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 

Another tough Menneske

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



Joined: 19 Sep 2005
Posts: 3355
Location: near Detroit, Michigan, USA

PostPosted: Fri May 20, 2011 9:04 am    Post subject: Another tough Menneske Reply with quote

Looks like this one is interesting. The challenge is to solve it with short chains.

I did find a Sue de Coq! I have not yet completed it.

Code:
Puzzle: M6306219sh(37)
+-------+-------+-------+
| 1 8 . | . . . | . 4 9 |
| . 9 4 | . . 1 | 6 7 . |
| . . . | . . 5 | . . . |
+-------+-------+-------+
| . 2 9 | . . 3 | . . . |
| . . . | 1 . 8 | . . . |
| . . . | 5 . . | 3 8 . |
+-------+-------+-------+
| . . . | 7 . . | . . . |
| . 4 1 | 2 . . | 8 9 . |
| 9 5 . | . . . | . 2 6 |
+-------+-------+-------+


Keith
Back to top
View user's profile Send private message
peterj



Joined: 26 Mar 2010
Posts: 974
Location: London, UK

PostPosted: Fri May 20, 2011 8:04 pm    Post subject: Reply with quote

I don't know whether the criteria stretches to a simple als move?
Quote:
xy-wing-als(35-2) (2=38)r2c45 - (3=5)r2c9 - (5=2)r1c7 ; r1c56<>2
Back to top
View user's profile Send private message
Marty R.



Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA

PostPosted: Sat May 21, 2011 5:05 am    Post subject: Reply with quote

Quote:
I did find a Sue de Coq!

Ms. de Coq and I are not acquainted.

M-Wing (25). The 5 in r1c7 proves 5 in r2c1; r1c56<>2.
Back to top
View user's profile Send private message
keith



Joined: 19 Sep 2005
Posts: 3355
Location: near Detroit, Michigan, USA

PostPosted: Sat May 21, 2011 1:57 pm    Post subject: Reply with quote

Marty R. wrote:
Ms. de Coq and I are not acquainted.
I would hope not. I believe it translates as "a boy named Sue".

After basics:
Code:
+----------------+----------------+----------------+
| 1    8    235  | 6    237  27   | 25   4    9    |
| 235  9    4    | 38   238  1    | 6    7    35   |
| 2367 367  2367 | 9    4    5    | 12   13   8    |
+----------------+----------------+----------------+
| 8    2    9    | 4    6    3    | 157  15  1-57  |
| 3457 37   357  | 1    27   8    | 9    6    24   |
| 467  1    67   | 5    9    27   | 3    8    24   |
+----------------+----------------+----------------+
| 236  36   2368 | 7    1358 9    | 4   -135  135  |
| 37   4    1    | 2    35   6    | 8    9    357  |
| 9    5    378  | 38   138  4    | 17   2    6    |
+----------------+----------------+----------------+
Sue de Coq: Take a look at B9C9.

The possibilities in R78C9 are 1357, but they cannot be 1 and 7 because of R9C7, nor 3 and 5 because of R2C9.

So, the solution in R78C9 is 1 or 7, and 3 or 5. Making the eliminations shown.

In other words, R78C9 makes two pseudocells, 17 and 35. I am still trying to understand this thing. The available explanations are not very good. In fact, if you read the discussion on the Sudopedia article, you will see that someone thinks the Sudopedia definition is wrong.

http://www.sudopedia.org/wiki/Talk:Sue_de_Coq

Here is the original article:

http://forum.enjoysudoku.com/two-sector-disjoint-subsets-t2033.html

Keith
Back to top
View user's profile Send private message
Marty R.



Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA

PostPosted: Sat May 21, 2011 4:55 pm    Post subject: Reply with quote

Thank you. I will try and digest that stuff, but don't hold your breath waiting for me to discover one. Sad

Quote:
So, the solution in R78C9 is 1 or 7, and 3 or 5.

Is that the same as saying that the combinations can be 13, 15, 37 or 57?
Back to top
View user's profile Send private message
keith



Joined: 19 Sep 2005
Posts: 3355
Location: near Detroit, Michigan, USA

PostPosted: Sat May 21, 2011 5:39 pm    Post subject: Reply with quote

Marty R. wrote:
Quote:
So, the solution in R78C9 is 1 or 7, and 3 or 5.

Is that the same as saying that the combinations can be 13, 15, 37 or 57?
Yes.

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