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daj95376
Joined: 23 Aug 2008
Posts: 3854
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 Posted: Mon Sep 13, 2010 5:08 am Post subject: Puzzle 10/09/13: B |
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| Code: | +-----------------------+
| . . . | . . . | . 2 . |
| 6 . . | . 5 3 | . . . |
| . . . | . 7 1 | . 9 3 |
|-------+-------+-------|
| . . . | . 6 . | . . . |
| . 7 . | 8 . . | . 4 . |
| . 8 3 | . . 4 | 6 . . |
|-------+-------+-------|
| . . . | . . 7 | 4 . . |
| 3 . 9 | . 2 . | . . . |
| 5 4 . | . . . | . . 2 |
+-----------------------+
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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: Mon Sep 13, 2010 9:54 am Post subject: |
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| Quote: | Kite (5)R5C4 : => r7c9<>5
X Wing (9)R67 : => r45c59<>9
NQ(1578)C7 or HT(239)C7
XY Wing (-139), pivot at R9C7 : r7c45,r9c8<>1
XY Wing (-139), pivot at R7C5 : r5c9<>1 |
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tlanglet
Joined: 17 Oct 2007
Posts: 2468
Location: Northern California Foothills
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| Posted: Mon Sep 13, 2010 3:19 pm Post subject: |
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Two steps .............
| Code: | *--------------------------------------------------------------------*
| 7 3 15 | 9 4 8 | 15 2 6 |
| 6 9 18 | 2 5 3 | 178 178 4 |
| 48 25 2458 | 6 7 1 | 58 9 3 |
|----------------------+----------------------+----------------------|
| 149 15 45 | 137 6 29 | 239 1378 1789 |
| 19 7 6 | 8 139 259 | 239 4 159 |
| 2 8 3 | 157 19 4 | 6 157 1579 |
|----------------------+----------------------+----------------------|
| 18 126 28 | 135 139 7 | 4 1356 159 |
| 3 16 9 | 4 2 56 | 178 15678 1578 |
| 5 4 7 | 13 8 69 | 39 136 2 |
*--------------------------------------------------------------------* |
| Quote: | ANP(19=5)r5c19-r5c6=(5-6)r8c6=(6-9)r9c6=(9=1=3)r765c5; r5c5<>19=3
xy-wing 13-9 vertex (13)r9c4; f7c9,r9c6<>9 |
Danny: did I handle you new notation properly for the last step of the ANP?
Ted |
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daj95376
Joined: 23 Aug 2008
Posts: 3854
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| Posted: Mon Sep 13, 2010 5:45 pm Post subject: |
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| tlanglet wrote: | Danny: did I handle you new notation properly for the last step of the ANP?
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Hmmm. My notation was intended to represent a simple ALS as a SIS-type operation that links an initial elimination to a final assignment. Right now, you have an initial assignment linked to a final assignment. To use my notation, I would change your chain to:
(19=5)r5c19-r5c6=(5-6)r8c6=(6-9)r9c6=(9)r7c5-(9=1=3)r65c5; r5c5<>19=3
However, what you have is a Naked Subset that collapses.
(19=5)r5c19-r5c6=(5-6)r8c6=(6-9)r9c6=NT(913)r765c5; r5c5<>19=3
Or a simple sub-chain that ignores <1> completely.
(19=5)r5c19-r5c6=(5-6)r8c6=(6-9)r9c6=(9-3)r7c5=(3)r5c5; r5c5<>19=3
Regards, Danny |
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tlanglet
Joined: 17 Oct 2007
Posts: 2468
Location: Northern California Foothills
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| Posted: Mon Sep 13, 2010 7:04 pm Post subject: |
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Thanks Danny,
I saw the straightforward step .... =(6-9Pr9c6=(9-3)r7c5=(3)r5c5 but wanted to verify my use of your new notation, which I now understand was used incorrectly.
Ted |
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Marty R.
Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA
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| Posted: Tue Sep 14, 2010 5:08 am Post subject: |
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ER (5)
XYZ-Wing (139)
XYZ-Wing (139) (yes, two with the same numbers)
XY-Chain
M-Wing (39) + pincer transport |
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Marty R.
Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA
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| Posted: Tue Sep 14, 2010 3:34 pm Post subject: |
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Better solution on the second try.
ER (5)
XY-Wing (391), flightless with pincer transport
XY-Wing (693) + pincer transport |
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