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Daily Telegraph Fri, 12-Apr-2013 Diabolical

 
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Clement



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

PostPosted: Sat Apr 13, 2013 9:25 pm    Post subject: Daily Telegraph Fri, 12-Apr-2013 Diabolical Reply with quote

Code:

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

Play this puzzle online at the Daily Sudoku site
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Marty R.



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

PostPosted: Sun Apr 14, 2013 1:04 am    Post subject: Reply with quote

Code:

+------------+------------------+--------------+
| 1   8   3  | 2    4     79    | 59  57  6    |
| 69  29  47 | 3    6789  5     | 89  1   24   |
| 569 259 47 | 6789 16789 16789 | 3   78  24   |
+------------+------------------+--------------+
| 4   3   8  | 579  179   2     | 156 56  19   |
| 2   7   6  | 589  189   1389  | 4   358 1389 |
| 59  159 19 | 4    68    368   | 7   2   38   |
+------------+------------------+--------------+
| 38  69  5  | 679  2     4     | 168 368 1378 |
| 38  4   2  | 1    5     67    | 68  9   378  |
| 7   169 19 | 689  3     689   | 2   4   5    |
+------------+------------------+--------------+

Play this puzzle online at the Daily Sudoku site

I struggled with this one, unsuccessfully trying to solve it without chains.

XY-Chain (8=6)r8c7-(6=7)r8c6-(7=9)r1c6-(9=5)r1c7-(5=7)r1c8-(7=8)r3c8=>r2c7<>8

Code:

+-----------+-------------+-------------+
| 1  8   3  | 2   4   9   | 5   7  6    |
| 6  2   7  | 3   8   5   | 9   1  4    |
| 59 59  4  | 67  17  167 | 3   8  2    |
+-----------+-------------+-------------+
| 4  3   8  | 579 179 2   | 16  56 19   |
| 2  7   6  | 589 19  138 | 4   35 1389 |
| 59 159 19 | 4   6   38  | 7   2  38   |
+-----------+-------------+-------------+
| 38 69  5  | 679 2   4   | 168 36 1378 |
| 38 4   2  | 1   5   67  | 68  9  378  |
| 7  169 19 | 689 3   68  | 2   4  5    |
+-----------+-------------+-------------+

Play this puzzle online at the Daily Sudoku site

XY-Wing (36-8), pivot r7c8=>r8c1<>8
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arkietech



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

PostPosted: Sun Apr 14, 2013 2:55 am    Post subject: Reply with quote

I posted this puzzle on the players site. I will remove it
Code:
 *--------------------------------------------------------------------*
 | 1      8      3      | 2      4      79     | 59     57     6      |
 | 69     29     47     | 3      6789   5      | 89     1      24     |
 | 569    259    47     | 6789   16789  16789  | 3      78     24     |
 |----------------------+----------------------+----------------------|
 | 4      3      8      | 579    179    2      | 156    56     19     |
 | 2      7      6      | 589    189    1389   | 4      358    1389   |
 | 59     159    19     | 4      68     368    | 7      2      38     |
 |----------------------+----------------------+----------------------|
 | 38     69     5      | 679    2      4      | 168    368    1378   |
 | 38     4      2      | 1      5      67     | 68     9      378    |
 | 7      169    19     | 689    3      689    | 2      4      5      |
 *--------------------------------------------------------------------*
ur:
(7=1)38r78c19-(1r7c7=7r8c9)b9 => 7r8c9; ste
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Clement



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

PostPosted: Sun Apr 14, 2013 5:06 am    Post subject: Daily Telegraph Fri, 12-Apr-2013 Diabolical Reply with quote

I had the same solution as Marty.
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