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Clement
Joined: 24 Apr 2006
Posts: 1113
Location: Dar es Salaam Tanzania
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 Posted: Mon Apr 06, 2015 10:38 pm Post subject: Apr 7 VH |
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| Code: |
+-----------+-----------+---------+
| 7 6 8 | 5 19 49 | 2 14 3 |
| 9 1 5 | 48 3 2 | 7 48 6 |
| 3 4 2 | 78 17 6 | 9 18 5 |
+-----------+-----------+---------+
| 5 7 4 | 6 2 1 | 3 9 8 |
| 1 2 9 | 3 8 7 | 56 56 4 |
| 68 38 36 | 9 4 5 | 1 2 7 |
+-----------+-----------+---------+
| 2 38 36 | 1 5 348 | 46 7 9 |
| 8-4 589 7 | 2 6 489 | 45 3 1 |
| 46 359 1 | 47 79 349 | 8 56 2 |
+-----------+-----------+---------+
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XY-Wing 56-4 pivoted in r9c8; r8c1<>4; stte |
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kuskey
Joined: 10 Dec 2008
Posts: 141
Location: Pembroke, NH
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| Posted: Tue Apr 07, 2015 6:50 am Post subject: Apr 7 VH |
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| Clement, after looking at your after-basics code I see much more basic work that can be done. After a fashion, you end up with a BUG+1 in box 8 which is another 1-stepper solution. Many hiddens in this puzzle. I concur with your XY-wing. I solved it 3 times and got 3 identical results. |
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Clement
Joined: 24 Apr 2006
Posts: 1113
Location: Dar es Salaam Tanzania
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| Posted: Tue Apr 07, 2015 7:03 am Post subject: Re: Apr 7 VH |
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| kuskey wrote: | | Clement, after looking at your after-basics code I see much more basic work that can be done. After a fashion, you end up with a BUG+1 in box 8 which is another 1-stepper solution. Many hiddens in this puzzle. I concur with your XY-wing. |
Thanks kuskey for pointing that out. Uncompleted basics can sometimes(it has happened) result to an invalid path leading to the solution. Thanks. |
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dongrave
Joined: 06 Mar 2014
Posts: 572
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| Posted: Wed Apr 08, 2015 2:03 am Post subject: |
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| I wouldn't really call that much more basic work. To me it looks like he only missed one of the 2 possible naked pairs in column 2 followed by the lone 3 in row 9 (I think). |
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