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 

Puzzle 10/03/27 Advanced

 
Post new topic   Reply to topic    dailysudoku.com Forum Index -> Puzzles by daj
View previous topic :: View next topic  
Author Message
daj95376



Joined: 23 Aug 2008
Posts: 3854
PostPosted: Sun Mar 28, 2010 12:36 am    Post subject: Puzzle 10/03/27 Advanced Reply with quote
Last of the M/W-Wing puzzles.

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

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



Joined: 26 Mar 2010
Posts: 974
Location: London, UK
PostPosted: Sun Mar 28, 2010 9:36 am    Post subject: Reply with quote
I found a straightforward one-stepper for this one..

(I dont know what an M-wing is, more research needed, so hope I am not going against the convention of this group...)

Quote:

XY-chain starting r4c3 (4) ending r2c5 (4); r2c3<>4


Great puzzles by the way!

[Edited] Having now researched W-Wings, it seems this might be a degenerate case where the remote pair is connected by a simple bivalue chain turning it into a simple XY-chain?
Back to top
View user's profile Send private message
arkietech



Joined: 31 Jul 2008
Posts: 1834
Location: Northwest Arkansas USA
PostPosted: Sun Mar 28, 2010 12:52 pm    Post subject: Reply with quote
There is an m-wing that solves it....I think.
Code:
 *--------------------------------------------------------------------*
 | 1      359    7      | 239    6      258    | 25     4      38     |
 | 3468   3568   34568  | 23     45     1      | 256    9      7      |
 | 3469   3569   2      | 379    457    58     | 56     1      38     |
 |----------------------+----------------------+----------------------|
 | 24     1      45     | 8      3      25     | 7      6      9      |
 | 7      39     39     | 6      1      4      | 8      5      2      |
 | 268    2568   568    | 27     57     9      | 4      3      1      |
 |----------------------+----------------------+----------------------|
 | 238    238    38     | 5      9      6      | 1      7      4      |
 | 5      7      1      | 4      2      3      | 9      8      6      |
 | 69     4      69     | 1      8      7      | 3      2      5      |
 *--------------------------------------------------------------------*
m-wing(5=4)r2c5-r2c3=(4-5)r4c3=r4c6; r13c6,r6c5<>5
Also a w-wing 45 that removes a 4 from r2c3
Back to top
View user's profile Send private message
Marty R.



Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA
PostPosted: Mon Mar 29, 2010 4:59 am    Post subject: Reply with quote
Guess I took the long way. X-Wing (8), M-Wing (39) using both the 3 and the 9, Skyscraper (3) and W-Wing (45).
Back to top
View user's profile Send private message
Display posts from previous:   
Post new topic   Reply to topic    dailysudoku.com Forum Index -> Puzzles by daj 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