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 

Jul 24 VH

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



Joined: 05 Feb 2017
Posts: 868
Location: Rimini, Italy

PostPosted: Sat Jul 24, 2021 7:51 am    Post subject: Jul 24 VH Reply with quote

Hi everyone,

Code:

+-----------+------------+------------+
| 48 49  6  | 789 2  78  | 5  1   3   |
| 2  3   89 | 1   59 58  | 4  6   7   |
| 1  5   7  | 6   4  3   | 28 89  29  |
+-----------+------------+------------+
| 3  6   58 | 2   7  9   | 1  4   58  |
| 58 7   4  | 3   6  1   | 9  2   58  |
| 9  1   2  | 5   8  4   | 7  3   6   |
+-----------+------------+------------+
| 6  249 59 | 489 1  258 | 3  7   249 |
| 7  249 3  | 49  59 6   | 28 589 1   |
| 45 8   1  | 479 3  257 | 6  59  249 |
+-----------+------------+------------+

Play this puzzle online at the Daily Sudoku site

Quote:
XY-Wing 5,8,9 in r2c36,r7c3 and -5 in r7c6
or
W-Wing 5,8 in r2c6,r4c3 SL with number 5 in r7c36 and -8 in r2c3
or
W-Wing 5,9 in r7c3,r8c5 SL with number 9 in r2c35 and -5 in r7c6


Ciao Gianni
Back to top
View user's profile Send private message
TomC



Joined: 30 Oct 2020
Posts: 349
Location: Wales

PostPosted: Sat Jul 24, 2021 5:51 pm    Post subject: Reply with quote

If you look at the above grid in box 1,2 and 7 you see three cells 48-58-45 which looks like an XY but is not!

But, if r1c1=4, r9c1=5, r7c6=5, r2c6=8 leads to no 8's in row 1
Back to top
View user's profile Send private message
Mogulmeister



Joined: 03 May 2007
Posts: 1151

PostPosted: Mon Jul 26, 2021 12:23 pm    Post subject: Reply with quote

Yes - a contradiction. When you plug the 4 into r1c1 the loop tells you it doesn't belong there.

4r1c1-(4=5)r9c1-r7c3=r7c6-(5=8)r2c6-(8=9)r2c3-(9=4)r2c2-(4)r1c1
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