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hughwill
Joined: 05 Apr 2010
Posts: 424
Location: Birmingham UK
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 Posted: Wed Jul 31, 2013 9:51 am Post subject: July 31st VH |
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| Code: |
+---------+-----------+------------+
| 9 8 13 | 4 5 6 | 17 137 2 |
| 6 4 13 | 7 8 2 | 9 13 5 |
| 5 7 2 | 3 1 9 | 4 8 6 |
+---------+-----------+------------+
| 14 2 8 | 5 79 3 | 6 49 17 |
| 3 5 79 | 1 6 47 | 2 49 8 |
| 14 6 79 | 89 2 478 | 3 5 17 |
+---------+-----------+------------+
| 78 1 4 | 6 3 78 | 5 2 9 |
| 78 9 5 | 2 4 1 | 78 6 3 |
| 2 3 6 | 89 79 5 | 178 17 4 |
+---------+-----------+------------+
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Play this puzzle online at the Daily Sudoku site
A touch of the usual:
| Quote: | | Either of the 'double' 479 XY wings in boxes 5 and 6 |
The obvious Type 1 UR on 13 doesn't quite do it, I think.... |
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roaa
Joined: 18 Apr 2009
Posts: 112
Location: Sweden
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| Posted: Thu Aug 01, 2013 4:01 pm Post subject: |
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| The xy-wing 479 pivoted in r5c6 makes it in one step. |
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hughwill
Joined: 05 Apr 2010
Posts: 424
Location: Birmingham UK
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| Posted: Thu Aug 01, 2013 4:52 pm Post subject: |
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roaa said:
| Quote: | | The xy-wing 479 pivoted in r5c6 makes it in one step. |
In my first post I used the approach used in some of the older posts
to this forum to hide the same solution. I guess it was done so that if
stuck you could get a clue without the full solution. If you 'drag to select'
in the white area of the quote the solution appears. It's done by changing
the font colour to white of course.......
And I learnt the trick from Marty R so it must be good!  |
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RobertRattley
Joined: 24 Jun 2007
Posts: 118
Location: Australia
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| Posted: Sat Aug 03, 2013 4:31 pm Post subject: |
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I enjoy each daily puzzle on this site. The "hard" ones I sometimes find more time consuming than the "very hard", usually because by the time I get to the pencil-mark stage there's already something I've missed.
What I liked about this particular puzzle was the 2 "hard" steps before the pencil marks revealed the XY wing(s), namely, the early pair 14 in box 4 and the much later pair 49 in box 6. So for me this puzzle was richer than a "touch of the usual". |
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