au tough October 30, 2012

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au tough October 30, 2012

Postby ArkieTech » Tue Oct 30, 2012 8:20 am

Code: Select all
 *-----------*
 |...|.5.|..2|
 |..9|.41|...|
 |.81|...|5..|
 |---+---+---|
 |2..|...|.57|
 |...|.2.|...|
 |41.|...|..3|
 |---+---+---|
 |..3|...|69.|
 |...|86.|4..|
 |6..|.3.|...|
 *-----------*


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Re: au tough October 30, 2012

Postby tlanglet » Tue Oct 30, 2012 1:37 pm

Code after basics:
Code: Select all
*--------------------------------------------------------------------*
 | 7      46     46     | 39     5      8      | 39     1      2      |
 | 5      2      9      | 37     4      1      | 378    78     6      |
 | 3      8      1      | 26     79     26     | 5      47     49     |
 |----------------------+----------------------+----------------------|
 | 2      369    68     | 1469   189    3469   | 189    5      7      |
 | 89     3569   5678   | 15679  2      35679  | 189    468    49     |
 | 4      1      5678   | 5679   789    5679   | 289    268    3      |
 |----------------------+----------------------+----------------------|
 | 18     457    3      | 12457  17     2457   | 6      9      158    |
 | 19     579    2      | 8      6      579    | 4      3      15     |
 | 6      459    458    | 1459   3      459    | 27     27     158    |
 *--------------------------------------------------------------------*

m-wings seem to be the key to the au tough puzzles...

(1=8)r7c1-r7c9=(8-1)r9c9=1r9c4 => r7c45<>1
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Re: au tough October 30, 2012

Postby ArkieTech » Tue Oct 30, 2012 1:41 pm

:D No ringers this time. :D
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Re: au tough October 30, 2012

Postby tlanglet » Tue Oct 30, 2012 2:44 pm

Another short solution is an ANP(18=5)r7c19-(5=1)r8c9-r8c1=(1)r7c1 => r7c45<>1
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Re: au tough October 30, 2012

Postby Marty R. » Tue Oct 30, 2012 6:44 pm

Also the 18 M-Wing.
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