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 

Mar 20 VH

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



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

PostPosted: Sun Mar 20, 2011 3:18 pm    Post subject: Mar 20 VH Reply with quote

A little tricky-lots of cleanup after basics. All I could find was a 579 XY-Wing pivot r5c9 setting r1c7 and r6c9<>5.
Back to top
View user's profile Send private message
xgameguy



Joined: 20 Jan 2011
Posts: 3

PostPosted: Mon Mar 21, 2011 5:15 pm    Post subject: Reply with quote

I too found the xy wing, but it didn't solve the puzzle for me. What am I missing? Here's what I have:

+-----------------+------------+---------------+
| 4567 467 5679 | 69 1 8 | 2379 3567 23 |
| 1569 169 8 | 2 3 7 | 4 56 59 |
| 2 3 679 | 469 46 5 | 8 167 179 |
+-------------------+------------+-------------- -+
| 1479 12479 279 | 5 247 6 | 379 1347 8 |
| 479 5 3 | 47 8 1 | 6 2 79 |
| 8 12467 267 | 3 247 9 | 57 147 157 |
+-------------------+------------+----------------+
| 37 8 4 | 1 57 23 | 2357 9 6 |
| 3679 2679 1 | 8 567 4 | 2357 357 23 |
| 3567 267 2567 | 67 9 23 | 1 8 4 |
+-----------------+------------+---------------+
Back to top
View user's profile Send private message
Julian



Joined: 28 Jul 2010
Posts: 9
Location: Menlo, GA

PostPosted: Mon Mar 21, 2011 7:51 pm    Post subject: Reply with quote

After the xy-579, there is a triple in column 9 that gets rid of the 9 in row 2.
Back to top
View user's profile Send private message
kuskey



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

PostPosted: Tue Mar 22, 2011 12:31 am    Post subject: Mar 21 VH Reply with quote

Just in case julian's hint didn't point the way, the intersection of r2 with b1, among other things, sets r13c3<>9, revealing a quad in c3.
Back to top
View user's profile Send private message
Marty R.



Joined: 12 Feb 2006
Posts: 5175
Location: Rochester, NY, USA

PostPosted: Tue Mar 22, 2011 1:05 am    Post subject: Reply with quote

Julian wrote:
After the xy-579, there is a triple in column 9 that gets rid of the 9 in row 2.

True, but just to state it another way, after the wing removes the 5 from r6c9, there is just one 5 left in column 9.
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