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 

Extreme 071620

 
Post new topic   Reply to topic    dailysudoku.com Forum Index -> Other puzzles
View previous topic :: View next topic  
Author Message
immpy



Joined: 06 May 2017
Posts: 571
PostPosted: Fri Jul 17, 2020 1:08 am    Post subject: Extreme 071620 Reply with quote
Hello all, many paths to use. Enjoy the puzzle...

Code:

+-------+-------+-------+
| 8 . . | . . 5 | . 1 . |
| . . . | 9 1 . | 7 . 8 |
| . 7 . | . . . | . . . |
+-------+-------+-------+
| . 8 . | 3 4 . | . 9 . |
| 3 . 9 | . 6 . | . . . |
| . 1 . | 5 7 . | . 3 . |
+-------+-------+-------+
| . 4 . | . . . | . . . |
| . . . | 1 9 . | 4 . 2 |
| 9 . . | . . 3 | . 5 . |
+-------+-------+-------+

Play this puzzle online at the Daily Sudoku site

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



Joined: 05 Feb 2017
Posts: 940
Location: Rimini, Italy
PostPosted: Fri Jul 17, 2020 7:38 am    Post subject: Reply with quote
Hi everyone,

AIC in r1c7 (3,6):
if r1c7=3 r9c7=6 r9c2=2 r9c3=7 r4c3=6 and no 6 in r1
so r1c7=6

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



Joined: 24 Apr 2006
Posts: 1111
Location: Dar es Salaam Tanzania
PostPosted: Fri Jul 17, 2020 10:19 am    Post subject: Extreme 071620 Reply with quote
Code:

+-----------------------+----------------+---------------------+
| 8       9      e46    | 7     2    5   |d36       1     34   |
| 2456    236     23456 | 9     1    46  | 7        246   8    |
| 1246    7       1246  | 68    3    468 |c59       246  b59   |
+-----------------------+----------------+---------------------+
| 67      8      f67    | 3     4    12  |c125      9    a15   |
| 3       5       9     | 28    6    128 |c12       47    47   |
| 24      1       24    | 5     7    9   | 8        3     6    |
+-----------------------+----------------+---------------------+
| 167     4       1678  | 26    5    267 | 1369     678   1379 |
| 567     36      35678 | 1     9    67  | 4        678   2    |
| 9       26     g1267  | 4     8    3   |c16       5    h7-1  |
+-----------------------+----------------+---------------------+

(1=5)r4c9 - r3c9 = (5126)r3459c7 - (6)r1c7 = r1c3 - (6=7)r4c3 - r9c3 = (7)r9c9 => - 1r9c9; stte
Back to top
View user's profile Send private message AIM Address
dongrave



Joined: 06 Mar 2014
Posts: 568
PostPosted: Fri Jul 17, 2020 2:51 pm    Post subject: Reply with quote
There are a couple hidden pairs hiding in Clement's grid (i.e. 39 in row 7 and 35 in column 3) which gets you to the following grid. (Clement's solution still works for this grid.)

Code:

+--------------+----------+------------+
| 8    9   46  | 7  2 5   | 36  1   34 |
| 2456 236 35  | 9  1 46  | 7   246 8  |
| 246  7   1   | 68 3 468 | 59  246 59 |
+--------------+----------+------------+
| 67   8   67  | 3  4 12  | 125 9   15 |
| 3    5   9   | 28 6 128 | 12  47  47 |
| 24   1   24  | 5  7 9   | 8   3   6  |
+--------------+----------+------------+
| 1    4   8   | 26 5 267 | 39  67  39 |
| 567  36  35  | 1  9 67  | 4   8   2  |
| 9    26  267 | 4  8 3   | 16  5   17 |
+--------------+----------+------------+


Then I saw that the 246 XYZ Wing with pivot at r3c1 didn't get me anywhere so I instead used practically the same chain that Gianni used to solve it: 6r1c7=(6-1)r9c7=(1-7)r9c9=r9c3-(7=6)r4c3 => r1c3<>6.
Back to top
View user's profile Send private message
Display posts from previous:   
Post new topic   Reply to topic    dailysudoku.com Forum Index -> Other 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