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VH 8 Sept 08

 
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sdq_pete



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

PostPosted: Mon Sep 08, 2008 9:30 am    Post subject: VH 8 Sept 08 Reply with quote

Quicky - couldn't find an X, but a W-wing did it. Curious what others found.

Peter
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andras



Joined: 31 Oct 2007
Posts: 56
Location: Mid Wales

PostPosted: Mon Sep 08, 2008 9:35 am    Post subject: Reply with quote

My wife found an xy, but I solved it with no advanced techniques as all. In fact I told her that it must have been a mistake to classify it as a VH when it should have been marked Easy.

John
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arkietech



Joined: 31 Jul 2008
Posts: 1834
Location: Northwest Arkansas USA

PostPosted: Mon Sep 08, 2008 11:40 am    Post subject: Re: VH 8 Sept 08 Reply with quote

sdq_pete wrote:
Curious what others found.

Peter


Code:
 *-----------*
 |...|79.|.43|
 |...|...|.15|
 |...|.23|...|
 |---+---+---|
 |..1|65.|.9.|
 |..8|4.9|7..|
 |.5.|.72|6..|
 |---+---+---|
 |...|21.|...|
 |34.|...|...|
 |61.|.87|...|
 *-----------*


I needed an xy-wing
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tlanglet



Joined: 17 Oct 2007
Posts: 2468
Location: Northern California Foothills

PostPosted: Mon Sep 08, 2008 12:45 pm    Post subject: Reply with quote

I also used a xy-wing with the pivot in b4.

This was another easy, one-stepper. It would be nice if the VH puzzles were more involved.

Ted
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cgordon



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

PostPosted: Mon Sep 08, 2008 1:21 pm    Post subject: Reply with quote

Fast going up to the <379> xy wing - which took me a while to locate, because I'm xy-wing challenged. Don't believe it can be done without a VH step.

Last edited by cgordon on Mon Sep 08, 2008 2:41 pm; edited 1 time in total
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sdq_pete



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

PostPosted: Mon Sep 08, 2008 2:28 pm    Post subject: Reply with quote

Just to clarify, then:
Code:

+-------------+-------+----------+
| 5  28   6   | 7 9 1 | 28 4  3  |
| 79 2379 379 | 8 4 6 | 29 1  5  |
| 1  89   4   | 5 2 3 | 89 67 67 |
+-------------+-------+----------+
| 47 37   1   | 6 5 8 | 34 9  2  |
| 2  6    8   | 4 3 9 | 7  5  1  |
| 49 5    39  | 1 7 2 | 6  38 48 |
+-------------+-------+----------+
| 8  79   579 | 2 1 4 | 35 36 69 |
| 3  4    2   | 9 6 5 | 1  78 78 |
| 6  1    59  | 3 8 7 | 45 2  49 |
+-------------+-------+----------+

Play this puzzle online

The XY indeed should have been pretty clear. The W-wing was based on the 79's in Blocks 1 and 7 and the 7's in Block 4.

Peter
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Marty R.



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

PostPosted: Mon Sep 08, 2008 3:44 pm    Post subject: Reply with quote

I was playing around to see how many different moves I could find. The 79 W-Wing didn't get me very far, but the M-Wing on 49 in boxes 49 made it a one-stepper.

Also, to preclude the DP 28-29-89 in rows 123, columns 27, r2c2 must be 3 or 7. One of them led to an invalid solution and the other one solved the puzzle, but with less elegance.
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Wendy W



Joined: 04 Feb 2008
Posts: 144

PostPosted: Mon Sep 08, 2008 11:34 pm    Post subject: Reply with quote

I kind of figured it would be pretty easy when I filled in boxes 2, 5, and 8 immediately!
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