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 

Helmut's 07/12/18 Advanced

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



Joined: 06 Mar 2014
Posts: 326

PostPosted: Thu Jul 12, 2018 11:13 pm    Post subject: Helmut's 07/12/18 Advanced Reply with quote

Another one that was a lot of fun! I used my favorite method again to solve it.
Code:

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



Joined: 05 Feb 2017
Posts: 386
Location: Rimini, Italy

PostPosted: Fri Jul 13, 2018 1:00 pm    Post subject: Reply with quote

Hi everyone,

W-Wing 3,9 in r7c8,r9c2 connected by number 9 in r6c28 and -3 in r7c1,r9c8

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



Joined: 06 Mar 2014
Posts: 326

PostPosted: Sat Jul 14, 2018 12:25 pm    Post subject: Reply with quote

Grid after basics.
Code:

+-------------+-------------+----------------+
| 123 23  12  | 4   67  67  | 9   5    8     |
| 9   4   6   | 1   5   8   | 7   2    3     |
| 8   5   7   | 2   3   9   | 46  1    46    |
+-------------+-------------+----------------+
| 6   279 249 | 3   278 1   | 5   4789 479   |
| 24  1   8   | 5   9   27  | 3   6    47    |
| 5   79  3   | 68  678 4   | 1   789  2     |
+-------------+-------------+----------------+
| 123 6   129 | 7   4   5   | 8   39   19    |
| 7   8   49  | 69  1   236 | 246 349  5     |
| 134 39  5   | 689 268 236 | 246 3479 14679 |
+-------------+-------------+----------------+

(9=4)r8c3-(4=39)r78c8-9r6c8=r6c2=>r9c2<>9!
Back to top
View user's profile Send private message
immpy



Joined: 06 May 2017
Posts: 234

PostPosted: Wed Jul 18, 2018 12:25 am    Post subject: Reply with quote

Kudos to you dongrave for your chain/loop savvy. I don't even pretend to get a grip on those things...lol. Different strokes for different folks, as they say. Much preferred the W-Wing approach as per Gianni.

cheers...immp
Back to top
View user's profile Send private message
dongrave



Joined: 06 Mar 2014
Posts: 326

PostPosted: Wed Jul 18, 2018 12:57 am    Post subject: Reply with quote

immpy wrote:
Kudos to you dongrave for your chain/loop savvy. I don't even pretend to get a grip on those things...lol. Different strokes for different folks, as they say. Much preferred the W-Wing approach as per Gianni.

cheers...immp

Ha! Thanks immpy! I know what you mean! You know what? I heard that Keith doesn't use pencil marks! I've thought about asking a doctor to visit him sometime! Smile
Back to top
View user's profile Send private message
keith



Joined: 19 Sep 2005
Posts: 3341
Location: near Detroit, Michigan, USA

PostPosted: Wed Aug 08, 2018 3:12 pm    Post subject: Reply with quote

I try not to use pencil marks. But I do use them on occasion, especially for VH and Advanced puzzles. It's a way to make easier puzzles a little more challenging.

I start by putting in PMs only for cells that have two candidates. That will find XY-wings, etc.

Since I developed the idea of patterns of cells where useful strong links can lie, I have become quite good at finding skyscrapers and kites with no PMs.

Keith
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