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Nov 8 VH

 
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TerenceF



Joined: 21 Dec 2007
Posts: 19
Location: Takapuna, NZ

PostPosted: Fri Nov 08, 2013 10:05 am    Post subject: Nov 8 VH Reply with quote

Code:

+---------------+---------------+------------+
| 4    256  3   | 7   258   58  | 1  9   268 |
| 289  29   7   | 6   2389  138 | 4  5   238 |
| 2589 2569 1   | 23  23589 4   | 38 368 7   |
+---------------+---------------+------------+
| 29   7    24  | 8   235   35  | 6  34  1   |
| 25   8    245 | 234 1     6   | 23 7   9   |
| 3    1    6   | 24  7     9   | 28 48  5   |
+---------------+---------------+------------+
| 6    25   25  | 9   4     38  | 7  1   38  |
| 7    4    9   | 1   38    2   | 5  368 368 |
| 1    3    8   | 5   6     7   | 9  2   4   |
+---------------+---------------+------------+

XY wing 238 pivot in r3c7 sets r6c4<>2
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hughwill



Joined: 05 Apr 2010
Posts: 222
Location: Birmingham UK

PostPosted: Fri Nov 08, 2013 12:13 pm    Post subject: Nov 8 VH Reply with quote

Terence said:

Quote:
XY wing 238 pivot in r3c7 sets r6c4<>2


After basics:
Code:

+--------------+--------------+------------+
| 4   256  3   | 7   258   58 | 1  9   268 |
| 28  29   7   | 6   2389  1  | 4  5   238 |
| 258 2569 1   | 23  23589 4  | 38 368 7   |
+--------------+--------------+------------+
| 9   7    24  | 8   235   35 | 6  34  1   |
| 25  8    245 | 234 1     6  | 23 7   9   |
| 3   1    6   | 24  7     9  | 28 48  5   |
+--------------+--------------+------------+
| 6   25   25  | 9   4     38 | 7  1   38  |
| 7   4    9   | 1   38    2  | 5  368 368 |
| 1   3    8   | 5   6     7  | 9  2   4   |
+--------------+--------------+------------+

Play this puzzle online at the Daily Sudoku site


.....and a 234 XY-Wing pivot r4c8 also sorts it out.
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kuskey



Joined: 10 Dec 2008
Posts: 127
Location: Pembroke, NH

PostPosted: Fri Nov 08, 2013 10:16 pm    Post subject: Nov 8 VH Reply with quote

Marty, I was able to solve it as a single stepper using the 234 xy-wing on Hugh's and my after-basics code. However, the cleanup after the xy wing was prolonged and a grinder right to the end and included some steps that could easily be overlooked.
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Marty R.



Joined: 12 Feb 2006
Posts: 5175
Location: Rochester, NY, USA

PostPosted: Sat Nov 09, 2013 12:20 am    Post subject: Reply with quote

Oops, thanks, I see where I screwed up. Embarassed
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