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 11/08/13: ~ Extreme BBDB!!!

 
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: Sat Aug 13, 2011 10:12 pm    Post subject: Puzzle 11/08/13: ~ Extreme BBDB!!! Reply with quote
Update: I just discovered that this puzzle can be solved as an XY-rated puzzle.

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

Play this puzzle online at the Daily Sudoku site
Back to top
View user's profile Send private message
Luke451



Joined: 20 Apr 2008
Posts: 310
Location: Southern Northern California
PostPosted: Sun Aug 14, 2011 3:17 pm    Post subject: Reply with quote
Just a foolish solution here, a case of finding what you look for.

1. x-wing 4
2. x-wing 8
3. 7s: r3c8=r1c9-r7c9=r7c2 =>r3c2<>7

Leaves this position for an all-oddagon finish:
Code:
 *--------------------------------------------------------------------*
 | 5      247    6      | 1      247    9      | 3      8      47     |
 | 47     9      1      | 478    3      78     | 2      6      5      |
 | 3      24     8      | 567    2467   2567   | 9      47     1      |
 |----------------------+----------------------+----------------------|
 |*67     4678   237    | 9      24678  1      | 5      347   *67+4   |
 | 4678   1      37     | 34678  5      678    | 67     2      9      |
 | 9      4567   2357   | 367    2467   267    | 1      347    8      |
 |----------------------+----------------------+----------------------|
 | 1     *67     4      | 2      9      3      | 8      5      67     |
 |*67+8   3      57     | 5678   1      5678   | 4      9      2      |
 | 2      5678   9      | 567    678    4      | 67     1      3      |
 *--------------------------------------------------------------------*

4. (67)oddagon with a pause:
(8)r8c1=(4)r4c9-(4=7)r1c9-r1c2=r2c1-(7=6)r4c1 =>r8c1<>67
5. (47)oddagon r1c29, r36c8, r6c2
(5)r6c2=(2)r1c2-(2=4)r3c2 =>r6c2<>4

'Course, could have gone all w-wing, but how odd would that have been? Smile
Back to top
View user's profile Send private message
peterj



Joined: 26 Mar 2010
Posts: 974
Location: London, UK
PostPosted: Mon Aug 15, 2011 7:52 am    Post subject: Reply with quote
Luke, nice oddagon -and nice MUG elsewhere!

Fwiw, the two (67) bivalues are in a sort of w-wing loop which makes lots of eliminations... from Luke's grid...
Code:
w-wing-looped (6=7)r4c1 - r2c1=r1c2 - (7=6)r8c2 - r8c9=r4c9 - loop ; r46c2<>67, r8c1<>67, r4c5<>6, r9c2<>7

(Still need a wing or something to finish)

So not odd but loopy!
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