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roaa
Joined: 18 Apr 2009 Posts: 112 Location: Sweden
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Posted: Fri Sep 27, 2013 7:34 am Post subject: Sept 27 VH |
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Two very similar XY-wings (139) both solves it in one step. |
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hughwill
Joined: 05 Apr 2010 Posts: 424 Location: Birmingham UK
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Posted: Fri Sep 27, 2013 9:49 am Post subject: |
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After basics:
Code: |
+------------+-----------+---------+
| 2 147 139 | 19 6 8 | 47 5 39 |
| 79 147 8 | 5 13 2 | 47 6 39 |
| 5 6 39 | 79 37 4 | 8 2 1 |
+------------+-----------+---------+
| 16 8 2 | 167 17 9 | 5 3 4 |
| 4 5 16 | 16 8 3 | 9 7 2 |
| 3 9 7 | 2 4 5 | 6 1 8 |
+------------+-----------+---------+
| 8 2 4 | 3 5 7 | 1 9 6 |
| 79 17 169 | 8 2 16 | 3 4 5 |
| 16 3 5 | 4 9 16 | 2 8 7 |
+------------+-----------+---------+
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Play this puzzle online at the Daily Sudoku site
Roaa said:
Quote: | Two very similar XY-wings (139) both solves it in one step. |
....as does the less than elegant 47 UR which sets r8c2 to 7. |
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the_lock_man
Joined: 18 Dec 2012 Posts: 40 Location: Portsmarfff, UK
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Posted: Fri Sep 27, 2013 11:42 am Post subject: |
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W-Wing 39 boxes 1 & 3 sets R2C1<>9 |
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