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Clement
Joined: 24 Apr 2006
Posts: 1111
Location: Dar es Salaam Tanzania
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 Posted: Wed Aug 29, 2012 10:46 pm Post subject: Aug 30 VH |
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| Code: |
+-----------+----------+----------+
| 7 8 5 | 9 6 3 | 2 1 4 |
| 4 3 2 | 7 1 8 | 5 9 6 |
| 1 9 6 | 2 5 4 | 78 78 3 |
+-----------+----------+----------+
| 5 2 3 | 1 9 6 | 48 48 7 |
| 6 47 478 | 5 48 2 | 1 3 9 |
| 9 1 48 | 38 348 7 | 6 5 2 |
+-----------+----------+----------+
| 3 467 9 | 68 78 5 | 47 2 1 |
| 8 67 1 | 4 2 9 | 3 67 5 |
| 2 5 47 | 36 37 1 | 9 467 8 |
+-----------+----------+----------+
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W-Wing 47 in BOX 79 with SL 7 in Col 5; r9c8<>4 solves it in one step.
Also two xy-wings: XY-Wing 47 48 78 pivoted in r5c5; r7c2<>7 which opens another XY-Wing 67 46 47 with pivot in r7c2; r8c8<>7. |
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