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DB Saturday Puzzle - October 14, 2006

 
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keith



Joined: 19 Sep 2005
Posts: 3355
Location: near Detroit, Michigan, USA
PostPosted: Sat Oct 14, 2006 7:59 am    Post subject: DB Saturday Puzzle - October 14, 2006 Reply with quote
May be a UR in there!

Code:
Puzzle: DB101406  ******
+-------+-------+-------+
| . . . | . 3 1 | 9 . . |
| . . . | . . . | 3 . 7 |
| . . . | . . 6 | . 8 5 |
+-------+-------+-------+
| 2 . . | . 8 . | 7 1 . |
| . 4 . | . . . | . 3 . |
| . 7 8 | . 2 . | . . 6 |
+-------+-------+-------+
| 3 8 . | 7 . . | . . . |
| 5 . 2 | . . . | . . . |
| . . 7 | 9 1 . | . . . |
+-------+-------+-------+


Keith
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Marty R.



Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA
PostPosted: Sat Oct 14, 2006 4:22 pm    Post subject: Reply with quote
Quote:
May be a UR in there!


There was!

After the basic stuff and a Type 4, here was my position:

Code:
-------------------------------------------------
|7    25   56   |8    3    1    |9    246  24   |
|8    12   16   |5    49   49   |3    26   7    |
|9    3    4    |2    7    6    |1    8    5    |
-------------------------------------------------
|2    59   3    |6    8    459  |7    1    49   |
|6    4    59   |1    59   7    |2    3    8    |
|1    7    8    |34   2    39   |45   459  6    |
-------------------------------------------------
|3    8    19   |7    456  245  |456  2459 1249 |
|5    19   2    |34   46   38   |468  7    19   |
|4    6    7    |9    1    258  |58   25   3    |
-------------------------------------------------


At this point, an XYZ-Wing broke open the puzzle, which is pretty rare for me, that is, for that technique to have such a powerful effect.
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TexCat



Joined: 07 Jul 2006
Posts: 32
PostPosted: Sat Oct 14, 2006 9:08 pm    Post subject: Reply with quote
Back to trial and error for me this week. I think I reached the same position, and then started with square 1 one way that didn't work and then did it the other way. The snag in the first way was with the 459's and so I suspect that's where the xyz-wing was, but finding xy-wings is near impossible for me, and xyz-wings are certainly impossible.
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Marty R.



Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA
PostPosted: Sat Oct 14, 2006 9:32 pm    Post subject: Reply with quote
Quote:
The snag in the first way was with the 459's and so I suspect that's where the xyz-wing was, but finding xy-wings is near impossible for me, and xyz-wings are certainly impossible.


Yes, the 459 in r4c6 is the base cell for the XYZ-Wing.

I'm not sure why finding the XY and XYZ is so difficult. Once you memorize or write down the patterns of each, it's just a matter of picking starting cells and scanning.

Don't hesitate to ask if you have questions. I made a pain in the butt of myself with all my questions, but I learned a lot by doing that. I'd be happy to help if I could, as would others who post here, most of whom are more advanced than I am.

Good luck.
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