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 

Jun 9 VH

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



Joined: 24 Apr 2006
Posts: 685
Location: Dar es Salaam Tanzania

PostPosted: Wed Jun 08, 2011 11:15 pm    Post subject: Jun 9 VH Reply with quote

XY-Wing (25) (59) (29) pivoted in r4c7; r78c8<>2 solves it.
Back to top
View user's profile Send private message AIM Address
maddjax2



Joined: 16 Jun 2011
Posts: 1

PostPosted: Thu Jun 16, 2011 12:10 am    Post subject: Reply with quote

Sorry, I am lost on this puzzle. I have spent a while on it and must be missing something.

Can you more clearly state which cells are the XY wing and what cell it helps you clear? I don't completely understand your notation.
Back to top
View user's profile Send private message
Marty R.



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

PostPosted: Thu Jun 16, 2011 1:07 am    Post subject: Reply with quote

maddjax2 wrote:
Sorry, I am lost on this puzzle. I have spent a while on it and must be missing something.

Can you more clearly state which cells are the XY wing and what cell it helps you clear? I don't completely understand your notation.

Maybe this is where you're stuck:

Code:

+--------+-----------+------------+
| 1 5  8 | 7   6 4   | 29 239 239 |
| 4 3  6 | 5   2 9   | 8  1   7   |
| 2 7  9 | 8   1 3   | 6  45  45  |
+--------+-----------+------------+
| 6 19 2 | 3   4 7   | 59 8   159 |
| 3 19 5 | 269 8 26  | 4  7   129 |
| 7 8  4 | 29  5 1   | 3  29  6   |
+--------+-----------+------------+
| 9 26 1 | 4   3 256 | 7  256 8   |
| 5 4  3 | 26  7 8   | 1  269 29  |
| 8 26 7 | 1   9 256 | 25 34  34  |
+--------+-----------+------------+

Play this puzzle online at the Daily Sudoku site

The 59 cell is in r6c7, the 25 in r9c7 and the 29 in r6c8. Because both r7c8 and r8c8 see both the 25 and 29 cells, he is eliminating 2 from both of those cells in accordance with the definition of an XY-Wing.

An XY-Wing description can be found here:

http://www.sudopedia.org/wiki/XY-Wing
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