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 

VH Oct 27
Goto page 1, 2  Next
 
Post new topic   Reply to topic    dailysudoku.com Forum Index -> Daily Sudoku puzzles
View previous topic :: View next topic  
Author Message
Mogulmeister



Joined: 03 May 2007
Posts: 1151

PostPosted: Wed Oct 27, 2021 8:46 am    Post subject: VH Oct 27 Reply with quote

Code:
+--------------+---------------+--------------+
| 14  13  5    | 34  8    2    | 7   9   6    |
| 9   38  2    | 6   1347 157  | 34  15  58   |
| 48  7   6    | 345 134  9    | 3   125 258  |
+--------------+---------------+--------------+
| 3   6   7    | 2   9    4    | 5   8   1    |
| 5   4   9    | 38  13   18   | 2   6   7    |
| 18  2   18   | 7   5    6    | 9   4   3    |
+--------------+---------------+--------------+
| 2   58  48   | 1   47   57   | 6   3   9    |
| 7   15  14   | 9   6    3    | 8   25  245  |
| 6   9   3    | 458 2    58   | 1   7   45   |
+--------------+---------------+--------------+


After basics.

Quote:
Two XY wings - firstly a <348> eliminating 4 in r3c8 followed by a <134> eliminating 3's in r2c5 and r5c4 .


Last edited by Mogulmeister on Wed Oct 27, 2021 8:54 am; edited 1 time in total
Back to top
View user's profile Send private message
Mogulmeister



Joined: 03 May 2007
Posts: 1151

PostPosted: Wed Oct 27, 2021 8:47 am    Post subject: Reply with quote

A nice challenge for the single step.
Back to top
View user's profile Send private message
Earl



Joined: 30 May 2007
Posts: 677
Location: Victoria, KS

PostPosted: Wed Oct 27, 2021 11:20 am    Post subject: Oct27 VH Reply with quote

458xyzwing@R7C2, -4R8C2

Early Earl

PS
The above worked the first time, but on retry, I needed two xywings:
348xywing@R3C1, -3R2C7 and 134xywing@R3C3, -3R5C4.
Sorry if I misled anyone. Senior moment!


Last edited by Earl on Wed Oct 27, 2021 1:11 pm; edited 1 time in total
Back to top
View user's profile Send private message Send e-mail
Mogulmeister



Joined: 03 May 2007
Posts: 1151

PostPosted: Wed Oct 27, 2021 12:17 pm    Post subject: Re: Oct27 VH Reply with quote

Earl wrote:
458xyzwing@R7C2, -4R8C2

Early Earl


Did you mean r8c2 Earl ?
Back to top
View user's profile Send private message
Mogulmeister



Joined: 03 May 2007
Posts: 1151

PostPosted: Wed Oct 27, 2021 1:45 pm    Post subject: Re: Oct27 VH Reply with quote

Earl wrote:
458xyzwing@R7C2, -4R8C2

Early Earl

PS
The above worked the first time, but on retry, I needed two xywings:
348xywing@R3C1, -3R2C7 and 134xywing@R3C3, -3R5C4.
Sorry if I misled anyone. Senior moment!


No worries at all! We’ve been on this board a long time and seen a few….some junior moments too!
Back to top
View user's profile Send private message
immpy



Joined: 06 May 2017
Posts: 570

PostPosted: Wed Oct 27, 2021 5:47 pm    Post subject: Reply with quote

Just looking at Mogulmeister's grid, there was just one oversight. With the 3 already placed in r3c7, this makes r2c7<>3(=4!). And r3c45<>3 as well.
Back to top
View user's profile Send private message
immpy



Joined: 06 May 2017
Posts: 570

PostPosted: Wed Oct 27, 2021 5:48 pm    Post subject: Reply with quote

Here is a revised after basics grid:

Code:

+----------+-------------+-----------+
| 14 13 5  | 34  8   2   | 7 9   6   |
| 9  38 2  | 6   137 157 | 4 15  58  |
| 48 7  6  | 45  14  9   | 3 125 258 |
+----------+-------------+-----------+
| 3  6  7  | 2   9   4   | 5 8   1   |
| 5  4  9  | 38  13  18  | 2 6   7   |
| 18 2  18 | 7   5   6   | 9 4   3   |
+----------+-------------+-----------+
| 2  58 48 | 1   47  57  | 6 3   9   |
| 7  15 14 | 9   6   3   | 8 25  245 |
| 6  9  3  | 458 2   58  | 1 7   45  |
+----------+-------------+-----------+

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



Joined: 06 May 2017
Posts: 570

PostPosted: Wed Oct 27, 2021 5:52 pm    Post subject: Reply with quote

Now the one step solution becomes the XY-Wing: 1/4/3 in r1c4,r35c5=>r2c5,r5c4<>3.

cheers...immp
Back to top
View user's profile Send private message
Mogulmeister



Joined: 03 May 2007
Posts: 1151

PostPosted: Wed Oct 27, 2021 6:21 pm    Post subject: Reply with quote

That's better - thanks Immp! Sorry folks! Posted it slightly undercooked. As you say Immp - no need now for the first XY I suggested.

immpy wrote:
Here is a revised after basics grid:

Code:

