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 

Set H Puzzle 18

 
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 Dec 28, 2008 6:49 pm    Post subject: Set H Puzzle 18 Reply with quote
Code:
 +-----------------------+
 | 6 3 . | . . . | . 8 . |
 | 1 . 7 | 6 8 . | 9 2 . |
 | . 9 . | . . 2 | . . . |
 |-------+-------+-------|
 | . 8 . | 1 5 9 | . . . |
 | . 2 . | 8 . . | 3 7 . |
 | . . 1 | 2 . . | . . . |
 |-------+-------+-------|
 | . 7 . | . 2 . | 8 . . |
 | 8 1 . | . 7 . | . 4 . |
 | . . . | . . . | . . 7 |
 +-----------------------+

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



Joined: 18 Oct 2007
Posts: 1741
PostPosted: Mon Dec 29, 2008 10:54 am    Post subject: Reply with quote
Code:
.------------------.------------------.------------------.
| 6     3     2    | 79   #19    45   |#17    8     45   |
| 1     4     7    | 6     8     35   | 9     2     35   |
| 5     9     8    | 347  #14    2    | 1467  13    346  |
:------------------+------------------+------------------:
| 7     8     3    | 1     5     9    | 24    6     24   |
| 9     2     5    | 8    #46    46   | 3     7     1    |
| 4     6     1    | 2     3     7    | 5     9     8    |
:------------------+------------------+------------------:
| 3     7     469  | 49    2     1    | 8     5     69   |
| 8     1     69   | 5     7     36   | 26    4     2369 |
| 2     5     469  | 349  4-69   8    |#16    13    7    |
'------------------'------------------'------------------'

the strong links on 1 in row 1 see the {1,4} cell in r3c5 and the {1,6} cell in r9c7, tells us that either 4 or 6 is true. a little extension to the 4 in r5c5 and the 6 is true there. eliminates the 6 in r9c5, singles from there.

(6=1)r9c7 - (1)r1c7 = (1)r1c5 - (1=4)r3c5 - (4=6)r5c5; r9c5 <> 6
Back to top
View user's profile Send private message
cgordon



Joined: 04 May 2007
Posts: 769
Location: ontario, canada
PostPosted: Mon Dec 29, 2008 2:49 pm    Post subject: Reply with quote
No elegant solution for me - I had to work hard for this one.
A type 6 UR on <69> left an xy wing on <469>
Colouring removed the <3> from R3C9 leaving a very wide xy wing for <469>
An xy wing <137> left a triple to finish it off.

Good one!
Back to top
View user's profile Send private message
Marty R.



Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA
PostPosted: Wed Dec 31, 2008 5:57 am    Post subject: Reply with quote
It wasn't hard work, but I used a half-dozen assorted moves which led to a BUG+1.
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