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 

May 31 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: 940
Location: Rimini, Italy
PostPosted: Tue May 31, 2022 1:17 pm    Post subject: May 31 VH Reply with quote
Hi everyone,

Code:

+-----------+-------+------------+
| 9   5  8  | 4 3 6 | 2  7  1    |
| 236 13 12 | 9 7 8 | 4  5  36   |
| 36  4  7  | 2 1 5 | 69 89 3689 |
+-----------+-------+------------+
| 7   9  5  | 1 6 2 | 8  3  4    |
| 1   8  6  | 3 5 4 | 7  29 29   |
| 4   2  3  | 7 8 9 | 1  6  5    |
+-----------+-------+------------+
| 23  37 9  | 6 4 1 | 5  28 278  |
| 5   67 4  | 8 2 3 | 69 1  679  |
| 8   16 12 | 5 9 7 | 3  4  26   |
+-----------+-------+------------+

Play this puzzle online at the Daily Sudoku site

Quote:
XY-Wing
1,3,6 in r2c29,r9c2 and -6 in r9c9
2,6,9 in r59c9,r8c7 and -9 in r8c9


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



Joined: 30 Oct 2020
Posts: 358
Location: Wales
PostPosted: Tue May 31, 2022 2:23 pm    Post subject: Reply with quote
I was drawn to a potential 23-6 XY wing (abc)

Not to be, but if x=2, a + c would both be <6> and lead to a contradiction

so r7c8=8 to solve

Code:

+------------+-------+---------------+
|  9   5  8  | 4 3 6 |  2   7   1    |
|  236 13 12 | 9 7 8 |  4   5  *36   |
| a36  4  7  | 2 1 5 | *69  89 *3689 |
+------------+-------+---------------+
|  7   9  5  | 1 6 2 |  8   3   4    |
|  1   8  6  | 3 5 4 |  7   29  29   |
|  4   2  3  | 7 8 9 |  1   6   5    |
+------------+-------+---------------+
| b23  37 9  | 6 4 1 |  5  x28 x278  |
|  5   67 4  | 8 2 3 |  69  1   679  |
|  8   16 12 | 5 9 7 |  3   4  c26   |
+------------+-------+---------------+

If x=2, c=6 also b=3, a=6 leads to no <6>'s in box 3 *


As a chain I think it would be:

(8=2)r7c8-(2=6)r9c9-(9=6)r3c7-(6=3)r3c1-(3=2)r7c1-(2=8)r7c8

r7c8 <> 2 to solve
Back to top
View user's profile Send private message
glesco



Joined: 12 May 2022
Posts: 36
PostPosted: Tue Jun 07, 2022 10:28 pm    Post subject: Reply with quote
269 xy-wing which eliminates 9 at r8c9. stte from there.
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