dailysudoku.com Forum Index dailysudoku.com
Discussion of Daily Sudoku puzzles
 
 FAQFAQ   SearchSearch   MemberlistMemberlist   UsergroupsUsergroups   RegisterRegister 
 ProfileProfile   Log in to check your private messagesLog in to check your private messages   Log inLog in 

Nov 20 VH

 
Post new topic   Reply to topic    dailysudoku.com Forum Index -> Daily Sudoku puzzles
View previous topic :: View next topic  
Author Message
roaa



Joined: 18 Apr 2009
Posts: 112
Location: Sweden

PostPosted: Fri Nov 20, 2015 9:32 am    Post subject: Nov 20 VH Reply with quote

I needed no advanced technique at all! Am I right?
Back to top
View user's profile Send private message
hughwill



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

PostPosted: Fri Nov 20, 2015 10:29 am    Post subject: Re: Nov 20 VH Reply with quote

roaa wrote:
I needed no advanced technique at all! Am I right?

I got to here with basics:
Code:

+-------------+------------------+--------------+
| 2    18 4   | 368   136  138   | 7  5   9     |
| 35   7  6   | 358   9    3458  | 1  2   348   |
| 359  18 59  | 2     1345 7     | 6  348 348   |
+-------------+------------------+--------------+
| 589  6  59  | 4     1357 13589 | 2  138 13578 |
| 458  3  7   | 58    2    158   | 9  6   1458  |
| 4589 2  1   | 35789 357  6     | 58 348 34578 |
+-------------+------------------+--------------+
| 67   4  238 | 1     67   23    | 58 9   258   |
| 16   5  23  | 369   8    239   | 4  7   12    |
| 17   9  28  | 57    457  245   | 3  18  6     |
+-------------+------------------+--------------+

Play this puzzle online at the Daily Sudoku site

and then needed the 18-2 XY-Wing to polish it off. I can't see any more
basics, but I may be wrong....

Hugh
Back to top
View user's profile Send private message
yeoks



Joined: 16 May 2010
Posts: 33

PostPosted: Fri Nov 20, 2015 12:01 pm    Post subject: Reply with quote

Hugh,
Take a look at Row 1 again.
Back to top
View user's profile Send private message
hughwill



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

PostPosted: Fri Nov 20, 2015 4:03 pm    Post subject: Reply with quote

yeoks wrote:
Hugh,
Take a look at Row 1 again.


Entirely correct. The absence of all those 3s makes it a basics only. I wonder
if this happens when there's a box-line interaction and a VH solution (the XY-wing) at
the same time and the software gives the VH solution precendence. I've
noticed that there are few if any wings in non VH puzzles.....

Hugh
Back to top
View user's profile Send private message
Display posts from previous:   
Post new topic   Reply to topic    dailysudoku.com Forum Index -> Daily Sudoku puzzles All times are GMT
Page 1 of 1

 
Jump to:  
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum


Powered by phpBB © 2001, 2005 phpBB Group