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Sep 22 VH

 
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Clement



Joined: 24 Apr 2006
Posts: 1111
Location: Dar es Salaam Tanzania
PostPosted: Wed Sep 21, 2011 10:37 pm    Post subject: Sep 22 VH Reply with quote
XY-Wing (23) (39) (29) pivoted in r9c9 or r7c7 solves it by setting r2c7<>2 or r1c9<>9 respectively.
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