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Oct 24 VH

 
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Clement



Joined: 24 Apr 2006
Posts: 1111
Location: Dar es Salaam Tanzania
PostPosted: Tue Oct 23, 2012 11:28 pm    Post subject: Oct 24 VH Reply with quote
Code after Basics
Code:

+-------------+------------+--------------+
| 356 38  568 | 1  9   4   | 56  2   7    |
| 7   2   4   | 5  68  68  | 1   3   9    |
| 1   9   56  | 7  2   3   | 8   4   56   |
+-------------+------------+--------------+
| 8   6   3   | 2  4   157 | 9   17  15   |
| 2   45  7   | 9  16  156 | 3   18  1458 |
| 9   45  1   | 8  3   57  | 457 6   2    |
+-------------+------------+--------------+
| 36  378 9   | 46 178 18  | 2   5   148  |
| 56  1   56-8 | 46 *78  2   | 47  9   3    |
| 4   *78  2   | 3  5   9   | 67  178 168  |
+-------------+------------+--------------+
W-Wing 78 in BOX 78 with SL 7 in row 7; r8c3<>8 solves it.
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Marty R.



Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA
PostPosted: Wed Oct 24, 2012 1:40 am    Post subject: Re: Oct 24 VH Reply with quote
Clement wrote:
Code after Basics
Code:

+-------------+------------+--------------+
| 356 38  568 | 1  9   4   | 56  2   7    |
| 7   2   4   | 5  68  68  | 1   3   9    |
| 1   9   56  | 7  2   3   | 8   4   56   |
+-------------+------------+--------------+
| 8   6   3   | 2  4   157 | 9   17  15   |
| 2   45  7   | 9  16  156 | 3   18  1458 |
| 9   45  1   | 8  3   57  | 457 6   2    |
+-------------+------------+--------------+
| 36  378 9   | 46 178 18  | 2   5   148  |
| 56  1   56-8 | 46 *78  2   | 47  9   3    |
| 4   *78  2   | 3  5   9   | 67  178 168  |
+-------------+------------+--------------+
W-Wing 78 in BOX 78 with SL 7 in row 7; r8c3<>8 solves it.


R7c9<>1 due to locked 1s in r9. Then XY-Wing 478 , pivoted in r8c7 is exposed.
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Clement



Joined: 24 Apr 2006
Posts: 1111
Location: Dar es Salaam Tanzania
PostPosted: Wed Oct 24, 2012 5:51 am    Post subject: Oct 24 VH Reply with quote
Marty
Yep, my Code is not after Basics Embarassed Thanks for pointing out that.
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RobertRattley



Joined: 24 Jun 2007
Posts: 118
Location: Australia
PostPosted: Thu Oct 25, 2012 2:10 pm    Post subject: Reply with quote
I also found Marty's xy wing 478

but then after settling 4 more cells I found I needed a second (overlapping) xy wing 478, making this a 2 step VH. Did I miss something?
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