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April 19 VH

 
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Clement



Joined: 24 Apr 2006
Posts: 1110
Location: Dar es Salaam Tanzania

PostPosted: Tue Apr 19, 2011 12:30 am    Post subject: April 19 VH Reply with quote

XY-Wing 69 67 79 pivot in r7c7 setting r8c1<>9 solves it.
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mackem



Joined: 09 Apr 2011
Posts: 5
Location: Thailand

PostPosted: Tue Apr 19, 2011 5:45 am    Post subject: Reply with quote

Thanx again. Hopefully I'll get the hang of it one day. Idea
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George Woods



Joined: 28 Mar 2006
Posts: 304
Location: Dorset UK

PostPosted: Tue Apr 19, 2011 12:33 pm    Post subject: another couple of solutions Reply with quote

the W-wing 46 in boxes 1 and 9 acting on 6 in col7 deny a 4 to r9c3.

Exactly the same result can be achieved via an ER? The 4s in Box 1 and the strong linked 4s in col 9 forbid a 4 at r9c3 (else there is no room for a 4 in box 1
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roaa



Joined: 18 Apr 2009
Posts: 112
Location: Sweden

PostPosted: Tue Apr 19, 2011 1:27 pm    Post subject: Reply with quote

I used the xy-wing 467, also with pivot at r7c7.
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cgordon



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

PostPosted: Tue Apr 19, 2011 2:31 pm    Post subject: Reply with quote

I also used an ER using the 4s in Box 3 and the two 4s in C3 to eliminate the 4 in R9C9.
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Marty R.



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

PostPosted: Tue Apr 19, 2011 3:51 pm    Post subject: Reply with quote

I'll throw in a Skyscraper on 4 in columns 39.
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