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24 March VH

 
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hughwill



Joined: 05 Apr 2010
Posts: 227
Location: Birmingham UK

PostPosted: Thu Mar 24, 2011 10:26 am    Post subject: 24 March VH Reply with quote

Once again this is late for a first post!

After basics:

Code:

+---------+------------+----------+
| 17 9  6 | 125 24 45  | 35 8 357 |
| 78 3  2 | 58  6  9   | 1  4 57  |
| 5  18 4 | 18  7  3   | 6  2 9   |
+---------+------------+----------+
| 28 28 9 | 6   1  7   | 34 5 34  |
| 4  7  3 | 9   5  2   | 8  1 6   |
| 16 16 5 | 4   3  8   | 9  7 2   |
+---------+------------+----------+
| 9  5  7 | 3   24 1   | 24 6 8   |
| 26 4  8 | 7   9  56  | 25 3 1   |
| 3  26 1 | 25  8  456 | 7  9 45  |
+---------+------------+----------+

Play this puzzle online at the Daily Sudoku site

A solution A double ended 256 XY Wing centred on R9C4 or R8C6- take your pick


But for some reason I found I'd made a mistake twice before I came to this solution!
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George Woods



Joined: 28 Mar 2006
Posts: 237
Location: Dorset UK

PostPosted: Thu Mar 24, 2011 12:11 pm    Post subject: an xyz wing Reply with quote

The Xyz wing 456 in boxes 8 and 9 alos works
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Rocky Mozell



Joined: 28 Jul 2010
Posts: 22
Location: Boston, MA

PostPosted: Thu Mar 24, 2011 3:20 pm    Post subject: Reply with quote

And a double 245 XY wing in boxes 8 and 9.
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kuskey



Joined: 10 Dec 2008
Posts: 127
Location: Pembroke, NH

PostPosted: Thu Mar 24, 2011 3:29 pm    Post subject: Mar 24 VH Reply with quote

It gave me fits too-made a mistake early and had to restart, missed the second version of the 256 XY-Wing, and found a mistake in my original notes. In addition to the solutions mentioned, I found:
1. XY-Wing 245 pivot r9c9 setting r7c5<>2
2.three versions of W-Wing 45 in c69, all with SL on 5 in r2,r8, c7 all setting r9c6<>4
3.W-Wing on 25 in c47 SL on 2 in r7 setting r8c6 and r9c9<>5
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keith



Joined: 19 Sep 2005
Posts: 3184
Location: near Detroit, Michigan, USA

PostPosted: Wed Mar 30, 2011 9:04 pm    Post subject: Reply with quote

I saw the W-wing also.

Otherwise, an X-wing on 5 opens up an XY-wing 2-45.

Keith
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