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dongrave
Joined: 06 Mar 2014
Posts: 568
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 Posted: Sun Jun 14, 2020 11:20 am Post subject: Jun 14 VH |
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| 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 |
+------------+-----------+----------+
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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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