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Earl
Joined: 30 May 2007
Posts: 677
Location: Victoria, KS
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 Posted: Sat Feb 25, 2017 6:45 am Post subject: Feb 25 VH |
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23 9 5 | 17 37 4 | 6 18 128 |
| 23 6 4 | 8 5 13 | 12 7 9 |
| 8 1 7 | 9 6 2 | 5 3 4 |
+----------+-----------+-----------+
| 6 4 9 | 3 8 7 | 12 5 12 |
| 5 8 1 | 2 4 6 | 7 9 3 |
| 7 3 2 | 5 1 9 | 8 4 6 |
+----------+-----------+-----------+
| 9 25 38 | 6 23 135 | 4 18 7 |
| 4 57 6 | 17 9 8 | 3 2 15 |
| 1 27 38 | 4 27 35 | 9 6 58 |
+----------+-----------+-----------+
235 xy wing @ R7C5, -5R7C6
also: skyscraper of strong pairs of 1 in C4,8; -1R8C9
Early Earl |
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hughwill
Joined: 05 Apr 2010
Posts: 424
Location: Birmingham UK
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| Posted: Sat Feb 25, 2017 11:23 am Post subject: Re: Feb 25 VH |
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| Earl wrote: |
also: skyscraper of strong pairs of 1 in C4,8; -1R8C9
Early Earl |
| Code: |
+----------+-----------+-----------+
| 23 9 5 | 17 37 4 | 6 18 128 |
| 23 6 4 | 8 5 13 | 12 7 9 |
| 8 1 7 | 9 6 2 | 5 3 4 |
+----------+-----------+-----------+
| 6 4 9 | 3 8 7 | 12 5 12 |
| 5 8 1 | 2 4 6 | 7 9 3 |
| 7 3 2 | 5 1 9 | 8 4 6 |
+----------+-----------+-----------+
| 9 25 38 | 6 23 135 | 4 18 7 |
| 4 57 6 | 17 9 8 | 3 2 15 |
| 1 27 38 | 4 27 35 | 9 6 58 |
+----------+-----------+-----------+
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Play this puzzle online at the Daily Sudoku site
Yes- and there's another chain on 1s:
If 1r8c9: -1r4c9:1r4c7:-1r2c7:1r2c6:-1r7c6:1r8c4
r8c4 and r8c9 cannot both be 1 therefore r8c9<>1 |
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