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 

DB Saturday Puzzle - October 14, 2006

 
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: 3174
Location: near Detroit, Michigan, USA

PostPosted: Sat Oct 14, 2006 7:59 am    Post subject: DB Saturday Puzzle - October 14, 2006 Reply with quote

May be a UR in there!

Code:
Puzzle: DB101406  ******
+-------+-------+-------+
| . . . | . 3 1 | 9 . . |
| . . . | . . . | 3 . 7 |
| . . . | . . 6 | . 8 5 |
+-------+-------+-------+
| 2 . . | . 8 . | 7 1 . |
| . 4 . | . . . | . 3 . |
| . 7 8 | . 2 . | . . 6 |
+-------+-------+-------+
| 3 8 . | 7 . . | . . . |
| 5 . 2 | . . . | . . . |
| . . 7 | 9 1 . | . . . |
+-------+-------+-------+


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



Joined: 12 Feb 2006
Posts: 5160
Location: Rochester, NY, USA

PostPosted: Sat Oct 14, 2006 4:22 pm    Post subject: Reply with quote

Quote:
May be a UR in there!


There was!

After the basic stuff and a Type 4, here was my position:

Code:
-------------------------------------------------
|7    25   56   |8    3    1    |9    246  24   |
|8    12   16   |5    49   49   |3    26   7    |
|9    3    4    |2    7    6    |1    8    5    |
-------------------------------------------------
|2    59   3    |6    8    459  |7    1    49   |
|6    4    59   |1    59   7    |2    3    8    |
|1    7    8    |34   2    39   |45   459  6    |
-------------------------------------------------
|3    8    19   |7    456  245  |456  2459 1249 |
|5    19   2    |34   46   38   |468  7    19   |
|4    6    7    |9    1    258  |58   25   3    |
-------------------------------------------------


At this point, an XYZ-Wing broke open the puzzle, which is pretty rare for me, that is, for that technique to have such a powerful effect.
Back to top
View user's profile Send private message
TexCat



Joined: 07 Jul 2006
Posts: 31

PostPosted: Sat Oct 14, 2006 9:08 pm    Post subject: Reply with quote

Back to trial and error for me this week. I think I reached the same position, and then started with square 1 one way that didn't work and then did it the other way. The snag in the first way was with the 459's and so I suspect that's where the xyz-wing was, but finding xy-wings is near impossible for me, and xyz-wings are certainly impossible.
Back to top
View user's profile Send private message
Marty R.



Joined: 12 Feb 2006
Posts: 5160
Location: Rochester, NY, USA

PostPosted: Sat Oct 14, 2006 9:32 pm    Post subject: Reply with quote

Quote:
The snag in the first way was with the 459's and so I suspect that's where the xyz-wing was, but finding xy-wings is near impossible for me, and xyz-wings are certainly impossible.


Yes, the 459 in r4c6 is the base cell for the XYZ-Wing.

I'm not sure why finding the XY and XYZ is so difficult. Once you memorize or write down the patterns of each, it's just a matter of picking starting cells and scanning.

Don't hesitate to ask if you have questions. I made a pain in the butt of myself with all my questions, but I learned a lot by doing that. I'd be happy to help if I could, as would others who post here, most of whom are more advanced than I am.

Good luck.
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