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daj95376
Joined: 23 Aug 2008
Posts: 3854
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 Posted: Tue Sep 07, 2010 12:30 am Post subject: Puzzle 10/09/07: B |
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| Code: | +-----------------------+
| 8 . . | . 3 . | . . . |
| . 1 . | . . . | . . . |
| . . . | 1 . . | 9 8 6 |
|-------+-------+-------|
| . . 2 | 8 . . | . . 7 |
| 6 3 . | . . . | . . . |
| . . . | . . 6 | . . . |
|-------+-------+-------|
| . 6 3 | . . . | 8 . . |
| . . 9 | . . 7 | . 2 5 |
| . . 8 | 3 . 5 | . 9 4 |
+-----------------------+
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Play this puzzle online at the Daily Sudoku site |
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JC Van Hay
Joined: 13 Jun 2010
Posts: 494
Location: Charleroi, Belgium
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| Posted: Tue Sep 07, 2010 5:17 am Post subject: |
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| Quote: | Finned X Wing (4)C38 : r2c1<>4
Finned X Wing (5)R34 : r1c2<>5
XY Wing (5-79), pivot at R4C2 : r23c3<>7 |
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peterj
Joined: 26 Mar 2010
Posts: 974
Location: London, UK
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| Posted: Tue Sep 07, 2010 5:16 pm Post subject: |
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Is this valid logic??
An xyz-wing(79-5) using a sort of pseudocell (57)
| Code: | *--------------------------------------------------------------------*
| 8 579a 6 | 57 3 49 | 457 1 2 |
| 29 1 457c | 29 6 8 | 457 45 3 |
| 3 27-5 457c | 1 57 24 | 9 8 6 |
|----------------------+----------------------+----------------------|
| 49 59b 2 | 8 45 3 | 1 6 7 |
| 6 3 57 | 24579 24579 1 | 245 45 8 |
| 47 8 1 | 2457 2457 6 | 245 3 9 |
|----------------------+----------------------+----------------------|
| 5 6 3 | 249 249 29 | 8 7 1 |
| 1 4 9 | 6 8 7 | 3 2 5 |
| 27 27 8 | 3 1 5 | 6 9 4 |
*--------------------------------------------------------------------*
(4) has to occur in one of r23c3. In either case a (57) is made in b1 making the xyz-wing pivot on r1c2 => r3c2<>5
ER(5) ; r1c2<>5 then to finish... |
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daj95376
Joined: 23 Aug 2008
Posts: 3854
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| Posted: Tue Sep 07, 2010 6:07 pm Post subject: |
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I consider an XYZ-Wing to be a constrained form of Kraken Cell logic:
| Code: | (5)r1c2 - (5)r3c2
(9)r1c2 - (9= 5)r4c2 - (5)r3c2
(7)r1c2 - (7=45)r23c3 - (5)r3c2
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Cell r4c2 is in a "line" with r1c2, and cells r23c3 are in the same box with r1c2. It looks like an XYZ-Wing to me! |
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ronk
Joined: 07 May 2006
Posts: 398
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| Posted: Tue Sep 07, 2010 6:36 pm Post subject: |
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Four candidate values in four cells makes it a wxyz-wing IMO. Furthermore, since no single cell contains all four candidate values ... it's a "generalized" wxyz-wing.
I recommend avoiding this naming issue by calling it an ALS-xz. |
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Mogulmeister
Joined: 03 May 2007
Posts: 1151
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| Posted: Tue Sep 07, 2010 8:47 pm Post subject: |
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| Indeed. |
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