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 

Jul 04 VH

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



Joined: 05 Feb 2017
Posts: 942
Location: Rimini, Italy
PostPosted: Sun Jul 04, 2021 12:33 pm    Post subject: Jul 04 VH Reply with quote
Hi everyone,

Code:

+--------------+--------------+----------------+
| 4    179 125 | 259  29  6   | 3    578   578 |
| 23   56  8   | 7    1   23  | 56   4     9   |
| 3569 79  35  | 3459 8   345 | 2    567   1   |
+--------------+--------------+----------------+
| 359  2   135 | 159  679 157 | 8    13567 4   |
| 35   14  6   | 125  247 8   | 9    1357  57  |
| 8    149 7   | 1359 469 135 | 156  2     56  |
+--------------+--------------+----------------+
| 1    3   9   | 246  5   247 | 467  68    268 |
| 7    8   25  | 1246 3   9   | 1456 156   256 |
| 256  56  4   | 8    27  127 | 157  1579  3   |
+--------------+--------------+----------------+

Play this puzzle online at the Daily Sudoku site

first step
XY-Wing 2,3,5 in r2c1,r38c3 and -2 in r1c3,r9c1

Code:

+-----------+---------+----------+
| 4   17 15 | 29 29 6 | 3  57 8  |
| 2   56 8  | 7  1  3 | 56 4  9  |
| 69  79 3  | 4  8  5 | 2  67 1  |
+-----------+---------+----------+
| 359 2  15 | 59 69 7 | 8  13 4  |
| 35  14 6  | 25 24 8 | 9  13 7  |
| 8   49 7  | 3  49 1 | 56 2  56 |
+-----------+---------+----------+
| 1   3  9  | 6  5  4 | 7  8  2  |
| 7   8  2  | 1  3  9 | 4  56 56 |
| 56  56 4  | 8  7  2 | 1  9  3  |
+-----------+---------+----------+

Play this puzzle online at the Daily Sudoku site

second step
XY-Wing 1,3,5 in r4c38,r5c1 and -3 in r4c1,r5c8

Ciao Gianni
Back to top
View user's profile Send private message
TomC



Joined: 30 Oct 2020
Posts: 358
Location: Wales
PostPosted: Sun Jul 04, 2021 12:50 pm    Post subject: Reply with quote
Nice 2 step puzzle

My second step was a very similar XY 135 giving -1 in r4c8 and r5c2


or you could have -2 in r5c4 as then r5c5=4, r5c2=1, r4c3=5, r4c4=9 and r1c4 would also be 2
Back to top
View user's profile Send private message
Mogulmeister



Joined: 03 May 2007
Posts: 1151
PostPosted: Sun Jul 04, 2021 4:53 pm    Post subject: Reply with quote
Either the 4 at r5c2 is true or the 4 at r6c5 is true. r4c34 are the link.

so r5c4<>4
Back to top
View user's profile Send private message
TomC



Joined: 30 Oct 2020
Posts: 358
Location: Wales
PostPosted: Sun Jul 04, 2021 5:33 pm    Post subject: Reply with quote
Another way to solve is to stay in box 4 c12 and use r5c8 (13)

then r4c1 <>9 as this would either give two 9's in box 4 or no 3's in box 4
Back to top
View user's profile Send private message
Mogulmeister



Joined: 03 May 2007
Posts: 1151
PostPosted: Mon Jul 05, 2021 9:09 am    Post subject: Reply with quote
Mogulmeister wrote:
Either the 4 at r5c2 is true or the 4 at r6c5 is true. r4c34 are the link.

so r5c4<>4


...and with a small shift from the same path above, the 9 at r6c2 is true or the 9 at r4c4 is true so r6c5<>9
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