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AU Tough September 20, 2012(VH)

 
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arkietech



Joined: 31 Jul 2008
Posts: 1719
Location: Northwest Arkansas USA

PostPosted: Fri Sep 21, 2012 5:21 am    Post subject: AU Tough September 20, 2012(VH) Reply with quote

Code:

 *-----------*
 |..4|..2|...|
 |...|..8|9.7|
 |3..|.7.|.8.|
 |---+---+---|
 |6..|..1|...|
 |.7.|...|.2.|
 |...|5..|..1|
 |---+---+---|
 |.3.|.9.|..4|
 |2.8|6..|...|
 |...|3..|6..|
 *-----------*
 

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Clement



Joined: 24 Apr 2006
Posts: 668
Location: Dar es Salaam Tanzania

PostPosted: Fri Sep 21, 2012 9:01 am    Post subject: AU Tough September 20, 2012(VH) Reply with quote

Code after Basics
Code:

+----------+-----------+------------+
| 7  8   4 | 9 5   2   | 1  #36   #36 |
| 5  6   2 | 1 3   8   | 9  4    7  |
| 3  1   9 | 4 7   6   | 2  8    5  |
+----------+-----------+------------+
| 6  249 5 | 7 24  1   | 34 *39   8  |
| 49 7   1 | 8 46  3   | 5  2    69 |
| 8  24  3 | 5 246 9   | 47 67   1  |
+----------+-----------+------------+
| 1  3   6 | 2 9   57  | 8  57   4  |
| 2  459 8 | 6 1   457 | 37 357-9 *39 |
| 49 459 7 | 3 8   45  | 6  1    2  |
+----------+-----------+------------+
W-Wing 39 in BOX 69 with SL 3 in row 1; r8c8<>9 solves it.
OR a two-step solution Hidden UR 57 in row 78; r8c6<>7 which opens a
Type 1 UR 45 in col 26; r9c2<>45.
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Marty R.



Joined: 12 Feb 2006
Posts: 5160
Location: Rochester, NY, USA

PostPosted: Fri Sep 21, 2012 4:59 pm    Post subject: Reply with quote

Code:
+-------------+-------------+--------------+
|  7    8   4 | 9  5    2   |  1  36    36 |
|  5    6   2 | 1  3    8   |  9  4     7  |
|  3    1   9 | 4  7    6   |  2  8     5  |
+-------------+-------------+--------------+
|  6    249 5 | 7  24   1   |  34 39    8  |
| F49   7   1 | 8 E46   3   |  5  2    D69 |
|  8    24  3 | 5  246  9   |  47 67    1  |
+-------------+-------------+--------------+
|  1    3   6 | 2  9    57  |  8  57    4  |
|  2    45  8 | 6  1   A457 | B37 3579 C39 |
|  4-9 G459 7 | 3  8    45  |  6  1     2  |
+-------------+-------------+--------------+


I love to monkey around with pincers on a DP. With the potential DP 45 in boxes 78, A=7 or G=9. A=7-->F=9 via ABCDEF; r9c1<>9.

Alternatively, XY-Wing 396 pivoted in r4c8.
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