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Dec 23 VH

 
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ZeroAssoluto



Joined: 05 Feb 2017
Posts: 378
Location: Rimini, Italy

PostPosted: Sun Dec 23, 2018 8:48 am    Post subject: Dec 23 VH Reply with quote

Hi everyone,

Code:

+--------------+------------------+---------------+
| 1    568 567 | 23789 4     2379 | 279 567 25789 |
| 58   9   2   | 6     78    1    | 3   4   578   |
| 3    4   67  | 289   289   5    | 1   67  289   |
+--------------+------------------+---------------+
| 5689 7   56  | 1     23689 239  | 29  35  4     |
| 89   38  4   | 23789 5     2379 | 6   1   2379  |
| 2    356 1   | 379   3679  4    | 79  8   3579  |
+--------------+------------------+---------------+
| 56   56  9   | 4     237   237  | 8   37  1     |
| 4    1   8   | 379   379   6    | 5   2   37    |
| 7    2   3   | 5     1     8    | 4   9   6     |
+--------------+------------------+---------------+

Play this puzzle online at the Daily Sudoku site

first step
W-Wing 5,6 in r4c3,r7c2 SL with number 6 in r47c1 and -5 in r6c2

after basic

Code:

+-------+----------+----------+
| 1 8 6 | 3  4  79 | 27 5 279 |
| 5 9 2 | 6  78 1  | 3  4 78  |
| 3 4 7 | 2  89 5  | 1  6 89  |
+-------+----------+----------+
| 8 7 5 | 1  6  29 | 29 3 4   |
| 9 3 4 | 8  5  27 | 6  1 27  |
| 2 6 1 | 79 3  4  | 79 8 5   |
+-------+----------+----------+
| 6 5 9 | 4  2  3  | 8  7 1   |
| 4 1 8 | 79 79 6  | 5  2 3   |
| 7 2 3 | 5  1  8  | 4  9 6   |
+-------+----------+----------+

Play this puzzle online at the Daily Sudoku site

BUG+1 r1c9=7

Ciao Gianni
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RobertRattley



Joined: 24 Jun 2007
Posts: 104
Location: Australia

PostPosted: Wed Dec 26, 2018 2:51 pm    Post subject: Reply with quote

Using only x- and xy- wings:
x-wing 5
xy wing 568 and later
xy wing 279
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