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andras
Joined: 31 Oct 2007
Posts: 56
Location: Mid Wales
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 Posted: Wed Mar 12, 2008 12:39 pm Post subject: VH March 12 |
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Another nice one; an x-y on 4,6,9 solved it for me.
John |
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sdq_pete
Joined: 30 Apr 2007
Posts: 119
Location: Rotterdam, NL
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| Posted: Wed Mar 12, 2008 12:58 pm Post subject: |
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Same here
Peter |
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tlanglet
Joined: 17 Oct 2007
Posts: 2468
Location: Northern California Foothills
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| Posted: Wed Mar 12, 2008 1:43 pm Post subject: |
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Ditto! 
Ted |
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Earl
Joined: 30 May 2007
Posts: 677
Location: Victoria, KS
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| Posted: Wed Mar 12, 2008 1:52 pm Post subject: VH |
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A w-wing (69) sovled it for me.
Earl |
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cgordon
Joined: 04 May 2007
Posts: 769
Location: ontario, canada
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| Posted: Wed Mar 12, 2008 2:53 pm Post subject: |
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| Quote: | | Another nice one; an x-y on 4,6,9 solved it for me. |
It would solve it for me - if I could find it. Give me a clue - where's the pivot?
I'm actually slower than normal today cos I've been away in Italy for 6 weeks. I didn't bother doing sudokus there - I don't speak Italian. |
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Marty R.
Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA
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| Posted: Wed Mar 12, 2008 3:16 pm Post subject: |
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Welcome back Craig.
This is where I found myself after the basics:
| Code: |
+-----------+--------------+----------+
| 1 9 6 | 2 3 4 | 5 8 7 |
| 48 5 7 | 1689 69 1689 | 46 3 2 |
| 2 34 348 | 68 5 7 | 1 49 69 |
+-----------+--------------+----------+
| 5 1 2 | 4 7 3 | 9 6 8 |
| 48 7 48 | 69 2 69 | 3 1 5 |
| 3 6 9 | 58 1 58 | 7 2 4 |
+-----------+--------------+----------+
| 6 34 5 | 7 8 19 | 2 49 13 |
| 9 2 34 | 156 46 156 | 8 7 13 |
| 7 8 1 | 3 49 2 | 46 5 69 |
+-----------+--------------+----------+
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Play this puzzle online at the Daily Sudoku site
This is a good practice puzzle for those who may need to familiarize themselves with some techniques which are commonly discussed here. There are at least two W-Wings on 69, one of which is unproductive. There are at least four XY-Wings involving the 469 combination, two of which involve pincer coloring. There are at least two coloring chains on 4.
Finally, for those who don't use Medusa, but would like to get started, this is also a good one to start with. |
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ravel
Joined: 21 Apr 2006
Posts: 536
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| Posted: Wed Mar 12, 2008 4:52 pm Post subject: |
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I see 2 xy-wings - in the same 4 cells,
2 w-wings 69 with the same pairs - but different strong links,
another w-wing 69 with another cell - linked by the other number,
and a w-wing 46,
that all solve the puzzle.
And an x-wing, that does not solve it. |
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cgordon
Joined: 04 May 2007
Posts: 769
Location: ontario, canada
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| Posted: Wed Mar 12, 2008 5:55 pm Post subject: |
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Marty: As I mentioned, I'm just back from Italy where the wine is cheap and plentiful. Trouble is - it destroys brain cells. Where is the xy wing for 469 on your grid (not the colouring ones).
Craig |
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Clement
Joined: 24 Apr 2006
Posts: 1111
Location: Dar es Salaam Tanzania
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| Posted: Wed Mar 12, 2008 6:14 pm Post subject: Wed 12-Mar-2008 VH |
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| XY-Wing pivot {4,9}r9c5 with pincers {4,6}r9c7 and {6,9}r2c5 eliminating 6 in {4,6}r2c7 solves the puzzle. |
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Marty R.
Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA
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| Posted: Wed Mar 12, 2008 6:27 pm Post subject: |
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| cgordon wrote: | Marty: As I mentioned, I'm just back from Italy where the wine is cheap and plentiful. Trouble is - it destroys brain cells. Where is the xy wing for 469 on your grid (not the colouring ones).
Craig |
Craig, Clement described one of them. There's also one pivoted in r3c5 with pincers in r9c5 and r2c7. The one pivoted in r2c7 with pincers in r2c5 and r3c8 doesn't make any direct eliminations, but either of the pincers on 9 can be colored to take out 9s. Lots of 469s scattered around the grid. |
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cgordon
Joined: 04 May 2007
Posts: 769
Location: ontario, canada
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| Posted: Wed Mar 12, 2008 6:45 pm Post subject: |
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| ....seems I missed taking out the 6 in r9c5. I'll be better tomorrow. |
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keith
Joined: 19 Sep 2005
Posts: 3355
Location: near Detroit, Michigan, USA
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| Posted: Wed Mar 12, 2008 9:02 pm Post subject: |
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| cgordon wrote: | | I'm actually slower than normal today cos I've been away in Italy for 6 weeks. I didn't bother doing sudokus there - I don't speak Italian. |
There's not a web site that translates puzzles from Italian to English?
Keith |
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crunched
Joined: 05 Feb 2008
Posts: 168
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| Posted: Wed Mar 12, 2008 10:32 pm Post subject: |
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| whoo boy...a sudoku puzzle in Roman...no thanks!!! These puzzles in Arabic are plenty for me. |
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storm_norm
Joined: 18 Oct 2007
Posts: 1741
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| Posted: Wed Mar 12, 2008 11:23 pm Post subject: |
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who was it that asked if xy-chains are dishonorable??
not according to daily sudoku...
ditto on the xy-wing a.k.a. 3 cell xy-chain |
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cgordon
Joined: 04 May 2007
Posts: 769
Location: ontario, canada
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| Posted: Wed Mar 12, 2008 11:33 pm Post subject: |
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| Quote: | | whoo boy...a sudoku puzzle in Roman...no thanks!!! |
That's interesting. Can you imagine a forum for sudokus in Roman.
"There's an xy wing at IX, VII, IV" |
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nataraj
Joined: 03 Aug 2007
Posts: 1048
Location: near Vienna, Austria
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| Posted: Thu Mar 13, 2008 8:04 pm Post subject: |
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They had sudoku for sure in Rome,
Horace wrote:
"dulce et decorum est
pro sudoku mori"
Or Mark Anthony:
"friends, Romans, countrymen, lend me your hands!
I want to bury Cesar and get on with today's puzzle" |
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Mindwarp
Joined: 13 Sep 2007
Posts: 25
Location: St. Ives, England
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| Posted: Fri Mar 14, 2008 12:33 am Post subject: |
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Just imagine the pencil marks in Roman numerals!!!   |
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storm_norm
Joined: 18 Oct 2007
Posts: 1741
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| Posted: Fri Mar 14, 2008 9:02 pm Post subject: |
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| Mindwarp wrote: | | Just imagine the pencil marks in Roman numerals!!! |
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ravel
Joined: 21 Apr 2006
Posts: 536
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| Posted: Fri Mar 14, 2008 9:47 pm Post subject: |
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| nataraj wrote: | "dulce et decorum est
pro sudoku mori" |
Ave, Sudoku, morituri te salutant  |
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