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20 July VH

 
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Captain Pete



Joined: 09 Jun 2007
Posts: 55
Location: Oley, PA
PostPosted: Fri Jul 20, 2007 2:20 pm    Post subject: 20 July VH Reply with quote
Johan found an XY-Chain to solve this puzzle. Are there alternate techniques to solve it?
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Asellus



Joined: 05 Jun 2007
Posts: 865
Location: Sonoma County, CA, USA
PostPosted: Fri Jul 20, 2007 9:00 pm    Post subject: Reply with quote
Three steps:

XYZ-Wing, pivot R2C2 eliminates a <1> in R1

X-Wing on 6

XYZ-Wing, pivot R2C6 eliminates a <9> in R2

But, seems it was a day for XY-Chains.
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Marty R.



Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA
PostPosted: Fri Jul 20, 2007 9:55 pm    Post subject: Re: 20 July VH Reply with quote
Captain Pete wrote:
Johan found an XY-Chain to solve this puzzle. Are there alternate techniques to solve it?

Two XYZ-Wings did it for me, probably the same two that Asellus mentioned.
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