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 

Extended S-Wing w/2 digit elimination

 
Post new topic   Reply to topic    dailysudoku.com Forum Index -> Solving techniques, and terminology
View previous topic :: View next topic  
Author Message
Bud



Joined: 06 May 2010
Posts: 47
Location: Tampa, Florida

PostPosted: Tue Nov 02, 2010 12:14 am    Post subject: Extended S-Wing w/2 digit elimination Reply with quote

The cells in a 23 S-Wing are labeled *. The extension is labeled #.
The pivot at r8c3 results in either r3c1=2 or r5c1 =3 and r1c1=4. This => that r3c1<>34.

Extended S-Wing Example
Code:

+-------------------+-------------------+--------------------+
| 34#     9     6   | 7      8    34    | 1      5     2     |
| 1345    1347  8   | 2      159  1349  | 3467   3469  4679  |
| 12-3-45* 1347 235*| 3459   6    1349  | 8      349   479   |
+-------------------+-------------------+--------------------+
| 7       16    4   | 68     3    5     | 9      2     18    |
| 135*    2     35* | 689    4    69    | 56     7     18    |
| 58      68    9   | 1      2    7     | 456    46    3     |
+-------------------+-------------------+--------------------+
| 23489   348   1   | 34569  7    23469 | 2346   3469  4569  |
| 2349    34    23* | 34569  59   8     | 23467  1     45679 |
| 6       5     7   | 349    19   12349 | 234    8     49    |
+-------------------+-------------------+--------------------+


The original puzzle is the 8-2-10 tough at sudoku.com.au. I used only basic moves to reach this point in the puzzle.
Edit:
090000152 000200000 000060800
700005900 020040070 009100003
001070000 000008010 657000080


Last edited by Bud on Tue Nov 02, 2010 7:06 pm; edited 1 time in total
Back to top
View user's profile Send private message
keith



Joined: 19 Sep 2005
Posts: 3178
Location: near Detroit, Michigan, USA

PostPosted: Tue Nov 02, 2010 3:41 am    Post subject: Reply with quote

Bud,

It would be convenient if you post the original puzzle, or, at least, a link to the precise puzzle.

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



Joined: 06 May 2010
Posts: 47
Location: Tampa, Florida

PostPosted: Wed Nov 03, 2010 12:39 pm    Post subject: Reply with quote

Hi keith,
Here is the original puzzle with no basic moves. I will try to include this with any future posts.
Code:

+----------------------+---------------------+------------------------+
| 348    9       3468  | 3478   38     347   | 1       5       2      |
| 13458  134678  34568 | 2      13589  13479 | 3467    3469    4679   |
| 12345  1347    2345  | 34579  6      13479 | 8       349     479    |
+----------------------+---------------------+------------------------+
| 7      13468   3468  | 368    238    5     | 9       1246    1468   |
| 1358   2       3568  | 3689   4      369   | 56      7       1568   |
| 458    468     9     | 1      28     267   | 2456    246     3      |
+----------------------+---------------------+------------------------+
| 23489  348     1     | 34569  7      23469 | 23456   23469   4569   |
| 2349   34      234   | 34569  12359  8     | 234567  123469  145679 |
| 6      5       7     | 349    1239   12349 | 234     8       149    |
+----------------------+---------------------+------------------------+


I have shown the puzzle after the first advanced move in the diagram below. My second advanced move is also an extended S-Wing with cells labeled *. Here the 59 pivot is r8c5 which results in either r7c1=9 or r2c1=5 and r6c1=8, which => r7c1<>8. The only other advanced move I used to finish the puzzle was a 9 2-string kite.

Code:

+-------------------+-------------------+--------------------+
| 34      9     6   | 7      8    34    | 1      5     2     |
| 1345*   1347  8   | 2      159* 1349  | 3467   3469  4679  |
| 125     1347  235 | 3459   6    1349  | 8      349   479   |
+-------------------+-------------------+--------------------+
| 7       16    4   | 68     3    5     | 9      2     18    |
| 135     2     35  | 689    4    69    | 56     7     18    |
| 58*     68    9   | 1      2    7     | 456    46    3     |
+-------------------+-------------------+--------------------+
| 234-89* 348   1   | 34569  7    23469 | 2346   3469  4569  |
| 2349*   34    23  | 34569  59*  8     | 23467  1     45679 |
| 6       5     7   | 349    19   12349 | 234    8     49    |
+-------------------+-------------------+--------------------+
Back to top
View user's profile Send private message
Display posts from previous:   
Post new topic   Reply to topic    dailysudoku.com Forum Index -> Solving techniques, and terminology 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