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 

17 May Hard

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



Joined: 28 Mar 2006
Posts: 304
Location: Dorset UK

PostPosted: Tue May 17, 2016 3:46 pm    Post subject: 17 May Hard Reply with quote

This puzzle is solved in move 1 (changes from Hard to Easy) by using the xy wing 567 so r9c1 is 6.

Oh Dear we shouldn't be using XY wings for HARD but how can we ignore them?
Back to top
View user's profile Send private message
Marty R.



Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA

PostPosted: Tue May 17, 2016 6:19 pm    Post subject: Reply with quote

Agree, we shouldn't use wings on Hard. But none are needed on this puzzle.

Start off with the pair in b7. This grid is from Draw/Play after Auto sweep.

Code:

+------------------+-----------------+-----------------+
| 4    3579  579   | 157   6    8    | 2    357   57   |
| 3567 8     1     | 257   259  2379 | 59   3567  4    |
| 3567 35679 25679 | 257   4    2379 | 589  3567  1    |
+------------------+-----------------+-----------------+
| 57   157   3     | 1247  12   1247 | 6    8     9    |
| 678  167   67    | 3     1289 5    | 14   1247  27   |
| 9    2     4     | 1678  18   167  | 3    157   57   |
+------------------+-----------------+-----------------+
| 2    45679 5679  | 14568 3    146  | 1458 1456  568  |
| 1    3456  56    | 24568 258  246  | 7    9     2568 |
| 56   456   8     | 9     7    1246 | 145  12456 3    |
+------------------+-----------------+-----------------+

Play this puzzle online at the Daily Sudoku site
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