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A quick one

 
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ravel



Joined: 21 Apr 2006
Posts: 536
PostPosted: Tue Jan 08, 2008 9:39 am    Post subject: A quick one Reply with quote
By TTHsieh
Code:
 +-------+-------+-------+
 | . . . | . . . | . . . |
 | . . 6 | 5 . 3 | 4 . . |
 | . 2 . | . 7 . | . 9 . |
 +-------+-------+-------+
 | . 1 . | . . . | . 5 . |
 | . . 8 | . 3 . | 7 . . |
 | . 9 . | . . . | . 2 . |
 +-------+-------+-------+
 | . 5 . | . 2 . | . 1 . |
 | . . 3 | 8 . 4 | 5 . . |
 | . . . | . . . | . . . |
 +-------+-------+-------+
Seems to be singles only, but interesting at the end.
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Asellus



Joined: 05 Jun 2007
Posts: 865
Location: Sonoma County, CA, USA
PostPosted: Tue Jan 08, 2008 9:54 am    Post subject: Reply with quote
Oh! How interesting....

There's a UR with a "Type 6"-type solution that, strictly speaking, isn't a Type 6 UR, though it almost is. In any case, it solves the puzzle.
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ravel



Joined: 21 Apr 2006
Posts: 536
PostPosted: Wed Jan 09, 2008 8:25 am    Post subject: Reply with quote
Code:
 *------------------------------------------*
 | 9   3  7  | 1246  46  12  | 16   8  5    |
 | 1   8  6  | 5     9   3   | 4    7  2    |
 | 4   2  5  | 16    7   8   | 136  9  36   |
 |-----------+---------------+--------------|
 | 37  1  2  | 47    48  6   | 9    5  38   |
 | 5   6  8  | 29    3   29  | 7    4  1    |
 | 37  9  4  | 17    58  15  | 36   2  368  |
 |-----------+---------------+--------------|
 | 6   5  9  | 3     2   7   | 8    1  4    |
 | 2   7  3  | 8     1   4   | 5    6  9    |
 | 8   4  1  | 69    56  59  | 2    3  7    |
 *------------------------------------------*

Here in the UR36 in r36c79 i eliminated 6 from r3c7 and 3 from r6c9. Then i was left with a BUG, where r1c4 had 4 candidates, a rare situation.
I also found 9 xy-chains in the grid.
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