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daj95376
Joined: 23 Aug 2008
Posts: 3854
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 Posted: Fri Jul 30, 2010 4:54 am Post subject: Puzzle 10/07/30: A |
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| Code: | +-----------------------+
| 3 . 6 | . . . | 8 7 5 |
| . . 4 | 8 . . | . . 9 |
| 8 5 7 | . . 9 | . . . |
|-------+-------+-------|
| . 4 . | 1 9 . | . . 2 |
| . . . | 7 5 . | . . . |
| . . 5 | . . 2 | . . 7 |
|-------+-------+-------|
| 4 . . | . . . | 7 9 3 |
| 5 . . | . . . | 4 . . |
| 9 7 . | 4 . 3 | 5 . 1 |
+-----------------------+
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Play this puzzle online at the Daily Sudoku site
| Rating wrote: | BBDB Advanced
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tlanglet
Joined: 17 Oct 2007
Posts: 2468
Location: Northern California Foothills
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| Posted: Fri Jul 30, 2010 2:32 pm Post subject: |
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Taking as I saw them, I had three steps......
| Quote: | Type 1 UR (36)r36c45; r6c5<>36
Flightless AXY-wing 1-68 vertex (18)r6c2, pincers (16)r6c1 & (68)r8c2 with fin (3)r8c2
If xy-wing is true with transport: (6)r8c2-r8c89=(6)r9c8; r6c8<>6
If fin is true: (3)r8c2-r5c2=r4c3-(3=6)r4c7; r6c8<>6
xy-wing 4-68 vertex (48)r6c5 with pseudocell pincer (46)box6; r4c7,r5c6<>6 |
Ted |
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Mogulmeister
Joined: 03 May 2007
Posts: 1151
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| Posted: Fri Jul 30, 2010 3:53 pm Post subject: |
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Two Steps:
| Quote: |
1. UR 36 r6c5<>36
2. A quasi XYZ Wing or just an AIC if you prefer:
(6=8)r4c6-(8=4)r6c5-(4=68)r6c7&r5c9-(6)r4c7; r4c7<>6
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tlanglet
Joined: 17 Oct 2007
Posts: 2468
Location: Northern California Foothills
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| Posted: Fri Jul 30, 2010 4:06 pm Post subject: |
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| Mogulmeister wrote: | Two Steps:
| Quote: |
1. UR 36 r6c5<>36
2. A quasi XYZ Wing or just an AIC if you prefer:
(6=8)r4c6-(8=4)r6c5-(4=68)r6c7&r5c9-(6)r4c7; r4c7<>6
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MM,
Your second move is what I have been calling a Kraken cell based on a comment from Luke.
Ted |
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Mogulmeister
Joined: 03 May 2007
Posts: 1151
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| Posted: Fri Jul 30, 2010 4:36 pm Post subject: |
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Thanks Ted - I wasn't sure what to call it at all to be honest and in the end I reverted to my "global AIC" view. Happy to call it Kraken cell. The "&" was meant to be a "pipe" but I'm on a different keyboard today and can't find it!
PS Did you get my pm from last week about one of your earlier puzzles ? I was asking about the interesting M{} thing ! |
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daj95376
Joined: 23 Aug 2008
Posts: 3854
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| Posted: Fri Jul 30, 2010 6:52 pm Post subject: |
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| Mogulmeister wrote: | The "&" was meant to be a "pipe" but I'm on a different keyboard today and can't find it!
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FWIW: my practice is to use a comma to separate cells in a list. |
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ronk
Joined: 07 May 2006
Posts: 398
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| Posted: Fri Jul 30, 2010 7:08 pm Post subject: |
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| tlanglet wrote: | | Mogulmeister wrote: | ...
2. A quasi XYZ Wing or just an AIC if you prefer:
(6=8)r4c6-(8=4)r6c5-(4=68)r6c7&r5c9-(6)r4c7; r4c7<>6
... |
Your second move is what I have been calling a Kraken cell based on a comment from Luke. |
Errr ... when a poly-valued cell is part of an ALS, I believe Luke451 and even Mike Barker would avoid use of the kraken term. |
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tlanglet
Joined: 17 Oct 2007
Posts: 2468
Location: Northern California Foothills
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| Posted: Fri Jul 30, 2010 7:39 pm Post subject: |
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| ronk wrote: | | tlanglet wrote: | | Mogulmeister wrote: | ...
2. A quasi XYZ Wing or just an AIC if you prefer:
(6=8)r4c6-(8=4)r6c5-(4=68)r6c7&r5c9-(6)r4c7; r4c7<>6
... |
Your second move is what I have been calling a Kraken cell based on a comment from Luke. |
Errr ... when a poly-valued cell is part of an ALS, I believe Luke451 and even Mike Barker would avoid use of the kraken term. |
Ron,
Thanks for the feedback.
My response was directed to the "quasi xyz-wing" phase used by MM. In the context of the AIC, I understand that "Kraken cell" is not appropriate.
Ted |
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peterj
Joined: 26 Mar 2010
Posts: 974
Location: London, UK
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| Posted: Fri Jul 30, 2010 7:40 pm Post subject: |
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Here's a one stepper (I think - I'm on a train and it's noisy) ..
| Quote: | | ANT(268)[(3)r5c2=(268)r5c129] - (68=4)r5c6 - AUR1(36)[(4)r6c5=(8)r6c5] - (8=6)r4c6 - (6=3)r4c7 ; r4c3<>3, r5c8<>3 |
(You might suspect that initially I played the AUR seperately!)
[Edit. Looks pretty similar to mm's move now I look at the posts?] |
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daj95376
Joined: 23 Aug 2008
Posts: 3854
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| Posted: Fri Jul 30, 2010 9:31 pm Post subject: |
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| tlanglet wrote: | I understand that "Kraken cell" is not appropriate.
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My OCD finally forced me to research the use of "Kraken Cell".
My first encounter with "Kraken Cell" was in a Mike Barker post describing how a remote fin cell could be linked through a chain to one or more eliminations in a fish pattern.
It now seems that "Kraken Cell" is associated with a specialized forcing chain where all of the streams emanate from the candidates in a single cell. |
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Luke451
Joined: 20 Apr 2008
Posts: 310
Location: Southern Northern California
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| Posted: Fri Jul 30, 2010 11:50 pm Post subject: |
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Hi, Ted,
Looks like y'all have already straightened this one out. Just to be clear,
my note was in reference to this type of move:
| Code: | "Weird" xyz-wing (169)r7c4
(1)r7c4; r8c4<>1
(6)r7c4-(6=3)r7c2-(3=1)r5c2-r5c5=(1)r8c5; r8c4<>1
(9)r7c4-(9=1)r8c5; r8c4<>1 |
I have seen folks call these "kraken cells" on many occasions.
If a pattern or AIC etc takes care of the same elim, IMO that would be
a better way to go. Still, this is one of those practices that is good to know/
practice for more extreme puzzles.
| Danny wrote: | | It now seems that "Kraken Cell" is associated with a specialized forcing chain where all of the streams emanate from the candidates in a single cell. |
The same usage has been applied to "kraken row/column/box," to the dismay of some.
How widely accepted it is I can't say for sure, but it's definitely in common use.
Here is an example from earlier this very month... |
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Marty R.
Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA
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| Posted: Sat Jul 31, 2010 1:23 am Post subject: |
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Type 1 UR (36)
XYZ-Wing (128)
XY-Wing (368) + pincer transport
M-Wing (46) |
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