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Feb 13 VH

 
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ZeroAssoluto



Joined: 05 Feb 2017
Posts: 942
Location: Rimini, Italy
PostPosted: Mon Feb 13, 2023 10:26 am    Post subject: Feb 13 VH Reply with quote
Hi everyone,

Code:

+------------+---------+-------------+
| 16 9    36 | 34 8  2 | 15 157 1457 |
| 7  2    4  | 1  9  5 | 6  8   3    |
| 8  13   5  | 34 6  7 | 9  2   14   |
+------------+---------+-------------+
| 9  67   1  | 5  3  8 | 4  67  2    |
| 45 3457 37 | 6  2  9 | 8  157 157  |
| 2  568  68 | 7  4  1 | 3  56  9    |
+------------+---------+-------------+
| 15 78   78 | 9  15 4 | 2  3   6    |
| 3  15   9  | 2  15 6 | 7  4   8    |
| 46 46   2  | 8  7  3 | 15 9   15   |
+------------+---------+-------------+

Play this puzzle online at the Daily Sudoku site

Quote:
XY-Wing
3,6,7 in r15c3,r4c2 and -6 in r6c3
6,7,8 in r4c2,r67c3 and -7 in r5c3,r7c2
6,7,8 in r47c2,r6c3 and -8 in r6c2,r7c3


Ciao Gianni
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TomC



Joined: 30 Oct 2020
Posts: 358
Location: Wales
PostPosted: Mon Feb 13, 2023 1:30 pm    Post subject: Another way Reply with quote
Remove <3> from r5c2 to solve

Code:

+----------------+---------+-------------+
| b16   9     36 | 34 8  2 | 15 157 1457 |
|  7    2     4  | 1  9  5 | 6  8   3    |
|  8   a13    5  | 34 6  7 | 9  2   14   |
+----------------+---------+-------------+
|  9    67    1  | 5  3  8 | 4  67  2    |
|  45  x3457  37 | 6  2  9 | 8  157 157  |
|  2    568   68 | 7  4  1 | 3  56  9    |
+----------------+---------+-------------+
|  15   78    78 | 9  15 4 | 2  3   6    |
|  3    15    9  | 2  15 6 | 7  4   8    |
| c46   46    2  | 8  7  3 | 15 9   15   |
+----------------+---------+-------------+

Quote:
If x=3, a=1, b=6, c=4 leads to no <4> in column 2

.
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