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Set K Puzzle 30

 
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daj95376



Joined: 23 Aug 2008
Posts: 3854
PostPosted: Wed Feb 25, 2009 5:03 pm    Post subject: Set K Puzzle 30 Reply with quote
Code:
 +-----------------------+
 | 4 . . | . . . | . . . |
 | . 9 . | 4 6 . | 2 . . |
 | . . 1 | 2 . 3 | 4 . . |
 |-------+-------+-------|
 | . 4 8 | 1 . 6 | 9 5 . |
 | . 3 . | . 2 . | 8 . 6 |
 | . . 6 | 9 . 8 | . . 4 |
 |-------+-------+-------|
 | . 6 9 | 3 4 . | 5 . . |
 | . . . | 6 . . | . 4 . |
 | . . . | . 7 1 | . . . |
 +-----------------------+

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storm_norm



Joined: 18 Oct 2007
Posts: 1741
PostPosted: Wed Feb 25, 2009 6:02 pm    Post subject: Reply with quote
Code:
.---------------------.---------------------.---------------------.
| 4      2578   237   | 58     1      579   | 367    36789  35789 |
| 358    9      37    | 4      6      57    | 2      378    1     |
| 6      578    1     | 2      89     3     | 4      789    5789  |
:---------------------+---------------------+---------------------:
| 27     4      8     | 1      3      6     | 9      5      27    |
| 9      3      5     | 7      2      4     | 8      1      6     |
| 27     1      6     | 9      5      8     | 37     237    4     |
:---------------------+---------------------+---------------------:
| 1      6      9     | 3      4      2     | 5      78     78    |
| 358    2578   237   | 6      89     59    | 1      4      23    |
| 358    258    4     | 58     7      1     | 36     2369   239   |
'---------------------'---------------------'---------------------'

xy-wing {2,3,7}
couple singles leaves r1c7 as {3,7}... start with that cell
(3=7)r1c7 - (7)r1c6 = (7-5)r2c6 = (5-8)r2c1 = (8)r2c8; r2c8 <> 3
singles follow
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tlanglet



Joined: 17 Oct 2007
Posts: 2468
Location: Northern California Foothills
PostPosted: Thu Feb 26, 2009 8:31 pm    Post subject: Reply with quote
Two steps:
Quote:
A xy-wing<237> with pivot <27> in r4c9, followed by a w-wing<37> with strong link <7> in col <6>.

Ted
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Marty R.



Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA
PostPosted: Mon Mar 02, 2009 5:33 am    Post subject: Reply with quote
I was so focused on the three 27 pairs that I overlooked the simple XY-Wing and instead used the XY-Wing Chain of 23-27-27-27-37. Then the W-Wing on 37 and an XY-Wing on 578.
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