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Daily Sudoku for 8/4/2017-Diabolical

 
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Clement



Joined: 24 Apr 2006
Posts: 1111
Location: Dar es Salaam Tanzania
PostPosted: Mon Apr 10, 2017 2:59 pm    Post subject: Daily Sudoku for 8/4/2017-Diabolical Reply with quote
Code:

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

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: Mon Apr 10, 2017 7:23 pm    Post subject: Reply with quote
Code:
+--------------------------+--------------------------+--------------------------+
| 3       5       26       | 168     16      9        | 12478   1248    78       |
| 4       26      9        | 168     3       7        | 128     128     5        |
| 1       8       7        | 4       2       5        | 6       9       3        |
+--------------------------+--------------------------+--------------------------+
| 2       36      5        | 7       8       1        | 9       36      4        |
| 89      367     1        | 269     46      24       | 5       2368    78       |
| 89      467     46       | 269     5       3        | 278     268     1        |
+--------------------------+--------------------------+--------------------------+
| 7       24      8        | 12      14      6        | 3       5       9        |
| 6       9       3        | 5       7       48       | 148     148     2        |
| 5       1       24       | 3       9       248      | 48      7       6        |
+--------------------------+--------------------------+--------------------------+


Surprisingly short XY-Chain

(2=4)r7c2-(4=1)r7c5-(1=6)r1c5-(6=2)r1c3=> -2 r2c2,r9c3
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ZeroAssoluto



Joined: 05 Feb 2017
Posts: 942
Location: Rimini, Italy
PostPosted: Tue Apr 11, 2017 8:44 am    Post subject: Reply with quote
Hi everyone,
another possible XY-Chain for number 6:

r2c2 - r7c2 - r7c5 - r1c5 - r1c3 - r9c3 - r6c3 and -6 in r1c3, r456c2.

Ciao Gianni.
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Clement



Joined: 24 Apr 2006
Posts: 1111
Location: Dar es Salaam Tanzania
PostPosted: Wed Apr 12, 2017 8:50 am    Post subject: Reply with quote
Another one:
(2)r9c6 = r9c3 - (2=6)r1c3 - r1c5 = (6-4)r5c5 = (4)r5c6 => -2 r5c6; stte
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