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Bud
Joined: 06 May 2010
Posts: 47
Location: Tampa, Florida
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 Posted: Tue Nov 02, 2010 12:14 am Post subject: Extended S-Wing w/2 digit elimination |
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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
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| Posted: Tue Nov 02, 2010 3:41 am Post subject: |
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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
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| Posted: Wed Nov 03, 2010 12:39 pm Post subject: |
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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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