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Stuck

 
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cgordon



Joined: 04 May 2007
Posts: 769
Location: ontario, canada

PostPosted: Sun Feb 13, 2011 3:15 pm    Post subject: Stuck Reply with quote

I'm sure there's a second wing somewhere - or something else that I shoulda spotted. But for now I'm stuck. Confused

Code:
            
+-------+-------+-------+   
| 4 . 3 | 2 8 . | . . . |   
| . . . | 9 . . | . . . |   
| 8 9 5 | . . 7 | . . 4 |
+-------+-------+-------+   
| 7 . . | 8 . 1 | . . . |   
| . 8 1 | . . . | 6 7 . |   
| . . . | 7 . 6 | . . 3 |   
+-------+-------+-------+   
| 2 . . | 4 . . | 7 3 1 |   
| . . . | . . 3 | . . . |   
| . . . | . 7 2 | 8 . 6 |
+-------+-------+-------+
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Marty R.



Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA

PostPosted: Sun Feb 13, 2011 4:39 pm    Post subject: Reply with quote

Here's my quick try at playing online. This is my post-basics grid. I notice the XY-Wing pivoted in r4c2, but haven't played it yet.

Code:

+---------------+------------+-------------+
| 4    16   3   | 2   8    5 | 9   16   7  |
| 16   2    7   | 9   136  4 | 35  156  8  |
| 8    9    5   | 136 136  7 | 23  126  4  |
+---------------+------------+-------------+
| 7    36   26  | 8   23   1 | 45  459  59 |
| 35   8    1   | 35  4    9 | 6   7    2  |
| 59   45   249 | 7   25   6 | 1   8    3  |
+---------------+------------+-------------+
| 2    56   69  | 4   569  8 | 7   3    1  |
| 1569 7    8   | 156 1569 3 | 245 2459 59 |
| 1359 1345 49  | 15  7    2 | 8   459  6  |
+---------------+------------+-------------+

Play this puzzle online at the Daily Sudoku site
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Marty R.



Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA

PostPosted: Sun Feb 13, 2011 6:15 pm    Post subject: Reply with quote

Here I am after playing the XY-Wing plus a pincer transport. I don't see anything but haven't checked for X-Wings and chains.

Code:

+-----------+------------+-----------+
| 4   16 3  | 2   8    5 | 9  16  7  |
| 16  2  7  | 9   136  4 | 35 156 8  |
| 8   9  5  | 136 136  7 | 23 126 4  |
+-----------+------------+-----------+
| 7   36 26 | 8   23   1 | 45 459 59 |
| 35  8  1  | 35  4    9 | 6  7   2  |
| 59  4  29 | 7   25   6 | 1  8   3  |
+-----------+------------+-----------+
| 2   5  69 | 4   69   8 | 7  3   1  |
| 169 7  8  | 156 1569 3 | 24 24  59 |
| 139 13 4  | 15  7    2 | 8  59  6  |
+-----------+------------+-----------+

Play this puzzle online at the Daily Sudoku site
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keith



Joined: 19 Sep 2005
Posts: 3355
Location: near Detroit, Michigan, USA

PostPosted: Sun Feb 13, 2011 6:18 pm    Post subject: Reply with quote

Marty R. wrote:
Here I am after playing the XY-Wing plus a pincer transport. I don't see anything but haven't checked for X-Wings and chains.

Code:

+-----------+------------+-----------+
| 4   16 3  | 2   8    5 | 9  16  7  |
| 16  2  7  | 9   136  4 | 35 156 8  |
| 8   9  5  | 136 136  7 | 23 126 4  |
+-----------+------------+-----------+
| 7   36 26 | 8   23   1 | 45 459 59 |
| 35  8  1  | 35  4    9 | 6  7   2  |
| 59  4  29 | 7   25   6 | 1  8   3  |
+-----------+------------+-----------+
| 2   5  69 | 4   69   8 | 7  3   1  |
| 169 7  8  | 156 1569 3 | 24 24  59 |
| 139 13 4  | 15  7    2 | 8  59  6  |
+-----------+------------+-----------+

Play this puzzle online at the Daily Sudoku site

Skyscrapers take out 6 in R2C5 and R3C8. A W-wing plus transport takes out 5 in R8C5.

Marty, how did you solve R7C2? (Edit: I see it now.)

Keith
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keith



Joined: 19 Sep 2005
Posts: 3355
Location: near Detroit, Michigan, USA

PostPosted: Sun Feb 13, 2011 6:41 pm    Post subject: Reply with quote

Then, an M-wing based on 35 solves R4C5 as 2, and the puzzle.

Keith
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