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Feb 14 VH

 
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hughwill



Joined: 05 Apr 2010
Posts: 422
Location: Birmingham UK

PostPosted: Fri Feb 14, 2014 10:43 am    Post subject: Feb 14 VH Reply with quote

After basics:
Code:

+------------+------------+-------------+
| 3   489 6  | 2  458 45  | 7   49  1   |
| 24  5   18 | 9  18  7   | 34  246 236 |
| 249 12  7  | 3  14  6   | 8   5   29  |
+------------+------------+-------------+
| 7   6   58 | 1  2   58  | 9   3   4   |
| 459 489 3  | 7  69  458 | 156 126 256 |
| 1   49  2  | 45 69  3   | 56  8   7   |
+------------+------------+-------------+
| 6   3   4  | 8  7   2   | 15  19  59  |
| 25  12  15 | 6  34  9   | 34  7   8   |
| 8   7   9  | 45 345 1   | 2   46  36  |
+------------+------------+-------------+

Play this puzzle online at the Daily Sudoku site


As Early Earl (for those who like to be taken back a few years)
might have said- same old, same old (select box to see):

Quote:
124 XY-Wing pivot r3c2 is a one-stepper


A lot of basics - hidden pairs, quads etc to get there, though.

Hugh


(Where are you Clement? Missing your ultra quick solutions!) Smile
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RobertRattley



Joined: 24 Jun 2007
Posts: 118
Location: Australia

PostPosted: Fri Feb 14, 2014 1:49 pm    Post subject: Reply with quote

"A lot of basics - hidden pairs, quads etc to get there, though."

and for that reason it's not a "same old, same old" to me.

My pathway was quite different. I didn't find all the basics. Indeed, I made only one fruitful observation, which in my private terminology is "scan 3 box 6 to box 3, and then top boxes" so that box 1 cell 4 can't be 3. I missed the much easier inspection of row 1 that shows where its 3 has to be!

Still, what I did then find was an xyZ wing 249 pivot r3c1 which also leads to a one step solution.

And I was trying to solve this puzzle in time to be the first to post. I used to compete occasionally with Early Earl. I have a time-zone advantage over almost everyone, but to make use of it I have to work at a puzzle in the wee hours. This time, however, I lost energy and dozed off.
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Clement



Joined: 24 Apr 2006
Posts: 1110
Location: Dar es Salaam Tanzania

PostPosted: Fri Feb 14, 2014 8:12 pm    Post subject: Feb 14 VH Reply with quote

hughwill
I couldn't find the way quickly and decided to doze off as RobertRattley Surprised
I expect to be back as early as possible in the next puzzle Smile Watch out!
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Marty R.



Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA

PostPosted: Sat Feb 15, 2014 2:16 am    Post subject: Reply with quote

I screwed up the basics, but not fatally and used the XYZ-Wing.

From here on, I think Early Earl ought to be known as EČ. Laughing
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