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Extended S-Wing w/2 digit elimination

 
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Bud



Joined: 06 May 2010
Posts: 47
Location: Tampa, Florida

PostPosted: Tue Nov 02, 2010 12:14 am    Post subject: Extended S-Wing w/2 digit elimination Reply with quote

The cells in a 23 S-Wing are labeled *. The extension is labeled #.
The pivot at r8c3 results in either r3c1=2 or r5c1 =3 and r1c1=4. This => that r3c1<>34.

Extended S-Wing Example
Code:

+-------------------+-------------------+--------------------+
| 34#     9     6   | 7      8    34    | 1      5     2     |
| 1345    1347  8   | 2      159  1349  | 3467   3469  4679  |
| 12-3-45* 1347 235*| 3459   6    1349  | 8      349   479   |
+-------------------+-------------------+--------------------+
| 7       16    4   | 68     3    5     | 9      2     18    |
| 135*    2     35* | 689    4    69    | 56     7     18    |
| 58      68    9   | 1      2    7     | 456    46    3     |
+-------------------+-------------------+--------------------+
| 23489   348   1   | 34569  7    23469 | 2346   3469  4569  |
| 2349    34    23* | 34569  59   8     | 23467  1     45679 |
| 6       5     7   | 349    19   12349 | 234    8     49    |
+-------------------+-------------------+--------------------+


The original puzzle is the 8-2-10 tough at sudoku.com.au. I used only basic moves to reach this point in the puzzle.
Edit:
090000152 000200000 000060800
700005900 020040070 009100003
001070000 000008010 657000080


Last edited by Bud on Tue Nov 02, 2010 7:06 pm; edited 1 time in total
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keith



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

PostPosted: Tue Nov 02, 2010 3:41 am    Post subject: Reply with quote

Bud,

It would be convenient if you post the original puzzle, or, at least, a link to the precise puzzle.

Keith
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Bud



Joined: 06 May 2010
Posts: 47
Location: Tampa, Florida

PostPosted: Wed Nov 03, 2010 12:39 pm    Post subject: Reply with quote

Hi keith,
Here is the original puzzle with no basic moves. I will try to include this with any future posts.
Code:

+----------------------+---------------------+------------------------+
| 348    9       3468  | 3478   38     347   | 1       5       2      |
| 13458  134678  34568 | 2      13589  13479 | 3467    3469    4679   |
| 12345  1347    2345  | 34579  6      13479 | 8       349     479    |
+----------------------+---------------------+------------------------+
| 7      13468   3468  | 368    238    5     | 9       1246    1468   |
| 1358   2       3568  | 3689   4      369   | 56      7       1568   |
| 458    468     9     | 1      28     267   | 2456    246     3      |
+----------------------+---------------------+------------------------+
| 23489  348     1     | 34569  7      23469 | 23456   23469   4569   |
| 2349   34      234   | 34569  12359  8     | 234567  123469  145679 |
| 6      5       7     | 349    1239   12349 | 234     8       149    |
+----------------------+---------------------+------------------------+


I have shown the puzzle after the first advanced move in the diagram below. My second advanced move is also an extended S-Wing with cells labeled *. Here the 59 pivot is r8c5 which results in either r7c1=9 or r2c1=5 and r6c1=8, which => r7c1<>8. The only other advanced move I used to finish the puzzle was a 9 2-string kite.

Code:

+-------------------+-------------------+--------------------+
| 34      9     6   | 7      8    34    | 1      5     2     |
| 1345*   1347  8   | 2      159* 1349  | 3467   3469  4679  |
| 125     1347  235 | 3459   6    1349  | 8      349   479   |
+-------------------+-------------------+--------------------+
| 7       16    4   | 68     3    5     | 9      2     18    |
| 135     2     35  | 689    4    69    | 56     7     18    |
| 58*     68    9   | 1      2    7     | 456    46    3     |
+-------------------+-------------------+--------------------+
| 234-89* 348   1   | 34569  7    23469 | 2346   3469  4569  |
| 2349*   34    23  | 34569  59*  8     | 23467  1     45679 |
| 6       5     7   | 349    19   12349 | 234    8     49    |
+-------------------+-------------------+--------------------+
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