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 

Evil

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



Joined: 24 Apr 2006
Posts: 1057
Location: Dar es Salaam Tanzania

PostPosted: Tue May 25, 2021 8:28 am    Post subject: Evil Reply with quote

Code:

+-------+-------+-------+
| 6 . . | 4 . . | 5 9 . |
| . . . | . 1 . | . . . |
| 3 . 5 | . 9 . | . . 8 |
+-------+-------+-------+
| 1 2 . | 3 . . | 6 . . |
| 7 . . | . . . | . . 3 |
| . . 3 | . . 9 | . 1 7 |
+-------+-------+-------+
| 9 . . | . 5 . | 7 . 6 |
| . . . | . 2 . | . . . |
| . 7 8 | . . 3 | . . 1 |
+-------+-------+-------+

Play this puzzle online at the Daily Sudoku site
Back to top
View user's profile Send private message AIM Address
dongrave



Joined: 06 Mar 2014
Posts: 443

PostPosted: Tue May 25, 2021 1:31 pm    Post subject: Reply with quote

After basics:

Code:
+--------------+----------------+-------------+
| 6   18   17  | 4    3   78    | 5   9   2   |
| 28  89   279 | 5678 1   5678  | 3   67  4   |
| 3   4    5   | 267  9   267   | 1   67  8   |
+--------------+----------------+-------------+
| 1   2    49  | 3    7   45    | 6   8   59  |
| 7   5689 469 | 1256 468 12456 | 249 245 3   |
| 458 568  3   | 256  468 9     | 24  1   7   |
+--------------+----------------+-------------+
| 9   13   124 | 18   5   148   | 7   234 6   |
| 45  1356 146 | 179  2   147   | 8   345 59  |
| 245 7    8   | 69   46  3     | 249 245 1   |
+--------------+----------------+-------------+

Then I used the following chain:

(5=4)r4c6 - r78c6 = (4-6)r9c5 = (6-9)r9c4 = r8c4 - (9=5)r8c9 => r4c9 <> 5; stte.
Back to top
View user's profile Send private message
Mogulmeister



Joined: 03 May 2007
Posts: 873

PostPosted: Tue May 25, 2021 1:49 pm    Post subject: Reply Reply with quote

Hello Clement

After basics a slightly longer chain and more long hand notation (sorry its been a while)

Code:

+---------------+-----------------+--------------+
| 6   18   17   | 4    3   78     | 5   9   2    |
| 28  89   279  | 5678 1   5678   | 3   67  4    |
| 3   4    5    | 267  9   267    | 1   67  8    |
+---------------+-----------------+--------------+
| 1   2    49   | 3    7   45     | 6   8   59   |
| 7   5689 469  | 1256 468 12456  | 249 245 3    |
| 458 568  3    | 256  468 9      | 24  1   7    |
+---------------+-----------------+--------------+
| 9   13   124  | 18   5   148    | 7   234 6    |
| 45  1356 146  | 179  2   147    | 8   345 59   |
| 245 7    8    | 69   46  3      | 249 245 1    |
+---------------+-----------------+--------------+


-9(r8c4)=9(r8c9)-9(r4c9)=9(r4c3)-4(r4c3)=4(r4c6)-4(r7c6|r8c6)=4(r9c5)-6(r9c5)=6(r9c4)-9(r9c4)=9(r8c4) so r8c4 must be 9

Following the strong links from 9s onto 4's then 6's you get a discontinuous loop
9 is contradicted IN at r8c4.
-


Last edited by Mogulmeister on Tue May 25, 2021 2:25 pm; edited 2 times in total
Back to top
View user's profile Send private message
dongrave



Joined: 06 Mar 2014
Posts: 443

PostPosted: Tue May 25, 2021 2:10 pm    Post subject: Reply with quote

I'm confused Mohulmeister because you concluded that r8c4 <> 9 but I ended up with a 9 in that cell when I solved it! Could you doublecheck your solution?
Back to top
View user's profile Send private message
Mogulmeister



Joined: 03 May 2007
Posts: 873

PostPosted: Tue May 25, 2021 2:23 pm    Post subject: Reply with quote

dongrave wrote:
I'm confused Mohulmeister because you concluded that r8c4 <> 9 but I ended up with a 9 in that cell when I solved it! Could you doublecheck your solution?


Thanks Dongrave. I meant to support the contradiction that r8c4 is 9 even when you begin the chain by pulling 9 out at the start.

I have amended it accordingly !
Back to top
View user's profile Send private message
dongrave



Joined: 06 Mar 2014
Posts: 443

PostPosted: Wed May 26, 2021 12:53 pm    Post subject: Reply with quote

Oh, I see! Thanks for the clarification Mogulmeister!
Back to top
View user's profile Send private message
TomC



Joined: 30 Oct 2020
Posts: 109
Location: Wales

PostPosted: Wed May 26, 2021 6:06 pm    Post subject: Reply with quote

My solution maybe a rehash of these chains, but I solved it like this:

r56c5 <> 4 as then r9c4 =9 and r4c9 = 9 leading to no 9's in box 9

Tom
Back to top
View user's profile Send private message
Mogulmeister



Joined: 03 May 2007
Posts: 873

PostPosted: Fri May 28, 2021 2:52 pm    Post subject: Reply with quote

Nice one Tom
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