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Dec 21 H

 
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tom



Joined: 05 Jan 2010
Posts: 1
PostPosted: Tue Jan 12, 2010 7:23 am    Post subject: Dec 21 H Reply with quote
Code:

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

Play this puzzle online at the Daily Sudoku site

The hint at this point says a 6 goes in r3,c9. Please tell me with which method you determine its 6.
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wapati



Joined: 10 Jun 2008
Posts: 472
Location: Brampton, Ontario, Canada.
PostPosted: Tue Jan 12, 2010 7:38 am    Post subject: Reply with quote
Not sure where you were.

A triple in c 8 made the only 5s in box3.

r3c9 cannot be 5. Sorry if I am too terse.
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Marty R.



Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA
PostPosted: Tue Jan 12, 2010 4:59 pm    Post subject: Reply with quote
Hi Tom, welcome to the forum. I reached this position after a 125 triple in column 8.

Code:

+--------------+------------------+-------------+
| 167 2    158 | 34568 45678 3578 | 9  15  1456 |
| 167 178  158 | 4568  9     578  | 24 125 3    |
| 4   9    3   | 2     56    1    | 8  7   56   |
+--------------+------------------+-------------+
| 9   4    6   | 7     258   2358 | 1  38  58   |
| 5   1378 18  | 46    46    38   | 37 9   2    |
| 37  378  2   | 358   1     9    | 6  4   578  |
+--------------+------------------+-------------+
| 23  6    7   | 1     28    4    | 5  38  9    |
| 8   5    4   | 9     3     6    | 27 12  17   |
| 123 13   9   | 58    2578  2578 | 34 6   48   |
+--------------+------------------+-------------+

Play this puzzle online at the Daily Sudoku site

The 5 in box 6 must be in column 9, thus no other boxes can have a 5 in column 9.
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