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 

Mar 18 VH

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



Joined: 10 Dec 2008
Posts: 141
Location: Pembroke, NH

PostPosted: Fri Mar 18, 2011 4:36 am    Post subject: Mar 18 VH Reply with quote

Similar to a recent puzzle. A couple of one-steppers:
1. XYZ-Wing 789 pivot at r1c2 setting r3c2<>8
2. XYZ-Wing 378 pivot at r3c2 setting r1c2<>7
A couple of two steppers:
a common first step of a type 3 UR in 37 at c23 setting r39c2<>7 followed by a choice of:
1.XY-Wing 378 pivot at r3c2 setting r9c3<>7
2.XY-Wing 378 pivot r7c2 setting r9c2 and r3c3<>3
Back to top
View user's profile Send private message
Ema Nymton



Joined: 17 Apr 2009
Posts: 89

PostPosted: Sat Mar 19, 2011 7:20 am    Post subject: Reply with quote

.

Color me dense.

Basic

Code:

+--------------+----------------+----------+
| 89  789  6   | 4   27    5    | 1   28 3 |
| 2   1    4   | 68  68    3    | 9   7  5 |
| 5   378  378 | 27  9     1    | 4   28 6 |
+--------------+----------------+----------+
| 68  4    128 | 5   12678 2678 | 78  3  9 |
| 7   5689 289 | 3   268   268  | 58  4  1 |
| 3   58   18  | 9   178   4    | 578 6  2 |
+--------------+----------------+----------+
| 1   78   5   | 278 3     278  | 6   9  4 |
| 689 2    89  | 1   4     68   | 3   5  7 |
| 4   367  37  | 67  5     9    | 2   1  8 |
+--------------+----------------+----------+


Your step one leads logically to:

Code:

+--------------+----------------+----------+
| 89  789  6   | 4   27    5    | 1   28 3 |
| 2   1    4   | 68  68    3    | 9   7  5 |
| 5   37   378 | 27  9     1    | 4   28 6 |
+--------------+----------------+----------+
| 68  4    128 | 5   12678 2678 | 78  3  9 |
| 7   5689 289 | 3   268   268  | 58  4  1 |
| 3   58   18  | 9   178   4    | 578 6  2 |
+--------------+----------------+----------+
| 1   78   5   | 278 3     278  | 6   9  4 |
| 689 2    89  | 1   4     68   | 3   5  7 |
| 4   367  37  | 67  5     9    | 2   1  8 |
+--------------+----------------+----------+


Step two seem not to follow. What am I missing?

"Similar to a recent puzzle. A couple of one-steppers:
...
2. XYZ-Wing 378 pivot at r3c2 setting r1c2<>7"?

Ema Nymton
.
Back to top
View user's profile Send private message
lg161



Joined: 17 Oct 2006
Posts: 12

PostPosted: Sat Mar 19, 2011 1:46 pm    Post subject: mar 18 vh Reply with quote

I agree. The solution posted makes no sense. Could someone explain it better?
Back to top
View user's profile Send private message
Marty R.



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

PostPosted: Sat Mar 19, 2011 2:15 pm    Post subject: Reply with quote

Ema, in your first grid there should not be an 8 in r3c3 because of the 1289 quad in column 3. This will change things considerably.
Back to top
View user's profile Send private message
lg161



Joined: 17 Oct 2006
Posts: 12

PostPosted: Sat Mar 19, 2011 2:51 pm    Post subject: Reply with quote

Thank you Marty, that did it!
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