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Puzzle for Sat 20th Sept

 
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hughwill



Joined: 05 Apr 2010
Posts: 424
Location: Birmingham UK
PostPosted: Fri Sep 19, 2014 4:48 pm    Post subject: Puzzle for Sat 20th Sept Reply with quote
Rated Very Hard

Code:

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

Play this puzzle online at the Daily Sudoku site

Enjoy

Hugh
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Clement



Joined: 24 Apr 2006
Posts: 1111
Location: Dar es Salaam Tanzania
PostPosted: Fri Sep 19, 2014 10:26 pm    Post subject: Sep 20 VH Reply with quote
Code:

+---------------+---------+------------+
| 156  3   156  | 7 8  9  | 4   2  56  |
| 59   8   4    | 2 3  6  | 79  57 1   |
| 269  7   26   | 1 5  4  | 3   8  69  |
+---------------+---------+------------+
| 4    9   3    | 5 26 7  | 268 1  28  |
| 7    26  8    | 4 26 1  | 5   9  3   |
| 1256 56  1256 | 3 9  8  | 26  4  7   |
+---------------+---------+------------+
| 25   4   7    | 6 1  25 | 89  3  89  |
| 8    256 256  | 9 47 3  | 1   *57 245 |
| 3    1   9    | 8 47 *25 | #27  6  24-5 |
+---------------+---------+------------+
XY-Wing 27-5 pivoted in r9c7; r9c9<>9; stte.
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abbyaaron



Joined: 20 Sep 2014
Posts: 1
PostPosted: Sat Sep 20, 2014 7:53 am    Post subject: Reply with quote
It's diffult.I'm stupid Laughing Laughing Laughing
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George Woods



Joined: 28 Mar 2006
Posts: 304
Location: Dorset UK
PostPosted: Wed Sep 24, 2014 1:05 pm    Post subject: another almost equivalent solution Reply with quote
r2c1 cannot be 5 because the consequent 5 in box 9 interacts with box 7 to put a 5 in c1clashing with the original postulaed 5 so this denies a 5 at r2c1 leading to a solution
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Clement



Joined: 24 Apr 2006
Posts: 1111
Location: Dar es Salaam Tanzania
PostPosted: Wed Sep 24, 2014 2:49 pm    Post subject: Puzzle for Sat 20th Sept Reply with quote
Sorry, a typographical error; r9c9<>5.
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