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Earl
Joined: 30 May 2007
Posts: 677
Location: Victoria, KS
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 Posted: Sat Feb 16, 2008 3:31 pm Post subject: Feb 16 DB |
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This DB has a few hidden trips and then a skyscaper (9) solves it.
Earl
| Code: |
+-------+-------+-------+
| 1 . . | . . . | . . . |
| . 6 2 | . 4 . | . . . |
| 3 . 4 | . 5 . | . 1 . |
+-------+-------+-------+
| . . . | 5 . 4 | . . 6 |
| 6 . 3 | 2 . 8 | 5 . 7 |
| 8 . . | 9 . 3 | . . . |
+-------+-------+-------+
| . 7 . | . 8 . | 2 . 1 |
| . . . | . 2 . | 4 6 . |
| . . . | . . . | . . 8 |
+-------+-------+-------+
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Play this puzzle online at the Daily Sudoku site |
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Marty R.
Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA
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| Posted: Sat Feb 16, 2008 4:45 pm Post subject: |
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| There was a Type 4 UR on 24 and a W-Wing on 39 solved it. |
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Victor
Joined: 29 Sep 2005
Posts: 207
Location: NI
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| Posted: Sat Feb 16, 2008 5:29 pm Post subject: |
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| Earl, that's a new one on me. What are hidden trips? (Sounds like 60s LSD or something!) |
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storm_norm
Joined: 18 Oct 2007
Posts: 1741
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| Posted: Sat Feb 16, 2008 8:12 pm Post subject: |
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hidden trip wires...
maybe war veteran slang?? |
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storm_norm
Joined: 18 Oct 2007
Posts: 1741
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| Posted: Sat Feb 16, 2008 8:17 pm Post subject: |
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xyz-wing
UR
then coloring on 9 |
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keith
Joined: 19 Sep 2005
Posts: 3355
Location: near Detroit, Michigan, USA
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| Posted: Sat Feb 16, 2008 9:36 pm Post subject: |
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Hidden triples?
I used a UR and the skyscraper.
Keith |
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Marty R.
Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA
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| Posted: Sat Feb 16, 2008 10:03 pm Post subject: |
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| storm_norm wrote: | hidden trip wires...
maybe war veteran slang?? |
Hopefully he'll explain. In my old poker-playing days, three of a kind were called "trips", so maybe he means hidden triples. |
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keith
Joined: 19 Sep 2005
Posts: 3355
Location: near Detroit, Michigan, USA
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| Posted: Sat Feb 16, 2008 10:09 pm Post subject: |
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Here's a new one, for me: An extended triple.
Can you solve this in one move?
| Code: | +----------------+----------------+----------------+
| 1 89 5 | 678 39c 267 | 67 24 2349 |
| 7 6 2 | 13a 4 19b | 8-9 58 359 |
| 3 89 4 | 678 5 267 | 67 1 29 |
+----------------+----------------+----------------+
| 29 12 19 | 5 7 4 | 38 38 6 |
| 6 4 3 | 2 1 8 | 5 9 7 |
| 8 5 7 | 9 6 3 | 1 24 24 |
+----------------+----------------+----------------+
| 459 7 69 | 346 8 569 | 2 35 1 |
| 59 3 8 | 17 2 17 | 4 6 59 |
| 245 12 16 | 46 39d 56 | 39e 7 8 |
+----------------+----------------+----------------+
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abc in B2 is a triple. Any cell that sees all three cannot be <139>. We can extend c <39> to d and e. c and e are the same value. R2C7 cannot be <9>, the puzzle is solved!
Of course, abc is also a very useless XY-wing: Any cell that sees both b and c cannot be <9>.
[The UR on <24> is in R16C89. It takes out <24> in R1C9.
Th skyscraper on <9> is in C57. It takes out <9> in R1C9.]
Keith |
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storm_norm
Joined: 18 Oct 2007
Posts: 1741
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| Posted: Sat Feb 16, 2008 11:07 pm Post subject: |
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| Marty R. wrote: | | storm_norm wrote: | hidden trip wires...
maybe war veteran slang?? |
Hopefully he'll explain. In my old poker-playing days, three of a kind were called "trips", so maybe he means hidden triples. |
yeah, you are right, I don't know where the trip wire thing came from. three of a kind is trips. |
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Johan
Joined: 25 Jun 2007
Posts: 206
Location: Bornem Belgium
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| Posted: Sat Feb 16, 2008 11:12 pm Post subject: |
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| The <9> in R2C7 can also be eliminated by the ER in Box 2 |
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