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 6 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: Tue Oct 06, 2015 9:09 am    Post subject: Oct 6 VH Reply with quote

After basics:
Code:

+--------+----------+-----------+
| 6 2 39 | 57 357 1 | 8 4   79  |
| 4 1 7  | 6  9   8 | 3 2   5   |
| 5 8 39 | 2  37  4 | 1 79  6   |
+--------+----------+-----------+
| 2 3 1  | 9  6   7 | 4 5   8   |
| 9 6 5  | 8  4   2 | 7 13  13  |
| 7 4 8  | 3  1   5 | 9 6   2   |
+--------+----------+-----------+
| 1 5 24 | 47 278 3 | 6 789 479 |
| 3 7 6  | 45 58  9 | 2 18  14  |
| 8 9 24 | 1  27  6 | 5 37  347 |
+--------+----------+-----------+

Play this puzzle online at the Daily Sudoku site
A two-stepper* for a change:
Quote:
27-4 XY Wing pivot r9c5 followed by a 49-7 XY Wing pivot r7c9

*Unless someone saw it in one...

Hugh
Back to top
View user's profile Send private message
JC Van Hay



Joined: 13 Jun 2010
Posts: 494
Location: Charleroi, Belgium

PostPosted: Tue Oct 06, 2015 11:10 am    Post subject: Reply with quote

Code:
+----------+----------------+---------------+
| 6  2  39 | -7(5)  357   1 | 8  4      79  |
| 4  1  7  | 6      9     8 | 3  2      5   |
| 5  8  39 | 2      3(7)  4 | 1  (79)   6   |
+----------+----------------+---------------+
| 2  3  1  | 9      6     7 | 4  5      8   |
| 9  6  5  | 8      4     2 | 7  13     13  |
| 7  4  8  | 3      1     5 | 9  6      2   |
+----------+----------------+---------------+
| 1  5  24 | 47     278   3 | 6  7(89)  479 |
| 3  7  6  | 4(5)   (58)  9 | 2  1(8)   14  |
| 8  9  24 | 1      27    6 | 5  37     347 |
+----------+----------------+---------------+
5r1c4=5r8c4-(5=8)r8c5-8r8c8=(8-9)r7c8=(9-7)r3c8=7r3c5 :=> r1c4≠7; stte
Back to top
View user's profile Send private message
bat999



Joined: 09 Jul 2015
Posts: 55
Location: UK

PostPosted: Tue Oct 06, 2015 8:05 pm    Post subject: Reply with quote

Code:
.----------.--------------.----------------.
| 6  2  39 |  5-7  357  1 | 8   4    a79   |
| 4  1  7  |  6    9    8 | 3   2     5    |
| 5  8  39 |  2    37   4 | 1  b79    6    |
:----------+--------------+----------------:
| 2  3  1  |  9    6    7 | 4   5     8    |
| 9  6  5  |  8    4    2 | 7  b13    13   |
| 7  4  8  |  3    1    5 | 9   6     2    |
:----------+--------------+----------------:
| 1  5  24 | c47   278  3 | 6   789   49-7 |
| 3  7  6  | c45  c58   9 | 2  b18    14   |
| 8  9  24 |  1    27   6 | 5  b37    347  |
'----------'--------------'----------------'
(7=9)r1c9 - (9=8)r3589c8 - (8=7)r7c4,r8c45 => -7 r1c4,r7c9; stte
Cool
Back to top
View user's profile Send private message
roaa



Joined: 18 Apr 2009
Posts: 112
Location: Sweden

PostPosted: Thu Oct 08, 2015 6:47 pm    Post subject: Oct 6 VH Reply with quote

The XY-Wing 247, pivot r7c4, solves it in one step.
Back to top
View user's profile Send private message
Marty R.



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

PostPosted: Fri Oct 09, 2015 12:05 am    Post subject: Re: Oct 6 VH Reply with quote

roaa wrote:
The XY-Wing 247, pivot r7c4, solves it in one step.


I couldn't do it in one step. Got stuck here.

Code:

+--------+----------+---------+
| 6 2 39 | 57 357 1 | 8 4  79 |
| 4 1 7  | 6  9   8 | 3 2  5  |
| 5 8 39 | 2  37  4 | 1 79 6  |
+--------+----------+---------+
| 2 3 1  | 9  6   7 | 4 5  8  |
| 9 6 5  | 8  4   2 | 7 13 13 |
| 7 4 8  | 3  1   5 | 9 6  2  |
+--------+----------+---------+
| 1 5 2  | 47 78  3 | 6 89 49 |
| 3 7 6  | 45 58  9 | 2 18 14 |
| 8 9 4  | 1  2   6 | 5 37 37 |
+--------+----------+---------+

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



Joined: 06 Mar 2014
Posts: 563

PostPosted: Fri Oct 09, 2015 1:58 am    Post subject: Reply with quote

Me too Marty. I think Roaa just had an off day (because it doesn't look like it solves it to me either). Roaa's and Hugh's 1st XY Wing both look like they get you to Marty's grid (I think). I was surprised to see Hugh's 2nd move though because I missed his 49-7 XY Wing and instead saw the 89-7 XY Wing with pivot in r7c8 so r3c5<>7 which also solves 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