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Free Press August 29, 2014

 
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Clement



Joined: 24 Apr 2006
Posts: 1111
Location: Dar es Salaam Tanzania

PostPosted: Fri Aug 29, 2014 5:01 pm    Post subject: Free Press August 29, 2014 Reply with quote

Code:

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

Play this puzzle online at the Daily Sudoku site
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arkietech



Joined: 31 Jul 2008
Posts: 1834
Location: Northwest Arkansas USA

PostPosted: Fri Aug 29, 2014 5:37 pm    Post subject: Reply with quote

Code:
 
 *--------------------------------------------------------------------*
 | 6      345    8      | 2      345    45     | 19     19     7      |
 | 15     345    13     | 37     34579  459    | 2      6      8      |
 | 2      7      9      | 1      6      8      | 4      3      5      |
 |----------------------+----------------------+----------------------|
 | 4      6      7      | 9      2     c15     | 8      15     3      |
 | 8      59    b12     | 4     b15     3      | 6      7     b129    |
 | 15     359    123    | 6      8      7      | 159    1259   4      |
 |----------------------+----------------------+----------------------|
 | 39     1      4      | 5      39     2      | 7      8      6      |
 | 379    8      5      | 37     13479  6      | 139    1249   129    |
 | 379    2      6      | 8      13479  49-1   | 1359   1459  a19     |
 *--------------------------------------------------------------------*
(1=9)r9c9-(9=5)r5c359-(5=1)r4c6 => -1r9c6; ste
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Clement



Joined: 24 Apr 2006
Posts: 1111
Location: Dar es Salaam Tanzania

PostPosted: Sat Aug 30, 2014 9:51 am    Post subject: Free Press August 29, 2014 Reply with quote

Code:

+-------------+--------------+---------------+
| 6   345 8   | 2  345   45  | 19   19   7   |
| 15  345 13  | 37 34579 459 | 2    6    8   |
| 2   7   9   | 1  6     8   | 4    3    5   |
+-------------+--------------+---------------+
| 4   6   7   | 9  2     15  | 8    15   3   |
| 8   e59  12  | 4  d15    3   | 6    7    12-9 |
| 15  359 123 | 6  8     7   | 159  1259 4   |
+-------------+--------------+---------------+
| 39  1   4   | 5  39    2   | 7    8    6   |
| 379 8   5   | 37 c13479 6   | 139  1249 129 |
| 379 2   6   | 8  b13479 b149 | 1359 1459 a19  |
+-------------+--------------+---------------+
(9=1)r9c9-r9c56=r8c5-(1=5)r5c5-(5=9)r5c2 => -9r5c9; stte.
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dongrave



Joined: 06 Mar 2014
Posts: 568

PostPosted: Sat Aug 30, 2014 8:04 pm    Post subject: Reply with quote

And just for the record, here's the 'Van Hay'-type solution. It looks like all three solutions listed here are using the exact same principle.

r9c9 is 1 or 9; if it's 1 then r9c6<>1 so r4c6=1 so r5c5=5;
if it's 9 then r5c9<>9 so r5c2=9 so r5c5=5; therefore r5c5=5.

My biggest problem now is that I can't seem to find these unless I know the solution - but I don't know the solution unless I'm able to find these. ugh.
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