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Puzzle 11/07/06: ~ XY

 
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daj95376



Joined: 23 Aug 2008
Posts: 3855

PostPosted: Wed Jul 06, 2011 4:51 pm    Post subject: Puzzle 11/07/06: ~ XY Reply with quote

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

Play this puzzle online at the Daily Sudoku site
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tlanglet



Joined: 17 Oct 2007
Posts: 2461
Location: Northern California Foothills

PostPosted: Wed Jul 06, 2011 9:29 pm    Post subject: Reply with quote

A quick step...........

Quote:
w-wing (16)r8c1|r9c8 GSL(6)r2c168; r8c79<>1

Ted
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Marty R.



Joined: 12 Feb 2006
Posts: 5162
Location: Rochester, NY, USA

PostPosted: Thu Jul 07, 2011 5:03 am    Post subject: Reply with quote

Nice find Ted. I was looking and missed it.

I played a couple of X-Wings on 1, an apparently worthless Type 4 UR on 24 and an AIC; r2c6<>6.
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daj95376



Joined: 23 Aug 2008
Posts: 3855

PostPosted: Thu Jul 07, 2011 6:00 am    Post subject: Reply with quote

Code:
 after basics and w/Ted's cells marked
 +-----------------------------------------------------------------------+
 |  8      4      36     |  136    5      9      |  7      136    2      |
 | #36     1      5      |  2      7     @46     |  9     #3468   48     |
 |  9      2      7      |  136    8      146    |  146    1346   5      |
 |-----------------------+-----------------------+-----------------------|
 |  13     6      138    |  7      9      2      |  148    5      148    |
 |  7      5      2      |  4      1      8      |  3      9      6      |
 |  4      9      18     |  5      6      3      |  18     2      7      |
 |-----------------------+-----------------------+-----------------------|
 |  5      7      169    |  89     24     16     |  12468  1468   3      |
 | *16     3      169    |  89     24     5      |  12468  7      148    |
 |  2      8      4      |  16     3      7      |  5     *16     9      |
 +-----------------------------------------------------------------------+
 # 54 eliminations remain

Ted, do you mean an almost W-Wing?
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tlanglet



Joined: 17 Oct 2007
Posts: 2461
Location: Northern California Foothills

PostPosted: Thu Jul 07, 2011 12:17 pm    Post subject: Reply with quote

Danny,

I did not think of the pattern as an almost w-wing, but it definitely could be viewed that way. My POV was simply a group of (6s) which, in this case, could also be considered as a Kraken Row: (6)r2.

Terminology is $#*&^.............

Ted
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susume



Joined: 13 May 2011
Posts: 36
Location: Southeastern US

PostPosted: Thu Jul 14, 2011 1:40 pm    Post subject: Reply with quote

I still need some help seeing this. I see the W wing if r2c6<>6, but not how the alternative of r2c6=6 leads to eliminations in r8 - seems to me it targets row 7 instead. Can someone please clarify?

Thanks
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tlanglet



Joined: 17 Oct 2007
Posts: 2461
Location: Northern California Foothills

PostPosted: Thu Jul 14, 2011 2:09 pm    Post subject: Reply with quote

susume wrote:
I still need some help seeing this. I see the W wing if r2c6<>6, but not how the alternative of r2c6=6 leads to eliminations in r8 - seems to me it targets row 7 instead. Can someone please clarify?

Thanks


Susme,

How about: (6)r2c6-r13c4=r9c4-(6=1)r9c8

Sometimes the obvious to the hardest to see...... Wink

Ted
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daj95376



Joined: 23 Aug 2008
Posts: 3855

PostPosted: Thu Jul 14, 2011 2:15 pm    Post subject: Reply with quote

susume wrote:
I still need some help seeing this. I see the W wing if r2c6<>6, but not how the alternative of r2c6=6 leads to eliminations in r8 - seems to me it targets row 7 instead. Can someone please clarify?

You need to proceed past r7c6 in your logic:

Code:
(6)r2c6 - r7c6 = r9c4 - (6=1)r9c8  =>  r8c79<>1

Regards, Danny
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susume



Joined: 13 May 2011
Posts: 36
Location: Southeastern US

PostPosted: Thu Jul 14, 2011 7:48 pm    Post subject: Reply with quote

Lol my eye was stuck on that one cell and I couldn't see beyond it! Thanks, gentlemen.
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