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 

July 12 BrainBashers

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



Joined: 17 Oct 2007
Posts: 2468
Location: Northern California Foothills

PostPosted: Sun Jul 12, 2009 9:42 pm    Post subject: July 12 BrainBashers Reply with quote

Code:



 *-----------*
 |..1|6.2|3..|
 |...|.5.|...|
 |8..|391|..5|
 |---+---+---|
 |739|..5|6.2|
 |265|9..|74.|
 |148|2..|953|
 |---+---+---|
 |612|784|539|
 |...|12.|8..|
 |.87|5.9|12.|
 *-----------*
Back to top
View user's profile Send private message
storm_norm



Joined: 18 Oct 2007
Posts: 1741

PostPosted: Mon Jul 13, 2009 1:50 am    Post subject: Reply with quote

UR type 3
Back to top
View user's profile Send private message
tlanglet



Joined: 17 Oct 2007
Posts: 2468
Location: Northern California Foothills

PostPosted: Mon Jul 13, 2009 3:10 am    Post subject: Reply with quote

I don't see a lot of useful Type 3 URs but in this case it does the trick.

However, when I ignored the UR, it became a difficult puzzle for me to solve.

Ted
Back to top
View user's profile Send private message
Steve R



Joined: 24 Oct 2005
Posts: 289
Location: Birmingham, England

PostPosted: Mon Jul 13, 2009 11:37 am    Post subject: Reply with quote

Ted, I think you may have overlooked a W-Wing.

Code:
+-------------------------------------+
| 459 579 1   | 6  47  2  | 3  89 78  |
| 349 279 346 | 48 5   78 | 24 19 167 |
| 8   27  46  | 3  9   1  | 24 67 5   |
---------------------------------------
| 7   3   9   | 48 14  5  | 6  18 2   |
| 2   6   5   | 9  13  38 | 7  4  18  |
| 1   4   8   | 2  67  67 | 9  5  3   |
---------------------------------------
| 6   1   2   | 7  8   4  | 5  3  9   |
| 59  59  34  | 1  2   36 | 8  67 467 |
| 34  8   7   | 5  36  9  | 1  2  46  |
+-------------------------------------+

The candidates (78) in r1c9 and r2c6 line up with the conjugates for 8 in row 5 so one of these two cells must contain 7.

The elimination of 7 from r1c5 solves the puzzle.

Steve
Back to top
View user's profile Send private message
tlanglet



Joined: 17 Oct 2007
Posts: 2468
Location: Northern California Foothills

PostPosted: Mon Jul 13, 2009 12:56 pm    Post subject: Reply with quote

Steve R wrote:
Ted, I think you may have overlooked a W-Wing.


Thanks Steve, you nailed it Exclamation I paid the price of overlooking it by working longer until I finally found a xy-chain, which is unusual for a BrainBuster..

Ted
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