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Clement
Joined: 24 Apr 2006
Posts: 1111
Location: Dar es Salaam Tanzania
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 Posted: Thu Feb 25, 2010 10:07 pm Post subject: Feb 26 VH |
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An XYZ-Wing 126 with Pincers 16 in r2c1 and 26 in r5c3 eliminating 6 in r4c1 solves the puzzle.
There is also a UR 89 in row 8 which equally solves it. |
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Marty R.
Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA
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| Posted: Fri Feb 26, 2010 4:45 am Post subject: |
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| Another XYZ-Wing in the same boxes will do it too, on 136, accomplishing the same thing slightly differently. Also a W-Wing on 16 in boxes 16 does it as well. |
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cgordon
Joined: 04 May 2007
Posts: 769
Location: ontario, canada
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| Posted: Fri Feb 26, 2010 1:39 pm Post subject: |
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| It's a good one for the crayons: colouring on <1>. |
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tlanglet
Joined: 17 Oct 2007
Posts: 2468
Location: Northern California Foothills
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| Posted: Fri Feb 26, 2010 3:38 pm Post subject: Re: Feb 26 VH |
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| Clement wrote: | | There is also a UR 89 in row 8 which equally solves it. |
Clement, I also used the Type 1 UR89, but it was not a one-step solution.
Ted |
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Clement
Joined: 24 Apr 2006
Posts: 1111
Location: Dar es Salaam Tanzania
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| Posted: Fri Feb 26, 2010 6:18 pm Post subject: Feb 26 VH |
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Tlanglet,
Your are quite right the UR does not solve in one step, I didn't check it properly. It has to be followed by an X-Wing in 1 and XY- Wing 23 36 26. |
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keith
Joined: 19 Sep 2005
Posts: 3355
Location: near Detroit, Michigan, USA
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| Posted: Sat Feb 27, 2010 2:45 pm Post subject: |
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| Code: |
+-------+-------+-------+
| . . . | 7 . . | 6 . . |
| . 4 . | . . 2 | . 9 . |
| 7 2 . | . 9 . | . 3 . |
+-------+-------+-------+
| . . . | . 2 . | 5 . 9 |
| . 8 . | 9 . 4 | . 7 . |
| 5 . 7 | . 6 . | . . . |
+-------+-------+-------+
| . 5 . | . 7 . | . 4 8 |
| . 6 . | 4 . . | . 2 . |
| . . 1 | . . 3 | . . . |
+-------+-------+-------+
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Play this puzzle online at the Daily Sudoku site
After basics: | Code: | +----------------+----------------+----------------+
| 89 13 3589 | 7 4 18 | 6 15 2 |
| 16% 4 56 | 15% 3 2 | 8 9 7 |
| 7 2 58 | 158# 9 6 | 4 3 15# |
+----------------+----------------+----------------+
|-136 13 4 |-18 2 7 | 5 168 9 |
| 126@ 8 26 | 9 5 4 | 3 7 16@ |
| 5 9 7 | 3 6 18 | 2 18 4 |
+----------------+----------------+----------------+
| 23 5 23 | 6 7 9 | 1 4 8 |
| 89 6 89 | 4 1 5 | 7 2 3 |
| 4 7 1 | 2 8 3 | 9 56 56 |
+----------------+----------------+----------------+ |
I must be on the slow side. Over the years I have convinced myself (and, perhaps, Marty) that swordfish are not worth bothering to find. Now I realize that my compound skyscrapers are (franken) swordfish (I think).
I see this as a skyscraper grounded in C9. The two towers are @ and the compound tower #%. Taking out 1 in R4C1.
There are various ways to find the elimination in R4C4, including the compound skyscraper with towers # and @%, or by noting that the pincers are both in the same house, C1, so we have a cycle.
Keith |
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Marty R.
Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA
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| Posted: Sat Feb 27, 2010 4:28 pm Post subject: |
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| I do see an ordinary swordfish there. I don't know what a franken anything is. I'm also having a problem with terminology (towers, compound skyscrapers). I see skyscrapers and rows 35 and a strong link in row 2. |
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keith
Joined: 19 Sep 2005
Posts: 3355
Location: near Detroit, Michigan, USA
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| Posted: Sat Feb 27, 2010 8:51 pm Post subject: |
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Danny (or someone),
What is this called? | Code: | +-----------------------------------+
| . X . | . / . | / * * |
| * / * | . / . | X . . |
| . / . | . / . | / . . |
|-----------+-----------+-----------|
| . / . | . X . | X . . |
| . / . | . / . | / . . |
| . / . | . / . | / . . |
|-----------+-----------+-----------|
| . / . | . / . | / . . |
| . / . | . / . | / . . |
| . X . | . X . | / . . |
+-----------------------------------+
X contains the candidate
/ does not contain the candidate
* cells where eliminations are possible |
Yes, it is multicoloring. I call it a compound skyscraper since I generally find this type of pattern when looking for kites and skyscrapers.
Would anyone classify it as a fish? Note that if we move the candidate from R1C2 to R2C2 it becomes a swordfish.
Keith |
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daj95376
Joined: 23 Aug 2008
Posts: 3854
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| Posted: Sun Feb 28, 2010 6:06 am Post subject: |
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| keith wrote: | Danny (or someone),
What is this called? Would anyone classify it as a fish? Note that if we move the candidate from R1C2 to R2C2 it becomes a swordfish.
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A Skyscraper is 2x Sashimi X-Wings performed simultaneously. What you have is 2x Sashimi Swordfish that you are performing simultaneously.
| Code: | Sashimi Swordfish #1: c257\r149 w/fin cell r2c7 => r1c89<>X
Sashimi Swordfish #2: c257\r249 w/fin cell r1c2 => r2c13<>X
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Notice that the Sashimi Swordfish only differ by the selection of [r1] vs [r2] in the cover set. I called this a Siamese Sashimi Swordfish, but it never caught on. Ironically, the topic of Siamese fish was resurrected in the Players' Forums within the past few days. However, their intent was to expand the definition.
Regards, Danny |
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