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Puzzle 11/04/14: ~ Difficult+ (BBDB?)

 
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daj95376



Joined: 23 Aug 2008
Posts: 3854
PostPosted: Thu Apr 14, 2011 4:57 pm    Post subject: Puzzle 11/04/14: ~ Difficult+ (BBDB?) Reply with quote
Code:
 +-----------------------+
 | 7 . 8 | . . . | 2 . . |
 | . . . | 9 . . | . . . |
 | 6 . 1 | . 2 . | 3 9 . |
 |-------+-------+-------|
 | . 2 . | 6 4 . | 7 . . |
 | . . 3 | 8 5 . | 9 6 . |
 | . . . | . . 9 | 8 . 1 |
 |-------+-------+-------|
 | 3 . 7 | 4 9 5 | . . . |
 | . . 2 | . 8 . | . 3 . |
 | . . . | . . 3 | . . . |
 +-----------------------+

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peterj



Joined: 26 Mar 2010
Posts: 974
Location: London, UK
PostPosted: Fri Apr 15, 2011 7:23 am    Post subject: Reply with quote
Nice puzzle - three steps
Quote:
m-wing-like(45) ; (5=64)r1c96 - (4)r4c6=(4-5)r3c2=r2c3 ; r2c79<>5
xy-chain ; (1=4)r1c8 - (4=6)r1c6 - (6=7)r8c6 - (7=1)r7c4 ; r1c4<>1
xy-wing(56-4) r8c2 ; r8c1<>4, r9c78<>4
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Marty R.



Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA
PostPosted: Sat Apr 16, 2011 5:29 pm    Post subject: Reply with quote
I had a lot of trouble with this. XY-Chain and XYZ-Wing that didn't seem to do much. But a Medusa trap opened up things enough to finish with a couple of W-Wings.
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