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Puzzle 11/04/02: ~ Difficult

 
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daj95376



Joined: 23 Aug 2008
Posts: 3854
PostPosted: Sat Apr 02, 2011 9:17 pm    Post subject: Puzzle 11/04/02: ~ Difficult Reply with quote
Code:
 +-----------------------+
 | . . . | . . . | . . . |
 | . 1 . | . . 8 | 9 . . |
 | . . 5 | 1 9 . | 8 . 3 |
 |-------+-------+-------|
 | . . 6 | 8 5 . | 4 1 . |
 | . . 7 | 6 . . | 5 3 9 |
 | . 5 . | . . 9 | 6 . . |
 |-------+-------+-------|
 | . 4 3 | 9 6 2 | 7 . . |
 | . . . | 4 8 . | . 5 . |
 | . . 8 | . 3 . | . . . |
 +-----------------------+

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peterj



Joined: 26 Mar 2010
Posts: 974
Location: London, UK
PostPosted: Sun Apr 03, 2011 2:53 pm    Post subject: Reply with quote
Two steps - second is not quite an honest xy-chain..
Quote:
xyz-wing(23-7) r6c4 ; r6c5<>7
xy-chain-ish ; (4=2)r3c8 - (2=7)r6c8 - r4c9=r4c6 - (7=1)r8c6 - (1=2)r8c3 - (2=4)r2c3 ; r2c8<>4, r1c3<>4
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Marty R.



Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA
PostPosted: Mon Apr 04, 2011 10:42 pm    Post subject: Reply with quote
I used an XYZ-Wing on 127 and the potential DP on 25 in boxes 23. The four cells with common outcomes were enough to complete.
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