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Sep 20 VH

 
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ZeroAssoluto



Joined: 05 Feb 2017
Posts: 941
Location: Rimini, Italy
PostPosted: Tue Sep 20, 2022 8:45 am    Post subject: Sep 20 VH Reply with quote
Hi everyone,

Code:

+--------------+----------+-------------+
| 6   34   37  | 47 2   1 | 8   9    5  |
| 258 458  57  | 3  456 9 | 1   267  26 |
| 125 15   9   | 67 56  8 | 267 3    4  |
+--------------+----------+-------------+
| 59  2    4   | 8  79  6 | 3   57   1  |
| 7   58   56  | 14 14  3 | 256 2568 9  |
| 189 1389 136 | 5  79  2 | 67  4    68 |
+--------------+----------+-------------+
| 3   6    15  | 9  18  7 | 4   1258 28 |
| 4   7    2   | 16 168 5 | 9   18   3  |
| 159 159  8   | 2  3   4 | 56  156  7  |
+--------------+----------+-------------+

Play this puzzle online at the Daily Sudoku site

Quote:
XY-Wing 5,6,7 in r4c8,r69c7 and -5 in r5c7,r79c8
or
W-Wing 5,7 in r2c3,r4c8 SL with number 5 in r7c38 and -7 in r2c8


Ciao Gianni
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TomC



Joined: 30 Oct 2020
Posts: 358
Location: Wales
PostPosted: Tue Sep 20, 2022 2:45 pm    Post subject: Another way to solve this Reply with quote
Remove <2> from r3c7 to solve

Code:

+-----------------+----------+---------------+
|  6    34    37  | 47 2   1 |  8   9     5  |
|  258  458  d57  | 3  456 9 |  1   267   26 |
| b125 c15    9   | 67 56  8 | a267 3     4  |
+-----------------+----------+---------------+
|  59   2     4   | 8  79  6 |  3   57    1  |
|  7    58    56  | 14 14  3 |  256 2568  9  |
|  189  1389  136 | 5  79  2 |  67  4     68 |
+-----------------+----------+---------------+
|  3    6     15  | 9  18  7 |  4   1258  28 |
|  4    7     2   | 16 168 5 |  9   18    3  |
|  159  159   8   | 2  3   4 |  56  156   7  |
+-----------------+----------+---------------+


If a=2, bc=<15>, d=7 leads to a=7 (or no <7> possible in box 3)
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