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 

12-07-2023-daily-VH

 
Post new topic   Reply to topic    dailysudoku.com Forum Index -> Other puzzles
View previous topic :: View next topic  
Author Message
peter urhegyi



Joined: 26 Oct 2020
Posts: 28
PostPosted: Wed Jul 12, 2023 7:15 pm    Post subject: 12-07-2023-daily-VH Reply with quote
Code:

+-------+-------+-------+
| . . 6 | . . . | 2 . . |
| . 2 . | 4 . 7 | . 3 . |
| 3 . . | . . . | . . 1 |
+-------+-------+-------+
| . 4 . | 7 . 2 | . 9 . |
| . . . | . . . | . . . |
| . 8 . | 6 . 5 | . 7 . |
+-------+-------+-------+
| 2 . . | . . . | . . 4 |
| . 7 . | 3 . 8 | . 5 . |
| . . 8 | . . . | 9 . . |
+-------+-------+-------+
Back to top
View user's profile Send private message
dongrave



Joined: 06 Mar 2014
Posts: 572
PostPosted: Fri Jul 14, 2023 3:46 pm    Post subject: Reply with quote
Thanks for the puzzle Peter!

After basics:
Code:
+--------------+---------------+---------------+
| 7    9   6   | 15   135  13  |  2    4   8   |
| 8    2   1   | 4    6    7   |  5    3   9   |
| 3    5   4   | 28   28   9   |  7    6   1   |
+--------------+---------------+---------------+
| 156  4   3   | 7   e18   2   | d168  9   56  |
| 1569 16  7   | 18   349  34  |  1468 12  256 |
| 19   8   2   | 6   a4*9  5   | b14   7   3   |
+--------------+---------------+---------------+
| 2    16  5   | 9    7    16  |  3    8   4   |
| 14   7   9   | 3   f124  8   | c16   5  g26  |
| 146  3   8   | 125  1245 146 |  9    12  7   |
+--------------+---------------+---------------+

Since it was rated VH I first tried to solve it using just VH moves (i.e. X Wing, XY Wing, and XYZ Wing) with no luck so I ended up using the following chain instead: 4*r6c5-(4=1)r6c7-(1=6)r8c7-(16=8)r4c7-(8=1)r4c5-(14*=2)r8c5-(2=6)r8c9 contradiction (i.e. 6r8c79) => r6c5 <> 4; stte.
Back to top
View user's profile Send private message
peter urhegyi



Joined: 26 Oct 2020
Posts: 28
PostPosted: Sun Jul 16, 2023 7:00 am    Post subject: Re: 12-07-2023-daily-VH Reply with quote
peter urhegyi wrote:
Code:

+-------+-------+-------+
| . . 6 | . . . | 2 . . |
| . 2 . | 4 . 7 | . 3 . |
| 3 . . | . . . | . . 1 |
+-------+-------+-------+
| . 4 . | 7 . 2 | . 9 . |
| . . . | . . . | . . . |
| . 8 . | 6 . 5 | . 7 . |
+-------+-------+-------+
| 2 . . | . . . | . . 4 |
| . 7 . | 3 . 8 | . 5 . |
| . . 8 | . . . | 9 . . |
+-------+-------+-------+
Needs swordfish and several xy-wings
Back to top
View user's profile Send private message
Display posts from previous:   
Post new topic   Reply to topic    dailysudoku.com Forum Index -> Other 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