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Nov 16 VH

 
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Clement



Joined: 24 Apr 2006
Posts: 1111
Location: Dar es Salaam Tanzania
PostPosted: Tue Nov 15, 2011 10:58 pm    Post subject: Nov 16 VH Reply with quote
I used two XY-Wings:-
XY-Wing 13 37 17 pivoted in r2c2; r5c1<>1 opens onother
XY-Wing 37 35 57 pivoted in r3c6; r4c3<>7 which solves it.
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Clement



Joined: 24 Apr 2006
Posts: 1111
Location: Dar es Salaam Tanzania
PostPosted: Thu Nov 17, 2011 12:15 pm    Post subject: Nov 16 VH Reply with quote
Another two step solution is the XYZ-Wing 347 with apex in r8c4; r79c4<>3 which opens a W-Wing on 37 with strong link 7 in row 6; r2c4<>3.
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tlanglet



Joined: 17 Oct 2007
Posts: 2468
Location: Northern California Foothills
PostPosted: Thu Nov 17, 2011 1:42 pm    Post subject: Reply with quote
Here is a one step solution based on a flightless xy-wing with a pseudocell pincer.

Flightless xy-wing (34-7) with pivot (34)r2c4, pincer (47)r2c9 and pseudocell pincer (37)r34c6.
Now transport the (7)r4c6: If r4c6=7 then, r4c3<>7, then r3c3=7; r2c2<>7

Ted
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