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 

Unfair 081820

 
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: 570

PostPosted: Tue Aug 18, 2020 7:10 pm    Post subject: Unfair 081820 Reply with quote

Hello all, enjoy the puzzle...

Code:

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

Play this puzzle online at the Daily Sudoku site

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



Joined: 06 Mar 2014
Posts: 563

PostPosted: Wed Aug 19, 2020 2:07 pm    Post subject: Reply with quote

Code:

+-------------+--------------+---------------+
| 9   1    7  | 2    5  346  | 36   346  8   |
| 5   36   2  | 3467 8  346  | 1367 9    14  |
| 36  8    4  | 367  9  1    | 367  5    2   |
+-------------+--------------+---------------+
| 7   245  15 | 35   6  358  | 9    248  14  |
| 8   9    6  | 1    4  2    | 5    7    3   |
| 12  245  3  | 59   7  589  | 128  248  6   |
+-------------+--------------+---------------+
| 136 7    15 | 8    2  56   | 4    36   9   |
| 236 2356 89 | 4569 1  4569 | 2368 2368 7   |
| 4   26   89 | 69   3  7    | 268  1    5   |
+-------------+--------------+---------------+

Is the following Eureka notation right?  I modeled it after a recent post of Clement's that did something similar. 
I'm trying to represent the following: if r4c3 is not a 1 then it's a 5 and r4c4 is a 3
and then later on that cell r3c4 = 7 because of the -3 from r4c4 and the -6 from r3c1. 
Thanks ahead of time for any feedback, Don.

(1=5,3)r4c3,r4c4-(5=24)r46c2-(2=6)r9c2-r2c2=r3c1-(36=7)r3c4-(7=36)r13c7-(36=4)r1c8-(4=1)r2c9 => r4c9<>1; stte.

How is the person reading this supposed to know that the 3 mentioned so much earlier is being referenced for the step '-(36=7)r3c4'?' 
Maybe something like the following would be clearer?

(1=5)r4c3[-(5=3)r4c4]
         [-(5=24)r46c2-(2=6)r9c2-r2c2=r3c1]
          -(36=7)r3c4-(7=36)r13c7-(36=4)r1c8-(4=1)r2c9 => r4c9<>1; stte.

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



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

PostPosted: Thu Aug 20, 2020 11:39 am    Post subject: Reply with quote

dongrave wrote:
Code:


Is the following Eureka notation right?  I modeled it after a recent post of Clement's that did something similar. 
I'm trying to represent the following: if r4c3 is not a 1 then it's a 5 and r4c4 is a 3
and then later on that cell r3c4 = 7 because of the -3 from r4c4 and the -6 from r3c1. 
Thanks ahead of time for any feedback, Don.

(1=5,3)r4c3,r4c4-(5=24)r46c2-(2=6)r9c2-r2c2=r3c1-(36=7)r3c4-(7=36)r13c7-(36=4)r1c8-(4=1)r2c9 => r4c9<>1; stte.

How is the person reading this supposed to know that the 3 mentioned so much earlier is being referenced for the step '-(36=7)r3c4'?' 
Maybe something like the following would be clearer?

(1=5)r4c3[-(5=3)r4c4]
         [-(5=24)r46c2-(2=6)r9c2-r2c2=r3c1]
          -(36=7)r3c4-(7=36)r13c7-(36=4)r1c8-(4=1)r2c9 => r4c9<>1; stte.

Good solution Dongrave, The chain is right as far as I am concerned except for minor modifications. The second term should look like this (5=2|4)r46c2 to show that they appear in pairs and (7=3|6)r13c7 for the same reason.
Up to now the Eureka Notation is not exhaustive to carter for complex chains like this. New symbols are still being suggested/discussed in some forums. When a candidate is needed for reference later it can be marked with a symbol say * or any in the chain or grid. In your chain you could have marked it like (1=5,3*)r4c3, r4c4, then refer it (3*6=7)r3c4.
Back to top
View user's profile Send private message AIM Address
dongrave



Joined: 06 Mar 2014
Posts: 563

PostPosted: Thu Aug 20, 2020 12:00 pm    Post subject: Reply with quote

Ah! I see! Thanks for your help Clement! It's much appreciated! Don.
Back to top
View user's profile Send private message
Clement



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

PostPosted: Thu Aug 20, 2020 4:31 pm    Post subject: Unfair 081820 Reply with quote

Code:

+--------------------+-------------------+----------------------+
| 9      1       7   | 2       5    346  |h36       i346     8  |
| 5      36      2   | 3467    8    346  |h1367      9      j14 |
| 36     8       4   | 367     9    1    |h367       5       2  |
+--------------------+-------------------+----------------------+
| 7     m245   ld15  | 35      6    358  | 9         248     k14|
| 8      9       6   | 1       4    2    | 5         7        3 |
|c12    m245     3   | 59      7    589  | 128       248      6 |
+--------------------+-------------------+----------------------+
| 136    7      e15  | 8       2   e56   | 4         36       9 |
|b236    2356    589 | 4569    1    4569 | 2368      2368     7 |
| 4    ba6*-2    89  |f6*9     3    7    |g268       1        5 |
+--------------------+-------------------+----------------------+

Just for fun when things get hot
2r9c2 - [(2)r8c1-(6*)r9c2] = (2-1)r6c1 = r4c3 - (1=56)r7c36 - (6*)r9c4 = (6)r9c7 - 123c7 = (6-4)r1c8 = (4-1)r2c9 = r4c9 - (1=5)r4c3 - (5=2|4)r46c2 => - 2r9c2; stte
Back to top
View user's profile Send private message AIM Address
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