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 

Oct 16 VH

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



Joined: 05 Apr 2010
Posts: 422
Location: Birmingham UK

PostPosted: Wed Oct 16, 2013 8:30 am    Post subject: Oct 16 VH Reply with quote

After basics:
Code:

+--------------+-------------+--------------+
| 127  8   257 | 17  9   6   | 3   257  4   |
| 1247 9   257 | 3   248 158 | 256 2567 126 |
| 3    457 6   | 147 24  15  | 9   8    12  |
+--------------+-------------+--------------+
| 78   567 4   | 9   68  2   | 1   56   3   |
| 9    356 235 | 14  7   13  | 256 2456 8   |
| 28   36  1   | 5   468 38  | 7   246  9   |
+--------------+-------------+--------------+
| 6    2   9   | 8   1   7   | 4   3    5   |
| 47   347 378 | 2   5   9   | 68  1    67  |
| 5    1   78  | 6   3   4   | 28  9    27  |
+--------------+-------------+--------------+

Play this puzzle online at the Daily Sudoku site
The usual answer- a
Quote:
368 XY wing pivot r6c6 removing the 6 in r6c5

solves the puzzle
Back to top
View user's profile Send private message
TerenceF



Joined: 21 Dec 2007
Posts: 26
Location: Takapuna, NZ

PostPosted: Wed Oct 16, 2013 9:52 am    Post subject: Reply with quote

Fastest puzzle in a while?

The XY wing identified by Hugh is revealed after only one basic move from the starting position:
Code:

+----------------+------------------+-----------------+
| 127  8    257  | 127  9     6     | 235  2357  4    |
| 1247 9    257  | 3    12458 14578 | 256  2567  1267 |
| 3    1457 6    | 1247 1245  1457  | 259  8     1279 |
+----------------+------------------+-----------------+
| 678  3567 4    | 89   68    2     | 1    356   369  |
| 9    356  235  | 14   7     134   | 2356 23456 8    |
| 268  36   1    | 5    468   348   | 7    2346  2369 |
+----------------+------------------+-----------------+
| 1678 2    3789 | 178  18    178   | 4    367   5    |
| 4678 3467 378  | 2478 2458  9     | 2368 1     2367 |
| 5    147  78   | 6    3     1478  | 28   9     27   |
+----------------+------------------+-----------------+

The 178 triple in r7 box 8 forces r9c6 = 4, hence r6c6 = 38, revealing the wing that solves the puzzle
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