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 

Apr 29 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 Apr 29, 2014 8:33 am    Post subject: Apr 29 VH Reply with quote

After Basics:
Code:

+---------+--------+-----------+
| 67 4  5 | 8  3 1 | 27 26 9   |
| 3  2  1 | 9  7 6 | 5  8  4   |
| 9  67 8 | 4  2 5 | 17 16 3   |
+---------+--------+-----------+
| 2  15 3 | 15 8 7 | 9  4  6   |
| 8  9  7 | 15 6 4 | 12 3  125 |
| 4  15 6 | 2  9 3 | 8  7  15  |
+---------+--------+-----------+
| 16 68 4 | 7  5 9 | 3  12 128 |
| 5  3  2 | 6  1 8 | 4  9  7   |
| 17 78 9 | 3  4 2 | 6  5  18  |
+---------+--------+-----------+

Play this puzzle online at the Daily Sudoku site

Another VH! We're being spoiled at the end of April.
Despite the lack of unsolved cells after basics the 'traditional' solution:
Quote:
As with the last VH, a 126 XY-Wing, this time pivoted at r7c8

took a very long time to see. Too many distractions perhaps.
I suspect there are a couple of W wings too- I can see a 16 removing
the 1 in r7c8..........
Back to top
View user's profile Send private message
Marty R.



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

PostPosted: Tue Apr 29, 2014 1:41 pm    Post subject: Reply with quote

Getting away from standard VH moves, there's an easy BUG+2 in c9.

Quote:
took a very long time to see. Too many distractions perhaps.


It's been noted in the past that the more bivalue cells there are, the harder it is to find XY-Wings.
Back to top
View user's profile Send private message
mqllove



Joined: 07 Jan 2014
Posts: 20

PostPosted: Tue Apr 29, 2014 5:05 pm    Post subject: Reply with quote

Marty R. wrote:
It's been noted in the past that the more bivalue cells there are, the harder it is to find XY-Wings.


I've found that to be true for myself. Besides Marty's solution, there is an XY-wing pivoted in r7c8 that removes the 6 from r1c1. Is that the "traditional" solution you said was hard to see?
Back to top
View user's profile Send private message
Marty R.



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

PostPosted: Tue Apr 29, 2014 5:38 pm    Post subject: Reply with quote

mqllove wrote:
Marty R. wrote:
It's been noted in the past that the more bivalue cells there are, the harder it is to find XY-Wings.


I've found that to be true for myself. Besides Marty's solution, there is an XY-wing pivoted in r7c8 that removes the 6 from r1c1. Is that the "traditional" solution you said was hard to see?


Hugh said that particular XY-Wing took a long time to find and my statement was a generality about XY-Wings being more difficult to spot when there are a lot of bivalue cells.

Hugh's solution was hidden in the quote box by making the colors white on white. That is sometimes done in an original post so the reader doesn't see it if he doesn't want to. If you want to see it, just select (highlight) what's in the quote box.
Back to top
View user's profile Send private message
mqllove



Joined: 07 Jan 2014
Posts: 20

PostPosted: Tue Apr 29, 2014 7:25 pm    Post subject: Reply with quote

Got it. Thanks for the reply. Smile
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