | 6 9  4 | 1    28  578 |
| 2789 4   28   | 1 27 5 | 3    289 6   |
| 6    179 125  | 3 27 8 | 27   4   579 |
+---------------+--------+--------------+

Play this puzzle online at the Daily Sudoku site
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wapati



Joined: 10 Jun 2008
Posts: 472
Location: Brampton, Ontario, Canada.

PostPosted: Tue Jun 09, 2009 2:32 pm    Post subject: Reply with quote

sdq_pete wrote:
The UR arose about half-way through filling in the basics, so something of a non-issue.
Peter


I don't agree, perhaps.

I spot some URs and some x-wings as I am still filling in candidates.
This frequently lets me reduce candidate possibles in cells I have not yet filled in, and that helps expose xy-wings and such.
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cgordon



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

PostPosted: Tue Jun 09, 2009 4:52 pm    Post subject: Reply with quote

Painfully easy!
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Wendy W



Joined: 04 Feb 2008
Posts: 144

PostPosted: Wed Jun 10, 2009 12:08 am    Post subject: Reply with quote

Yeah, way too easy. Stuck out like a sore thumb.
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cgordon



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

PostPosted: Wed Jun 10, 2009 2:58 pm    Post subject: Reply with quote

For a Goldilocks Puzzle I would recommend “Todays BB” posted by Keith on June 9 in Other Puzzles. Not too soft like this VH – and not too hard like some of those puzzles that require a Kraken advanced fish solution with Sashmi transports. Just lots of wings, URs, ERs and colouring. Just right.
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swando



Joined: 09 Mar 2009
Posts: 17
Location: Surrey, BC. Canada

PostPosted: Sat Jun 20, 2009 6:56 am    Post subject: Reply with quote

I never swayed from the basics and this one fell apart..as i had not done this one I used the auto sweep and it was like an easy rated one imo
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