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Marty R.
Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA
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 Posted: Sat Dec 17, 2016 6:07 am Post subject: Dec. 17 VH |
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| Code: |
+------------+------------+-----------+
| 8 14 3 | 14 7 5 | 9 6 2 |
| 27 6 45 | 9 3 28 | 48 57 1 |
| 127 125 9 | 6 48 12 | 348 57 34 |
+------------+------------+-----------+
| 9 7 8 | 2 6 4 | 35 1 35 |
| 5 3 6 | 18 89 189 | 2 4 7 |
| 12 124 14 | 7 5 3 | 6 8 9 |
+------------+------------+-----------+
| 3 15 7 | 48 489 89 | 15 2 6 |
| 6 8 15 | 3 2 7 | 145 9 45 |
| 4 9 2 | 5 1 6 | 7 3 8 |
+------------+------------+-----------+
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Play this puzzle online at the Daily Sudoku site
| Quote: | | XY-Wing (45-1) pivot r2c3=> -1r8c2 |
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hughwill
Joined: 05 Apr 2010
Posts: 422
Location: Birmingham UK
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| Posted: Sat Dec 17, 2016 10:44 am Post subject: Dec 17 VH |
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There's a twin to Marty's XY pivoting on r1c2. The tasty looking
148 XY wing pivoted on r1c4 appears to fizzle out after a couple of
eliminations. But there is a a W-wing on 12 (strong link on 2s r2)
which removes the 1 from r3c1 and all fall.
Hugh |
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George Woods
Joined: 28 Mar 2006
Posts: 304
Location: Dorset UK
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| Posted: Sun Dec 18, 2016 5:03 pm Post subject: 2 wwing Solution |
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There is a ww wing on 89 operating 8s in col 2 which sets r5c5 to 9 and with a few more entries we get to the 12 wwing that Hughwill describes and that solves it.
Since WWings are not in the standard set of solutions there must be some other method of solving it? |
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Marty R.
Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA
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| Posted: Sun Dec 18, 2016 11:39 pm Post subject: |
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| George, I can see an 89 W-Wing connected by 8s in c4 but it doesn't eliminate anything in r5c5 (one of the 89 cells is there) |
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George Woods
Joined: 28 Mar 2006
Posts: 304
Location: Dorset UK
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| Posted: Mon Dec 19, 2016 9:36 am Post subject: wwing |
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| It eliminates the 9 in R5C6 and hence r5c5=9 |
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keith
Joined: 19 Sep 2005
Posts: 3355
Location: near Detroit, Michigan, USA
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| Posted: Mon Dec 19, 2016 3:41 pm Post subject: |
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| Code: | +-------------+-------------+-------------+
| 8 14 3 | 14 7 5 | 9 6 2 |
| 27 6 45 | 9 3 28 | 48 57 1 |
| 127 125 9 | 6 48 12 | 348 57 34 |
+-------------+-------------+-------------+
| 9 7 8 | 2 6 4 | 35 1 35 |
| 5 3 6 | 18 89 189 | 2 4 7 |
| 12 124 14 | 7 5 3 | 6 8 9 |
+-------------+-------------+-------------+
| 3 15 7 | 48 489 89 | 15 2 6 |
| 6 8 15 | 3 2 7 | 145 9 45 |
| 4 9 2 | 5 1 6 | 7 3 8 |
+-------------+-------------+-------------+
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There are three XY-wings in the puzzle:
14-5 in C23.
45-1 in C23.
14-8 in C45.
Keith |
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