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 

Oct. 31 VH

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



Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA
PostPosted: Wed Oct 31, 2012 4:42 am    Post subject: Oct. 31 VH Reply with quote
Code:

+-----------+------------+---------------+
| 48 1468 3 | 789 5   69 | 2    147 78   |
| 5  18   2 | 3   78  4  | 9    17  6    |
| 7  468  9 | 1   28  26 | 458  3   58   |
+-----------+------------+---------------+
| 3  258  6 | 789 4   29 | 1    57  2578 |
| 48 248  7 | 6   1   5  | 38   9   238  |
| 9  258  1 | 78  278 3  | 578  6   4    |
+-----------+------------+---------------+
| 2  9    4 | 5   3   7  | 6    8   1    |
| 1  37   5 | 4   6   8  | 37   2   9    |
| 6  37   8 | 2   9   1  | 3457 457 357  |
+-----------+------------+---------------+

Play this puzzle online at the Daily Sudoku site

I'm stuck. Oh, I can solve the puzzle, but I can't see any of the standard VH moves, i.e., X-, XY- or XYZ-Wing. There has to be at least one in there unless Sam is playing some kind of Halloween trick. Wink
Back to top
View user's profile Send private message
arkietech



Joined: 31 Jul 2008
Posts: 1834
Location: Northwest Arkansas USA
PostPosted: Wed Oct 31, 2012 6:43 am    Post subject: Reply with quote
Code:
 *-----------------------------------------------------------*
 | 4-8   146-8 3     | 789   5     69    | 2     147  a78    |
 | 5    c18    2     | 3     78    4     | 9    b17    6     |
 | 7     468   9     | 1     28    26    | 458   3     58    |
 |-------------------+-------------------+-------------------|
 | 3     258   6     | 789   4     29    | 1     57    2578  |
 | 48    248   7     | 6     1     5     | 38    9     238   |
 | 9     258   1     | 78    278   3     | 578   6     4     |
 |-------------------+-------------------+-------------------|
 | 2     9     4     | 5     3     7     | 6     8     1     |
 | 1     37    5     | 4     6     8     | 37    2     9     |
 | 6     37    8     | 2     9     1     | 3457  457   357   |
 *-----------------------------------------------------------*
xy-wing
(8=7)r1c9-(7=1)r2c8-(1=8)r2c2 => -8r1c12; stte
Back to top
View user's profile Send private message
George Woods



Joined: 28 Mar 2006
Posts: 304
Location: Dorset UK
PostPosted: Wed Oct 31, 2012 9:36 am    Post subject: Is this a perverse solution almost an Xy wing? Reply with quote
r1c8 is either 7 or not. If not than xy wing 148 pivoted in r1c1 makes r2c8 7 Aliter r1c8 is 7 so r1c9 cannot be 7 and this solves it.
Back to top
View user's profile Send private message
Marty R.



Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA
PostPosted: Wed Oct 31, 2012 3:21 pm    Post subject: Reply with quote
Quote:
xy-wing
(8=7)r1c9-(7=1)r2c8-(1=8)r2c2 => -8r1c12; stte


ARRRGH!! Embarassed Crying or Very sad
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