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5 days without vh

 
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nataraj



Joined: 03 Aug 2007
Posts: 1048
Location: near Vienna, Austria

PostPosted: Fri Nov 16, 2007 11:14 am    Post subject: 5 days without vh Reply with quote

how horrible. no vh since last Sunday.

In the meantime, I came across this one:
Code:

+-----------+-----------+-----------+
|  9  .  .  |  .  .  6  |  8  .  .  |
|  .  .  .  |  .  .  3  |  4  .  .  |
|  .  .  .  |  .  9  .  |  .  5  .  |
+-----------+-----------+-----------+
|  3  7  .  |  6  .  .  |  1  .  .  |
|  5  .  .  |  .  2  .  |  .  .  6  |
|  .  .  2  |  .  .  7  |  .  3  4  |
+-----------+-----------+-----------+
|  .  8  .  |  .  1  .  |  .  .  .  |
|  .  .  5  |  7  .  .  |  .  .  .  |
|  .  .  1  |  2  .  .  |  .  .  7  |
+-----------+-----------+-----------+

from http://www.sudocue.net/olddaily.php?id=703&sol=0 (yes I am still trying to get a grip on those uniqueness patterns Confused )

This is as far as I get with "regular" advanced methods
Code:

+--------------------------+--------------------------+--------------------------+
| 9       12345   347      | 145     457     6        | 8       127     123      |
| 12678   1256    67       | 158     578     3        | 4       12679   129      |
| 14678   1346    3467     | 148     9       2        | 367     5       13       |
+--------------------------+--------------------------+--------------------------+
| 3       7       89       | 6       45      49       | 1       289     2589     |
| 5       49      489      | 3       2       1        | 79      789     6        |
| 16      16      2        | 589     58      7        | 59      3       4        |
+--------------------------+--------------------------+--------------------------+
| 2467    8       34679    | 49      1       459      | 23569   469     359      |
| 246     23469   5        | 7       36      489      | 2369    14689   1389     |
| 46      3469    1        | 2       36      4589     | 3569    4689    7        |
+--------------------------+--------------------------+--------------------------+

Using UR (36) in r89c57 I arrive at r5c7=7, which takes me quite some way but the puzzle is not solved yet.

Here ...

Code:
+--------------------------+--------------------------+--------------------------+
| 9       235     34       | 145     457     6        | 8       17      12       |
| 28      25      6        | 158     578     3        | 4       179     129      |
| 78      1       47       | 48      9       2        | 6       5       3        |
+--------------------------+--------------------------+--------------------------+
| 3       7       89       | 6       45      49       | 1       2       589      |
| 5       4       89       | 3       2       1        | 7       89      6        |
| 1       6       2        | 589     58      7        | 59      3       4        |
+--------------------------+--------------------------+--------------------------+
| 27      8       37       | 49      1       459      | 23      6       59       |
| 46      239     5        | 7       36      89       | 239     148     18       |
| 46      39      1        | 2       36      589      | 359     48      7        |
+--------------------------+--------------------------+--------------------------+


I found an ER on '9' in box 9 (strong link in row 6), which takes out 9 from r7c4 and finally solved the puzzle.


Thought I let you guys have a go at it while we wait for tomorrow's vh.

cheers
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Asellus



Joined: 05 Jun 2007
Posts: 865
Location: Sonoma County, CA, USA

PostPosted: Fri Nov 16, 2007 9:45 pm    Post subject: Reply with quote

Without the UR, there is a (seldom seen in these parts) Sue de Coq in R3 and Box 1 involving {1348} and {67}. It eliminates <3> from R3C7, <6> from R2C12, and <7> from R1C3 and R2C1. After that, the same <9> ER finishes the puzzle.

There is also an interesting finned fish approach in those <9>s that can be used in place of that final ER. There are two different ways to view it:

(1) Finned X-Wing with transported fin: The Finned X-Wing with "useless" fin R6C7 is in C27. The fin can be transported to R7C4 via R6C4.

(2) Finned Jellyfish in R2457 with fin R7C4.

Either way, <9>s are eliminated from R89C6.
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