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 

Feb 21 VH

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



Joined: 24 Apr 2006
Posts: 1110
Location: Dar es Salaam Tanzania

PostPosted: Sun Feb 20, 2011 10:08 pm    Post subject: Feb 21 VH Reply with quote

W-Wing 24 with strong link 2 in column 8; r1c6<>4 solves it. Also the other one with strong link 4 in col 7; r2c5<>2.
Back to top
View user's profile Send private message AIM Address
kragzy



Joined: 01 May 2007
Posts: 112
Location: Australia

PostPosted: Sun Feb 20, 2011 10:55 pm    Post subject: Reply with quote

A five minute puzzle that almost solved itself. Very few unsolved cells after basics, needing a a 246 XY wing to clinch it.
Back to top
View user's profile Send private message
Marty R.



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

PostPosted: Mon Feb 21, 2011 1:29 am    Post subject: Reply with quote

This is what I had after basics. There are at least a half-dozen techniques that can be used.

Code:

+--------+----------+----------+
| 24 5 7 | 1 9   46 | 8   26 3 |
| 24 3 8 | 7 246 5  | 46  9  1 |
| 1  6 9 | 3 24  8  | 45  25 7 |
+--------+----------+----------+
| 6  8 3 | 4 7   9  | 2   1  5 |
| 7  2 4 | 6 5   1  | 3   8  9 |
| 5  9 1 | 2 8   3  | 7   4  6 |
+--------+----------+----------+
| 9  4 5 | 8 16  7  | 16  3  2 |
| 3  7 2 | 9 146 46 | 156 56 8 |
| 8  1 6 | 5 3   2  | 9   7  4 |
+--------+----------+----------+

Play this puzzle online at the Daily Sudoku site
Back to top
View user's profile Send private message
kuskey



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

PostPosted: Mon Feb 21, 2011 5:44 am    Post subject: 21 Feb VH Reply with quote

Lots of ways to skin this cat. I'm not sure I got them all, but here goes:
1. three versions of the 246 XY-Wing
2. two versions of the 24 W-Wing
3. a 46 W-Wing

those are all one-steppers

What I find interesting is a series of two-steppers, all of which use a different technique in step one to set r8c57<>6. These are a type-4 UR on 16 in c78 and two versions of an X-Wing. All reveal the second step, which can be either a 145 XY-Wing or a BUG+1.

not sure I would bet the farm on all this but it was fun hunting.
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