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 

Como resolvo este?

 
Post new topic   Reply to topic    dailysudoku.com Forum Index -> Solving techniques, and terminology
View previous topic :: View next topic  
Author Message
kiutrej



Joined: 20 May 2012
Posts: 2

PostPosted: Sun May 20, 2012 1:39 pm    Post subject: Como resolvo este? Reply with quote

I'm blocked in this one.. so i ask for a tip (red) but i don't understand the logic. Can you explain it to me...

Code:

+-------+-------+-------+
| 8 7 2 | . 5 1 | 4 . 3 |
| . 6 . | . 2 .  | . 7 1 |
| 9 1 . | 3 7 . | 2 [color=red]6[/color] . |
+-------+-------+-------+
| 7 2 . | . 3 5 | . 4 . |
| . 8 . | . 4 7 | 3 . 2 |
| . 3 . | 2 9 . | . 1 7 |
+-------+-------+-------+
| 2 5 7 | 4 8 9 | 1 3 6 |
| . . . | 7 1 2 | . 8 . |
| 1 . 8 | 5 6 3 | 7 2 . |
+-------+-------+-------+

Play this puzzle online at the Daily Sudoku site[/img]
Back to top
View user's profile Send private message
Marty R.



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

PostPosted: Sun May 20, 2012 3:21 pm    Post subject: Reply with quote

Code:

+-------------+-----------+-------------+
| 8   7  2    | 69  5 1   | 4   69  3   |
| 345 6  345  | 89  2 48  | 589 7   1   |
| 9   1  45   | 3   7 468 | 2   56  58  |
+-------------+-----------+-------------+
| 7   2  169  | 168 3 5   | 689 4   89  |
| 56  8  1569 | 16  4 7   | 3   569 2   |
| 456 3  456  | 2   9 68  | 568 1   7   |
+-------------+-----------+-------------+
| 2   5  7    | 4   8 9   | 1   3   6   |
| 346 49 3469 | 7   1 2   | 59  8   459 |
| 1   49 8    | 5   6 3   | 7   2   49  |
+-------------+-----------+-------------+

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



Joined: 19 Sep 2005
Posts: 3355
Location: near Detroit, Michigan, USA

PostPosted: Sun May 20, 2012 3:26 pm    Post subject: Reply with quote

Here is your puzzle as posted, with all possibilities:
Code:
+----------------+----------------+----------------+
| 8    7    2    | 69   5    1    | 4    69   3    |
| 345  6    345  | 89   2    48   | 589  7    1    |
| 9    1    45   | 3    7    468  | 2    56   58   |
+----------------+----------------+----------------+
| 7    2    169  | 168  3    5    | 689  4    89   |
| 56   8    1569 | 16   4    7    | 3    569  2    |
| 456  3    456  | 2    9    68   | 568  1    7    |
+----------------+----------------+----------------+
| 2    5    7    | 4    8    9    | 1    3    6    |
| 346  49   3469 | 7    1    2    | 59   8    459  |
| 1    49   8    | 5    6    3    | 7    2    49   |
+----------------+----------------+----------------+
After simplifying:
Code:
+-------------+-------------+-------------+
| 8   7   2   | 69  5   1   | 4   69  3   |
| 345 6   345 | 89  2   48  | 589 7   1   |
| 9   1   45  | 3   7   468 | 2  -56 *58  |
+-------------+-------------+-------------+
| 7   2   19  | 168 3   5   | 689 4  #89  |
| 56  8   19  | 16  4   7   | 3  *59  2   |
| 456 3   456 | 2   9   68  | 568 1   7   |
+-------------+-------------+-------------+
| 2   5   7   | 4   8   9   | 1   3   6   |
| 36  49  36  | 7   1   2   | 59  8   459 |
| 1   49  8   | 5   6   3   | 7   2   49  |
+-------------+-------------+-------------+
The pattern marked is an XY-Wing which eliminates 5 in R2C8.

I hope that helps.

Keith
Back to top
View user's profile Send private message
kiutrej



Joined: 20 May 2012
Posts: 2

PostPosted: Sun May 20, 2012 7:53 pm    Post subject: Reply with quote

Thanks Wink
Back to top
View user's profile Send private message
Display posts from previous:   
Post new topic   Reply to topic    dailysudoku.com Forum Index -> Solving techniques, and terminology 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