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Puzzle 11/05/13: ~ XY

 
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daj95376



Joined: 23 Aug 2008
Posts: 3854
PostPosted: Fri May 13, 2011 9:14 pm    Post subject: Puzzle 11/05/13: ~ XY Reply with quote
Code:
 +-----------------------+
 | . 4 9 | 8 . . | 6 7 . |
 | 7 . . | . 6 4 | . . . |
 | 3 . 8 | . . . | 4 . 2 |
 |-------+-------+-------|
 | 6 . . | 7 . . | . . . |
 | . 9 . | . 4 . | . . . |
 | . 5 . | . . 6 | 8 9 . |
 |-------+-------+-------|
 | 5 . 4 | . . 9 | 2 . 6 |
 | 2 . . | . . 7 | . . . |
 | . . 6 | . . . | 7 . . |
 +-----------------------+

Play this puzzle online at the Daily Sudoku site
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peterj



Joined: 26 Mar 2010
Posts: 974
Location: London, UK
PostPosted: Sat May 14, 2011 7:57 am    Post subject: Reply with quote
A w-wing-like chain with als...
Quote:
ant(389=1)r2c789 - r3c8=r3c6 - r5c6=r6c5 - (1=3)r6c9 ; r1c9<>3
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daj95376



Joined: 23 Aug 2008
Posts: 3854
PostPosted: Sat May 14, 2011 2:31 pm    Post subject: Reply with quote
Interesting find Peter !
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tlanglet



Joined: 17 Oct 2007
Posts: 2468
Location: Northern California Foothills
PostPosted: Sun May 15, 2011 2:38 pm    Post subject: Reply with quote
I could not resist looking at all the (13)s; it was impossible since that was by far the majority of the bivalue cells.

Flightless w-wing (13) r6c9|r7c4 with grouped strong link(1)r6789c5; r7c4=3
Transport: (3)r6c9-r12c9=r2c78-r2c4=(3)r7c4

Ted
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tlanglet



Joined: 17 Oct 2007
Posts: 2468
Location: Northern California Foothills
PostPosted: Sun May 15, 2011 2:48 pm    Post subject: Reply with quote
peterj wrote:
A w-wing-like chain with als...
Quote:
ant(389=1)r2c789 - r3c8=r3c6 - r5c6=r6c5 - (1=3)r6c9 ; r1c9<>3


Very nice find Peter Exclamation

I studying your solution, I realized that an ant(189=3) perspective also works.

Ted
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Marty R.



Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA
PostPosted: Sun May 15, 2011 9:53 pm    Post subject: Reply with quote
I used a flightless XY-Wing (351) and X-Wing (3).
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