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Jun 14 VH

 
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dongrave



Joined: 06 Mar 2014
Posts: 363

PostPosted: Sun Jun 14, 2020 11:20 am    Post subject: Jun 14 VH Reply with quote

Code:
+------------+-----------+----------+
| 78 2    9  | 1  57 58  | 6  3  4  |
| 48 5    6  | 9  48 3   | 2  7  1  |
| 47 3    1  | 47 6  2   | 8  5  9  |
+------------+-----------+----------+
| 2  78   5  | 78 1  9   | 4  6  3  |
| 6  4789 47 | 3  57 458 | 1  89 2  |
| 1  489  3  | 6  2  48  | 7  89 5  |
+------------+-----------+----------+
| 9  47   2  | 48 3  6   | 5  1  78 |
| 3  6    47 | 5  48 1   | 9  2  78 |
| 5  1    8  | 2  9  7   | 3  4  6  |
+------------+-----------+----------+

The 47-8 XY-Wing with pivot at r7c2 (-8r4c4) solves it and so does the 48-7 XY-Wing with pivot at r7c4 (-7r4c2).
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