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arkietech
Joined: 31 Jul 2008 Posts: 1834 Location: Northwest Arkansas USA
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Posted: Fri Sep 21, 2012 5:21 am Post subject: AU Tough September 20, 2012(VH) |
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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: 1110 Location: Dar es Salaam Tanzania
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Posted: Fri Sep 21, 2012 9:01 am Post subject: AU Tough September 20, 2012(VH) |
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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: 5770 Location: Rochester, NY, USA
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Posted: Fri Sep 21, 2012 4:59 pm Post subject: |
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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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