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 

No Rating: Puzzle CD_26

 
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: 3855

PostPosted: Sat Sep 27, 2008 7:13 pm    Post subject: No Rating: Puzzle CD_26 Reply with quote

Final act of redemption.

Code:
 +-----------------------+
 | 9 . . | . . 6 | . . . |
 | . 5 . | . 1 2 | . . . |
 | . . 8 | . . . | . 3 . |
 |-------+-------+-------|
 | . . . | 4 6 . | . 5 9 |
 | . 9 . | 8 3 . | . . . |
 | 5 6 . | . . 1 | 8 4 . |
 |-------+-------+-------|
 | . . . | . . 9 | 5 . . |
 | . . 9 | 2 . 3 | . . 8 |
 | . . . | 1 . . | . 9 4 |
 +-----------------------+
Back to top
View user's profile Send private message
Marty R.



Joined: 12 Feb 2006
Posts: 5166
Location: Rochester, NY, USA

PostPosted: Sat Sep 27, 2008 9:22 pm    Post subject: Reply with quote

This gave me more trouble than the others. I played a half-dozen ordinary moves before reaching an impasse. I had to resort to a 13-13-18-18-38-38 DP. There were two numbers that could kill it; one led to a contradiction and the other solved it. I suspect the more advanced players could find better solutions.
Back to top
View user's profile Send private message
nataraj



Joined: 03 Aug 2007
Posts: 1029
Location: Vienna, Austria

PostPosted: Sat Sep 27, 2008 9:55 pm    Post subject: Reply with quote

This is where I stand after basics:
Code:

+--------------------------+--------------------------+--------------------------+
| 9       137     123      | 57      8       6        | 4       12      125      |
| 4       5       6        | 3       1       2        | 9       8       7        |
| 127     17      8        | 57      9       4        | 126     3       1256     |
+--------------------------+--------------------------+--------------------------+
| 38      138     123      | 4       6       7        | 12      5       9        |
| 12      9       4        | 8       3       5        | 1267    1267    126      |
| 5       6       7        | 9       2       1        | 8       4       3        |
+--------------------------+--------------------------+--------------------------+
| 38      1378    13       | 6       4       9        | 5       127     12       |
| 17      4       9        | 2       5       3        | 167     167     8        |
| 6       2       5        | 1       7       8        | 3       9       4        |
+--------------------------+--------------------------+--------------------------+

A type 4 UR ( 38 ) gets rid of 3 in r47c2, which leaves a naked single 3 in r1c2.
After cleanup and some coloring on 2, there are a couple w-wings (12) in this position:

(1) r1c3=r7c9 via col 8 and
(1) r1c8=r4c7 via col 3

Code:

+--------------------------+--------------------------+--------------------------+
| 9       3       12       | 7       8       6        | 4       12      5        |
| 4       5       6        | 3       1       2        | 9       8       7        |
| 127     17      8        | 5       9       4        | 16      3       126      |
+--------------------------+--------------------------+--------------------------+
| 38      18      123      | 4       6       7        | 12      5       9        |
| 12      9       4        | 8       3       5        | 1267    167     16       |
| 5       6       7        | 9       2       1        | 8       4       3        |
+--------------------------+--------------------------+--------------------------+
| 38      178     13       | 6       4       9        | 5       127     12       |
| 17      4       9        | 2       5       3        | 167     167     8        |
| 6       2       5        | 1       7       8        | 3       9       4        |
+--------------------------+--------------------------+--------------------------+
Back to top
View user's profile Send private message Send e-mail Visit poster's website
tlanglet



Joined: 17 Oct 2007
Posts: 2461
Location: Northern California Foothills

PostPosted: Sun Sep 28, 2008 10:13 pm    Post subject: Reply with quote

Unless I made a silly error, I finished it off with a kite on <2> in box 4 to delete the <2> in r3c7 and a w-wing <12> with strong link on <2> in col 3 to delete <1> from r3c7 & r5c8.

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



Joined: 17 Oct 2007
Posts: 2461
Location: Northern California Foothills

PostPosted: Sun Sep 28, 2008 10:23 pm    Post subject: Reply with quote

nataraj wrote:

A type 4 UR ( 38 ) gets rid of 3 in r47c2, which leaves a naked single 3 in r1c2.
After cleanup and some coloring on 2, there are a couple w-wings (12) in this position:

(1) r1c3=r7c9 via col 8 and
(1) r1c8=r4c7 via col 3



Nataraj, I just read your comments and I suspect that your coloring on <2> is effectively the same as my kite, and I used your second w-wing option to finish up.

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 -> 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