+----------+-------------+-----------+
| 14 13 5  | 34  8   2   | 7 9   6   |
| 9  38 2  | 6   137 157 | 4 15  58  |
| 48 7  6  | 45  14  9   | 3 125 258 |
+----------+-------------+-----------+
| 3  6  7  | 2   9   4   | 5 8   1   |
| 5  4  9  | 38  13  18  | 2 6   7   |
| 18 2  18 | 7   5   6   | 9 4   3   |
+----------+-------------+-----------+
| 2  58 48 | 1   47  57  | 6 3   9   |
| 7  15 14 | 9   6   3   | 8 25  245 |
| 6  9  3  | 458 2   58  | 1 7   45  |
+----------+-------------+-----------+

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



Joined: 30 Oct 2020
Posts: 349
Location: Wales

PostPosted: Wed Oct 27, 2021 6:51 pm    Post subject: Reply with quote

How is the 3 placed in r3c7 with basics?
Back to top
View user's profile Send private message
Mogulmeister



Joined: 03 May 2007
Posts: 1151

PostPosted: Wed Oct 27, 2021 7:02 pm    Post subject: Reply with quote

Absolutely no idea Tom - how could anyone stuff up basics ? Embarassed Laughing
Back to top
View user's profile Send private message
Mogulmeister



Joined: 03 May 2007
Posts: 1151

PostPosted: Wed Oct 27, 2021 7:04 pm    Post subject: Reply with quote

I should probably retire and leave it to Gianni.
Back to top
View user's profile Send private message
TomC



Joined: 30 Oct 2020
Posts: 349
Location: Wales

PostPosted: Thu Oct 28, 2021 6:34 am    Post subject: Reply with quote

Mogulmeister, your initial post and solution is perfectly correct, confusion arises from the first grid showing r3c7 as <3> and not <34>
Back to top
View user's profile Send private message
Mogulmeister



Joined: 03 May 2007
Posts: 1151

PostPosted: Thu Oct 28, 2021 7:16 am    Post subject: Reply with quote

Yes - a mispost of the grid. That or fat finger syndrome.
Back to top
View user's profile Send private message
Mogulmeister



Joined: 03 May 2007
Posts: 1151

PostPosted: Thu Oct 28, 2021 7:52 am    Post subject: Reply with quote

...all adds a bit of colour. Perhaps I was subconsciously remembering a post here from 2011:

cgordon wrote:
It's been a while - but out of curiosity I revisted this forum and was interested in the comments about declining interest.

For a few years I was an avid participant of the sudoku forums.
I can recall my banters with other posters such as Nataraj and Asellius where solving problems would lead to discussions on Austrian wine or American beer. There was a social context to the forum.

But then the VH forums seemed to lose sociabilty - to the point where the regular posts now seem to consist of one regular guy revealing an xy wing.
Back to top
View user's profile Send private message
Mogulmeister



Joined: 03 May 2007
Posts: 1151

PostPosted: Thu Oct 28, 2021 8:34 am    Post subject: Reply with quote

Code:

+-------+-------+-------+
| . . 5 | . 8 . | . 9 . |
| . . 2 | 6 . . | . . . |
| . 7 6 | . . 9 | . . . |
+-------+-------+-------+
| 3 6 . | . 9 4 | . 8 . |
| . . . | . . . | . . . |
| . 2 . | 7 5 . | . 4 3 |
+-------+-------+-------+
| . . . | 1 . . | 6 3 . |
| . . . | . . 3 | 8 . . |
| . 9 . | . 2 . | 1 . . |
+-------+-------+-------+
Back to top
View user's profile Send private message
Mogulmeister



Joined: 03 May 2007
Posts: 1151

PostPosted: Thu Oct 28, 2021 8:39 am    Post subject: Reply with quote

Here, I think is what I should have posted with the <34> pair at r23c7 still intact.

Code:

+--------------+---------------+--------------+
| 14  13  5    | 34  8    2    | 7   9   6    |
| 9   38  2    | 6   1347 157  | 34  15  58   |
| 48  7   6    | 345 134  9    | 34  125 258  |
+--------------+---------------+--------------+
| 3   6   7    | 2   9    4    | 5   8   1    |
| 5   4   9    | 38  13   18   | 2   6   7    |
| 18  2   18   | 7   5    6    | 9   4   3    |
+--------------+---------------+--------------+
| 2   58  48   | 1   47   57   | 6   3   9    |
| 7   15  14   | 9   6    3    | 8   25  245  |
| 6   9   3    | 458 2    58   | 1   7   45   |
+--------------+---------------+--------------+


Now the search for the single step can resume ?
Back to top
View user's profile Send private message
immpy



Joined: 06 May 2017
Posts: 570

PostPosted: Thu Oct 28, 2021 4:18 pm    Post subject: Reply with quote

Ahh, yes. That's what it should look like after basics. And one needs the two XY-Wings to solve using the VH skills.

cheers...immp
Back to top
View user's profile Send private message
immpy



Joined: 06 May 2017
Posts: 570

PostPosted: Thu Oct 28, 2021 5:51 pm    Post subject: Reply with quote

Would anyone like to discuss beer? I know a little bit about that. LOL

cheers...immp
Back to top
View user's profile Send private message
TomC



Joined: 30 Oct 2020
Posts: 349
Location: Wales

PostPosted: Thu Oct 28, 2021 6:24 pm    Post subject: Reply with quote

I've found over the years with sudoku that there are many ways to skin a grape

For those that are offended by this phrase I apologise and confirm that I am a great lover of the grape
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
Goto page 1, 2  Next
Page 1 of 2

 
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