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au tough(vh) June 21, 2012

 
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arkietech



Joined: 31 Jul 2008
Posts: 1727
Location: Northwest Arkansas USA

PostPosted: Fri Jun 22, 2012 6:36 am    Post subject: au tough(vh) June 21, 2012 Reply with quote

Code:

 *-----------*
 |.5.|..2|1..|
 |3..|..9|...|
 |1..|...|.79|
 |---+---+---|
 |...|..1|8.7|
 |...|.6.|...|
 |6.4|3..|...|
 |---+---+---|
 |93.|...|..2|
 |...|7..|..5|
 |..1|8..|.3.|
 *-----------*
 

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Marty R.



Joined: 12 Feb 2006
Posts: 5164
Location: Rochester, NY, USA

PostPosted: Fri Jun 22, 2012 7:49 pm    Post subject: Reply with quote

Code:

+-------------+----------+----------+
| 78  5   9   | 6 378 2  | 1   4 38 |
| 3   4   678 | 1 78  9  | 5   2 68 |
| 1   268 268 | 5 38  4  | 36  7 9  |
+-------------+----------+----------+
| 5   9   3   | 2 4   1  | 8   6 7  |
| 278 1   278 | 9 6   78 | 34  5 34 |
| 6   78  4   | 3 5   78 | 2   9 1  |
+-------------+----------+----------+
| 9   3   5   | 4 1   6  | 7   8 2  |
| 248 268 268 | 7 29  3  | 469 1 5  |
| 247 267 1   | 8 29  5  | 469 3 46 |
+-------------+----------+----------+

Play this puzzle online at the Daily Sudoku site

XY-Wing (368), pivot r3c7; r2c5<>8

-or-

W-Wing (78), boxes 12, SL 8 in r3; r1c5, r2c3<>7

-or-

Various other solutions, I suspect
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