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Feb 25 VH

 
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Clement



Joined: 24 Apr 2006
Posts: 656
Location: Dar es Salaam Tanzania

PostPosted: Mon Feb 24, 2014 10:13 pm    Post subject: Feb 25 VH Reply with quote

Code:

+-----------+------------+-----------+
| 129 3  19 | *24 6   5   | 7 8   49  |
| 68  68 4  | 9  3   7   | 2 1   5   |
| 29  7  5  | 8  124 1-4  | 3 46  469 |
+-----------+------------+-----------+
| 4   2  8  | 1  9   6   | 5 7   3   |
| 7   1  36 | #23 5   8   | 4 9   26  |
| 5   9  36 | 7  24  *34  | 1 26  8   |
+-----------+------------+-----------+
| 3   48 7  | 6  148 2   | 9 5   14  |
| 18  5  2  | 34 18  9   | 6 34  7   |
| 169 46 19 | 5  7   134 | 8 234 124 |
+-----------+------------+-----------+
XY-Wing 23-4 pivoted in r5c4; r3c6<>4 opens another
XY-Wing 46-2 pivoted in r3c8; r6c5<>2; stte.
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hughwill



Joined: 05 Apr 2010
Posts: 167
Location: Birmingham UK

PostPosted: Tue Feb 25, 2014 10:05 am    Post subject: Feb 25 VH Reply with quote

Code:

+-----------+------------+-----------+
| 129 3  19 | 24 6   5   | 7 8   49  |
| 68  68 4  | 9  3   7   | 2 1   5   |
| 29  7  5  | 8  124 14  | 3 46  469 |
+-----------+------------+-----------+
| 4   2  8  | 1  9   6   | 5 7   3   |
| 7   1  36 | 23 5   8   | 4 9   26  |
| 5   9  36 | 7  24  34  | 1 26  8   |
+-----------+------------+-----------+
| 3   48 7  | 6  148 2   | 9 5   14  |
| 18  5  2  | 34 18  9   | 6 34  7   |
| 169 46 19 | 5  7   134 | 8 234 124 |
+-----------+------------+-----------+

Play this puzzle online at the Daily Sudoku site


Another 234 XY-Wing pivot r5c4 removes 4 from r7c5 leading to Clement's
second XY wing. A lot of red herrings in this one- I was sure there was a
one stepper somewhere.....
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Marty R.



Joined: 12 Feb 2006
Posts: 5123
Location: Rochester, NY, USA

PostPosted: Tue Feb 25, 2014 2:57 pm    Post subject: Reply with quote

I also needed two XY-Wings.
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JC Van Hay



Joined: 13 Jun 2010
Posts: 365
Location: Charleroi, Belgium

PostPosted: Tue Feb 25, 2014 5:21 pm    Post subject: Reply with quote

Code:
+-------------+----------------+---------------+
| 129  3   19 | 2(4)  6    5   | 7  8     9(4) |
| 68   68  4  | 9     3    7   | 2  1     5    |
| 29   7   5  | 8     124  14  | 3  6-4   469  |
+-------------+----------------+---------------+
| 4    2   8  | 1     9    6   | 5  7     3    |
| 7    1   36 | 23    5    8   | 4  9     26   |
| 5    9   36 | 7     24   34  | 1  26    8    |
+-------------+----------------+---------------+
| 3    48  7  | 6     148  2   | 9  5     1-4  |
| 18   5   2  | 3(4)  18   9   | 6  3(4)  7    |
| 169  46  19 | 5     7    134 | 8  234   12-4 |
+-------------+----------------+---------------+
Skyscraper(4r1c49,4r8c48)-4r3c8,r79c9; ste
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Clement



Joined: 24 Apr 2006
Posts: 656
Location: Dar es Salaam Tanzania

PostPosted: Tue Feb 25, 2014 8:50 pm    Post subject: Feb 25 VH Reply with quote

Code:

+-----------+------------+-----------+
| 129 3  19 | a24 6   5   | 7 8   9-4  |
| 68  68 4  | 9  3   7   | 2 1   5   |
| 29  7  5  | 8  124 14  | 3 f46  469 |
+-----------+------------+-----------+
| 4   2  8  | 1  9   6   | 5 7   3   |
| 7   1  36 | b23 5   8   | 4 9   26  |
| 5   9  36 | 7  d24  c34  | 1 e26  8   |
+-----------+------------+-----------+
| 3   48 7  | 6  148 2   | 9 5   14  |
| 18  5  2  | 34 18  9   | 6 34  7   |
| 169 46 19 | 5  7   134 | 8 234 124 |
+-----------+------------+-----------+
Another single stepper is
XY Chain: (4=2)r1c4-(2=3)r5c4-(3=4)r6c6-(4=2)r6c5-(2=6)r6c8-(6=4)r3c8; r1c9<>4.
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