| View previous topic :: View next topic |
| Author |
Message |
Clement
Joined: 24 Apr 2006
Posts: 1111
Location: Dar es Salaam Tanzania
|
 Posted: Tue May 25, 2021 8:28 am Post subject: Evil |
 |
|
| 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 |
|
 |
dongrave
Joined: 06 Mar 2014
Posts: 568
|
| Posted: Tue May 25, 2021 1:31 pm Post subject: |
|
|
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 |
|
|
Mogulmeister
Joined: 03 May 2007
Posts: 1151
|
| Posted: Tue May 25, 2021 1:49 pm Post subject: Reply |
|
|
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 |
|
|
dongrave
Joined: 06 Mar 2014
Posts: 568
|
| Posted: Tue May 25, 2021 2:10 pm Post subject: |
|
|
| 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 |
|
|
Mogulmeister
Joined: 03 May 2007
Posts: 1151
|
| Posted: Tue May 25, 2021 2:23 pm Post subject: |
|
|
| 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 |
|
|
dongrave
Joined: 06 Mar 2014
Posts: 568
|
| Posted: Wed May 26, 2021 12:53 pm Post subject: |
|
|
| Oh, I see! Thanks for the clarification Mogulmeister! |
|
| Back to top |
|
|
TomC
Joined: 30 Oct 2020
Posts: 358
Location: Wales
|
| Posted: Wed May 26, 2021 6:06 pm Post subject: |
|
|
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 |
|
|
Mogulmeister
Joined: 03 May 2007
Posts: 1151
|
| Posted: Fri May 28, 2021 2:52 pm Post subject: |
|
|
| Nice one Tom |
|
| Back to top |
|
|
|
FAQ
Search
Memberlist
Usergroups
Register
Profile
Log in to check your private messages
Log in
