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Puzzle 10/10/29: C XY

 
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daj95376



Joined: 23 Aug 2008
Posts: 3854

PostPosted: Fri Oct 29, 2010 12:30 am    Post subject: Puzzle 10/10/29: C XY Reply with quote

Code:
 +-----------------------+
 | . . 6 | 4 . . | . . 3 |
 | . 5 . | . . . | 1 8 . |
 | 7 . 2 | 8 . 1 | 4 . 6 |
 |-------+-------+-------|
 | 3 . 1 | . . . | . 4 . |
 | . . . | . 1 3 | 8 6 . |
 | . . 8 | . 4 . | . . . |
 |-------+-------+-------|
 | . 8 3 | . 6 . | 2 7 4 |
 | . 7 . | 3 8 . | 9 1 . |
 | 2 . 5 | . . . | 6 . . |
 +-----------------------+

Play this puzzle online at the Daily Sudoku site
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storm_norm



Joined: 18 Oct 2007
Posts: 1741

PostPosted: Fri Oct 29, 2010 6:17 am    Post subject: Reply with quote



the above image shows a AUR on candidates {5,9} in r567c146

(2)r2c9 = (2)r2c4 - AUR59[(2)r5c4 = (67)r26c6] - (7)r1c6 = (7)r1c7; r2c9 <> 7
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peterj



Joined: 26 Mar 2010
Posts: 974
Location: London, UK

PostPosted: Fri Oct 29, 2010 7:56 am    Post subject: Reply with quote

After the "B" puzzle I was in ALS mode, here's a neat HP move...
Quote:
hp(67)r26c4=(6)r4c4 - (6=2)r4c2 - (2)r4c5=r1c5 ; r2c4<>2

You could interpret it as an s-wing(26) where the (6)sl is created by the HP...
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Marty R.



Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA

PostPosted: Sat Oct 30, 2010 7:22 pm    Post subject: Reply with quote

Nice move Norm. I wish I could do better at spotting those things.
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tlanglet



Joined: 17 Oct 2007
Posts: 2468
Location: Northern California Foothills

PostPosted: Mon Nov 08, 2010 2:41 pm    Post subject: Reply with quote

A fun rambling solution.........

AUR(59)r13c58 external SIS r4c5=5,r6c8=5,r4c5=9; r3c8<>5
(5)r4c5-r4c7=(5)r1c7;
||
(5)r6c8;
||
(9)r1c6-(9=5)r3c5;

AUR(67)r26c46 external SIS r6c2=6,r2c9=7; r6c6<>6
AUR(67)[(6)r6c2=(7)r2c9]-(7=6)r2c5;

(2=9)r1c5-(9=2)r4c5-(2=6)r4c2-(6=2)r6c2-(2=5)r6c8-(5=7)r4c7-(7=5)r1c7-(5-2)r1c8..loop; r4c49<>2,r6c4<>2

xy-wing 2-59 vertex (29)r5c9; r6c1<>5

BUG+1; r6c4=5

Ted
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