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roaa
Joined: 18 Apr 2009
Posts: 112
Location: Sweden
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 Posted: Sun Nov 15, 2015 7:59 am Post subject: Nov 15 VH |
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| One stepper: XY-wing 459, pivot r9c2, gives r2c2 = 4. |
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dongrave
Joined: 06 Mar 2014
Posts: 568
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| Posted: Sun Nov 15, 2015 2:11 pm Post subject: |
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| Code: |
+-------------+-----------+------------+
| 8 3 45 | 2 6 7 | 9 1 45 |
| 2 45 7 | 9 18 18 | 45 6 3 |
| 9 6 1 | 3 4 5 | 2 8 7 |
+-------------+-----------+------------+
| 4 2 6 | 5 789 89 | 78 3 1 |
| 5 78 3 | 1 278 4 | 6 27 9 |
| 1 789 89 | 6 278 3 | 578 4 25 |
+-------------+-----------+------------+
| 7 59 2 | 4 3 6 | 1 59 8 |
| 6 4589 4589 | 7 19 129 | 3 259 24 |
| 3 1 49 | 8 5 29 | 47 279 6 |
+-------------+-----------+------------+
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Of course the pivot of roaa's 49-5 XY-Wing is actually in r9c3. There's also the 59-4 XY-Wing with pivot at r7c2 so r1c3<>4 which solves it. |
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