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 

May 09 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: Mon May 09, 2016 9:22 am    Post subject: May 09 VH Reply with quote
Several XY-wings. Found a one-stepper: 239, pivot r1c2 => r45c3<>9. May be there are others!
Back to top
View user's profile Send private message
hughwill



Joined: 05 Apr 2010
Posts: 424
Location: Birmingham UK
PostPosted: Mon May 09, 2016 12:09 pm    Post subject: Re: May 09 VH Reply with quote
roaa wrote:
Several XY-wings. Found a one-stepper: 239, pivot r1c2 => r45c3<>9. May be there are others!


After basics:
Code:

+--------------+---------+---------------+
| 1    23 7    | 5  9  4 | 8    6   23   |
| 29   6  5    | 8  23 7 | 1    4   239  |
| 8    4  39   | 1  23 6 | 357  35  2379 |
+--------------+---------+---------------+
| 2469 8  469  | 24 7  3 | 69   1   5    |
| 7    29 469  | 24 1  5 | 369  39  8    |
| 3    5  1    | 9  6  8 | 47   2   47   |
+--------------+---------+---------------+
| 469  39 3469 | 7  5  2 | 49   8   1    |
| 45   1  2    | 6  8  9 | 345  7   34   |
| 59   7  8    | 3  4  1 | 2    59  6    |
+--------------+---------+---------------+

Play this puzzle online at the Daily Sudoku site

Yes- two of the four 239 XY-Wings appear to do it in 1 but not
the ones pivoted at r2c1 or r3c3. In fact the two that solve it both
pivot in r1c2. It also looks as though there should be W wings as well
but I lost interest before finding any. But for a nice chain how about
If r3c8<>3 r9c8=9 r7c7=4 r8c8=3. So by elimination r123c9<>3 stte.

Last edited by hughwill on Mon May 09, 2016 10:29 pm; edited 2 times in total
Back to top
View user's profile Send private message
JC Van Hay



Joined: 13 Jun 2010
Posts: 494
Location: Charleroi, Belgium
PostPosted: Mon May 09, 2016 1:17 pm    Post subject: Reply with quote
Skyscraper : {9C28} -> r9c8=9; stte
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