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 

Nov 2 2005 Very hard

 
Post new topic   Reply to topic    dailysudoku.com Forum Index -> Daily Sudoku puzzles
View previous topic :: View next topic  
Author Message
sirr2834



Joined: 06 Aug 2006
Posts: 3

PostPosted: Sun Aug 06, 2006 5:52 pm    Post subject: Nov 2 2005 Very hard Reply with quote

48x 3xx xxx
9x7 452 x8x
xx3 1x8 74x
8x5 713 4xx
7xx 946 xx8
x49 825 1x7
x94 581 27x
17x 234 xx5
xxx 6xx x14
Back to top
View user's profile Send private message
keith



Joined: 19 Sep 2005
Posts: 3179
Location: near Detroit, Michigan, USA

PostPosted: Sun Aug 06, 2006 6:41 pm    Post subject: Looking for a hint? Reply with quote

If you're looking for a hint:

Where are the 3's in C8? This should allow you to place a 5 in R, and one in R1.

Keith
Back to top
View user's profile Send private message
sirr2834



Joined: 06 Aug 2006
Posts: 3

PostPosted: Sun Aug 06, 2006 7:45 pm    Post subject: Reply with quote

yes that definitely helps a little but im still not seeing the rest for some reason, if you have another hint thanks, otherwise ill keeping looking
48x 3xx x5x
9x7 452 x8x
xx3 1x8 74x
8x5 713 4xx
7xx 946 5x8
x49 825 1x7
x94 581 27x
17x 234 xx5
xxx 6xx x14
Back to top
View user's profile Send private message
David Bryant



Joined: 29 Jul 2005
Posts: 559
Location: Denver, Colorado

PostPosted: Sun Aug 06, 2006 8:25 pm    Post subject: Triplet {6, 7, 9} in row 1 Reply with quote

At this point in the puzzle you can identify a "hidden pair" {1, 2} in r1c3 & r1c9. There are two ways to locate it.

-- Since the values "1" and "2" are already entered in the top center 3x3 box, and also in column 4, it is evident that the pair {1, 2} must lie in r1c3 & r1c9 -- there's no other way to fit those two values into the top row.

-- Alternatively, if you're looking at candidate lists for the unresolved cells, you can find the triplet {6, 7, 9} in r1c5, r1c6, & r1c7, implying that the other two values -- "1" and "2" -- must lie in r1c3 & r1c9.

The only possibilities at r5c3 are {1, 2} -- this pairs up with the {1, 2} in r1c3, making a naked pair in column 3 and implying that r9c3 = 8 (and then r8c3 = 6 ...). dcb
Back to top
View user's profile Send private message Send e-mail Visit poster's website
sirr2834



Joined: 06 Aug 2006
Posts: 3

PostPosted: Mon Aug 07, 2006 3:34 am    Post subject: Reply with quote

thanks, found that one, sorry I didnt reply before you spent your time explaining, but that was very helpful thanks once again
Back to top
View user's profile Send private message
Display posts from previous:   
Post new topic   Reply to topic    dailysudoku.com Forum Index -> Daily Sudoku 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