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Daily Telegraph Diabolical Fri, 22-Feb-2013

 
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Clement



Joined: 24 Apr 2006
Posts: 1113
Location: Dar es Salaam Tanzania
PostPosted: Sun Feb 24, 2013 3:26 pm    Post subject: Daily Telegraph Diabolical Fri, 22-Feb-2013 Reply with quote
Code:

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

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: Sun Feb 24, 2013 4:31 pm    Post subject: Reply with quote
Code:
 
 *-----------------------------------------------------------*
 | 9     3478  2     | 378   6     37    | 15    14    3578  |
 | 6     3578  57    | 378   4     1     | 2     78    9     |
 | 34    3478  1     | 9     5     2     | 678   46    378   |
 |-------------------+-------------------+-------------------|
 | 2     9     4     | 5     78    6     | 3     78    1     |
 | 7     1     8     | 2     3     9     | 4     5     6     |
 | 5     6     3     | 1     78    4     | 78    9     2     |
 |-------------------+-------------------+-------------------|
 | 1     47    9     | 46    2     5     | 678   3     78    |
 | 8     25    6     | 37    9     37    | 15    12    4     |
 | 34    234   57    | 46    1     8     | 9     26    57    |
 *-----------------------------------------------------------*
w-wing (6=4)r3c9-r3c1=r9c1-(4=6) => -6r9c8; ste
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Marty R.



Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA
PostPosted: Sun Feb 24, 2013 4:55 pm    Post subject: Reply with quote
Code:
 *-----------------------------------------------------------*
 | 9     3478  2     | 378   6     37    | 15    14    3578  |
 | 6     3578  57    | 378   4     1     | 2     78    9     |
 | 34    3478  1     | 9     5     2     | 678   46    378   |
 |-------------------+-------------------+-------------------|
 | 2     9     4     | 5     78    6     | 3     78    1     |
 | 7     1     8     | 2     3     9     | 4     5     6     |
 | 5     6     3     | 1     78    4     | 78    9     2     |
 |-------------------+-------------------+-------------------|
 | 1     47    9     | 46    2     5     | 678   3     78    |
 | 8     25    6     | 37    9     37    | 15    12    4     |
 | 34    234   57    | 46    1     8     | 9     26    57    |
 *-----------------------------------------------------------*


Chain, r7c2=7 proves 4 in r1c8.

(4=7)r7c2-(78=6)r7c97-r3c7=r3c8-(612=4)r891c8=>r1c2<>4
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