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 16 VH

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



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

PostPosted: Tue Jun 16, 2015 9:38 am    Post subject: Jun 16 VH Reply with quote

After basics:

Code:

+-------------+-------------+-----------+
| 7   3    2  | 189  6   4  | 5  19 18  |
| 5   49   8  | 129  123 7  | 24 6  13  |
| 469 469  1  | 5    238 39 | 24 79 378 |
+-------------+-------------+-----------+
| 3   18   9  | 78   5   2  | 6  4  17  |
| 128 158  4  | 3    78  6  | 9  17 25  |
| 26  7    56 | 4    9   1  | 8  3  25  |
+-------------+-------------+-----------+
| 169 169  67 | 1279 127 5  | 3  8  4   |
| 14  2    3  | 6    14  8  | 7  5  9   |
| 489 4589 57 | 79   347 39 | 1  2  6   |
+-------------+-------------+-----------+

Play this puzzle online at the Daily Sudoku site
Back to one step again today:
Quote:
178 XY-Wing pivot r4c9 - r3c5=8
Hugh
Back to top
View user's profile Send private message
Marty R.



Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA

PostPosted: Tue Jun 16, 2015 4:01 pm    Post subject: Reply with quote

Quote:
178 XY-Wing pivot r4c9 - r3c5=8


Hugh, maybe that happens after a few moves, but the only elimination that I can see is -8ric4.
Back to top
View user's profile Send private message
dongrave



Joined: 06 Mar 2014
Posts: 563

PostPosted: Wed Jun 17, 2015 10:13 pm    Post subject: Reply with quote

I think Marty's right that the only 'direct' result of the XY wing is the elimination of the 8 from r1c4 - but that does immediately leave r3c5 with the only remaining 8 in box 2.
Back to top
View user's profile Send private message
Marty R.



Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA

PostPosted: Thu Jun 18, 2015 5:38 am    Post subject: Reply with quote

dongrave wrote:
I think Marty's right that the only 'direct' result of the XY wing is the elimination of the 8 from r1c4 - but that does immediately leave r3c5 with the only remaining 8 in box 2.

It does indeed leave one 8 in box 2. I hate to sound petty and technical, but things might be more understandable if we standardize the way we report the result of a move. The whole idea of pincers is to preclude the number from any cell that sees both pincers. In this case, a subsequent result might be some cell = 4, but the reader can more readily see what's happening when the direct result of the move is posted.
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