au tough October 27, 2012

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au tough October 27, 2012

Postby ArkieTech » Sat Oct 27, 2012 6:40 am

Code: Select all
 *-----------*
 |..6|2..|...|
 |5.3|8..|.9.|
 |...|...|4..|
 |---+---+---|
 |3..|.2.|.1.|
 |.1.|...|.3.|
 |.9.|.6.|..8|
 |---+---+---|
 |..9|...|...|
 |.4.|..6|7.5|
 |...|..7|9..|
 *-----------*


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Re: au tough October 27, 2012

Postby Leren » Sat Oct 27, 2012 10:57 am

HUR 49 r45c49 => -9r5c4, XY Chain 1-r1c5-9-r8c5-3-r3c5-5-r3c6-3-r6c6-1 => -1r1c6.
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Re: au tough October 27, 2012

Postby ArkieTech » Sat Oct 27, 2012 11:38 am

Code: Select all
 *--------------------------------------------------*
 | 4    7    6    | 2   c19   19   | 8    5    3    |
 | 5    2    3    | 8    7    4    | 1    9    6    |
 | 9    8    1    | 6    35   35   | 4    2    7    |
 |----------------+----------------+----------------|
 | 3    5    78   | 479  2    89   | 6    1    49   |
 | 6    1    78   | 479  459  589  | 2    3    49   |
 | 2    9    4    |a13   6    13   | 5    7    8    |
 |----------------+----------------+----------------|
 | 7    6    9    | 5    8    2    | 3    4    1    |
 | 1    4    2    | 9-3 c39   6    | 7    8    5    |
 | 8    3    5    |b14  c14   7    | 9    6    2    |
 *--------------------------------------------------*
als xy-wing
(3=1)r6c4-(1=4)r9c4-(1r9c5=3r8c5)r189c5 => -3r8c4; stte


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Re: au tough October 27, 2012

Postby tlanglet » Sat Oct 27, 2012 11:57 am

I usually get into trouble with moves like this but I continue to try.
Almost MUG(4789)r45c3469 External SIS 4r5c5 & 9r5c5 => -5r5c5

Or an AUR(49)r45c49 External SIS 4r5c5 & 9r5c5 => -5r5c5 works

[Edited to correct deletion as noted by Dan below]
Last edited by tlanglet on Sat Oct 27, 2012 2:36 pm, edited 1 time in total.
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Re: au tough October 27, 2012

Postby ArkieTech » Sat Oct 27, 2012 1:20 pm

tlanglet wrote:I usually get into trouble with moves like this but I continue to try.
Almost MUG(4789)r45c3469 External SIS 4r5c5 & 9r5c5 => 5r5c5

Or an AUR(49)r45c49 External SIS 4r5c5 & 9r5c5 => 5r5c5 works


Shouldn't it be -5r5c5 to break the dp :?:

Very nice :D
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Re: au tough October 27, 2012

Postby tlanglet » Sat Oct 27, 2012 1:42 pm

Dan,

I am looking at the external inferences to prevent the DP. That is, at least one occurrence of digit 4, 7, 8 or 9
that shares a house with the potential DP must be true. The external digits that I used were 4r5c5 and 9r5c5; no external digits for 7 & 8 exist. If r5c5 must be a 4 or a 9, it will never equal 5.
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Re: au tough October 27, 2012

Postby ArkieTech » Sat Oct 27, 2012 1:59 pm

tlanglet wrote:I am looking at the external inferences to prevent the DP. That is, at least one occurrence of digit 4, 7, 8 or 9
that shares a house with the potential DP must be true. The external digits that I used were 4r5c5 and 9r5c5; no external digits for 7 & 8 exist. If r5c5 must be a 4 or a 9, it will never equal 5.


[(4=9)r5c5]dp:r45c3469 => -5r5c5; stte
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Re: au tough October 27, 2012

Postby tlanglet » Sat Oct 27, 2012 2:42 pm

I am going to change my method of stating "not equal to" from "-" to "<>" . The "-" character is so small with the font used on this site that it is hard to see. I glanced at my original post based on the input by Dan and thought it included the "-", but I just now realized it was missing.

Sorry all for my blurry eyes that missed read my own post.
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Re: au tough October 27, 2012

Postby Marty R. » Sat Oct 27, 2012 5:21 pm

My rather inelegant solution is r5c5<>4. A 4 in that cell leads to an invalidity when doing an external analysis.
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Re: au tough October 27, 2012

Postby eleven » Sat Oct 27, 2012 7:31 pm

tlanglet wrote:Almost MUG(4789)r45c3469 External SIS 4r5c5 & 9r5c5 => -5r5c5

Or an AUR(49)r45c49 External SIS 4r5c5 & 9r5c5 => -5r5c5 works

I agree with the first move, it's a nice DP and r5c6 must be 5 (or externally r5c5 must be 4 or 9)
Code: Select all
 |----------------+----------------+----------------|
 | 3    5   #78   |#479  2   #89   | 6    1   #49   |
 | 6    1   #78   |#479  459 #89+5 | 2    3   #49   |
 | 2    9    4    | 13   6    13   | 5    7    8    |
 |----------------+----------------+----------------|

But not the second, from the 49 DP also r56c6 could be 9.
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Re: au tough October 27, 2012

Postby tlanglet » Sat Oct 27, 2012 8:20 pm

eleven wrote:
tlanglet wrote:Almost MUG(4789)r45c3469 External SIS 4r5c5 & 9r5c5 => -5r5c5

Or an AUR(49)r45c49 External SIS 4r5c5 & 9r5c5 => -5r5c5 works

I agree with the first move, it's a nice DP and r5c6 must be 5 (or externally r5c5 must be 4 or 9)
Code: Select all
 |----------------+----------------+----------------|
 | 3    5   #78   |#479  2   #89   | 6    1   #49   |
 | 6    1   #78   |#479  459 #89+5 | 2    3   #49   |
 | 2    9    4    | 13   6    13   | 5    7    8    |
 |----------------+----------------+----------------|

But not the second, from the 49 DP also r56c6 could be 9.


Eleven, Thanks for pointing out my mistake. I was more concern/interested in the MUG and, after the fact, included the AUR(49) remembering that the external inferences for the MUG but forgetting the 9s in r45c6. Here is my first :oops: on this forum, with many more to come.
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