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Earl
Joined: 30 May 2007
Posts: 677
Location: Victoria, KS
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 Posted: Thu Mar 12, 2009 2:56 am Post subject: March 12 VH |
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Did not find a single bullet. Double barrel - X-wing (3), xy-wing (139).
Early Earl
PS Norm, please prove me wrong.
Last edited by Earl on Thu Mar 12, 2009 2:12 pm; edited 1 time in total |
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Marty R.
Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA
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| Posted: Thu Mar 12, 2009 4:46 am Post subject: |
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Same two steps.
Tardy Marty. |
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crunched
Joined: 05 Feb 2008
Posts: 168
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| Posted: Thu Mar 12, 2009 6:11 am Post subject: |
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Here is the grid after basics.
I did not see a 1-3-9 xy wing.
After the x-wing of 3s (c3,6), an xy wing of 1-3-8 opened up in boxes 7,8.
| Code: |
+----------------+------------+--------------+
| 1 5 346 | 2 9 36 | 7 8 46 |
| 239 2369 34679 | 38 178 136 | 5 1469 46 |
| 8 69 679 | 5 17 4 | 19 3 2 |
+----------------+------------+--------------+
| 5 1 8 | 4 3 2 | 6 7 9 |
| 6 39 39 | 1 5 7 | 24 24 8 |
| 7 4 2 | 9 6 8 | 3 5 1 |
+----------------+------------+--------------+
| 4 7 139 | 6 18 139 | 1289 129 5 |
| 29 2689 169 | 7 4 5 | 1289 1269 3 |
| 39 3689 5 | 38 2 139 | 1489 1469 7 |
+----------------+------------+--------------+
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Play this puzzle online at the Daily Sudoku site
After the x-wing on 3s, here is what I get. There is also an xy wing 1-6-7 that removes some 6s in box 1, as well.
Now... I also see the 1-3-9 wing too. Hum...more than one way to solve this with xy wings.
| Code: |
+---------------+------------+--------------+
| 1 5 346 | 2 9 36 | 7 8 46 |
| 239 269 3467 | 38 178 16 | 5 1469 46 |
| 8 69 67 | 5 17 4 | 19 3 2 |
+---------------+------------+--------------+
| 5 1 8 | 4 3 2 | 6 7 9 |
| 6 3 9 | 1 5 7 | 24 24 8 |
| 7 4 2 | 9 6 8 | 3 5 1 |
+---------------+------------+--------------+
| 4 7 13 | 6 18 139 | 1289 129 5 |
| 29 2689 16 | 7 4 5 | 1289 1269 3 |
| 39 689 5 | 38 2 19 | 1489 1469 7 |
+---------------+------------+--------------+
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Play this puzzle online at the Daily Sudoku site |
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cgordon
Joined: 04 May 2007
Posts: 769
Location: ontario, canada
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| Posted: Thu Mar 12, 2009 12:36 pm Post subject: |
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| I think you chaps missed something basic - all I needed was the x-wing on <3>. I'll try it again - and if I'm right you'll hear about it. |
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crunched
Joined: 05 Feb 2008
Posts: 168
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| Posted: Thu Mar 12, 2009 1:43 pm Post subject: |
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| cgordon wrote: | | I think you chaps missed something basic - all I needed was the x-wing on <3>. I'll try it again - and if I'm right you'll hear about it. |
What will we hear if you are wrong? |
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cgordon
Joined: 04 May 2007
Posts: 769
Location: ontario, canada
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| Posted: Thu Mar 12, 2009 2:26 pm Post subject: |
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| I’m not saying I was necessarily wrong …there was a one step solution when I first did it. |
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stevieboy
Joined: 25 Jan 2008
Posts: 31
Location: Michigan
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| Posted: Thu Mar 12, 2009 2:41 pm Post subject: |
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| Code: | +---------------+------------+--------------+
| 1 5 346 | 2 9 36 | 7 8 46 |
| 239 269 3467 | 38 178 16 | 5 1469 46 |
| 8 69 67 | 5 17 4 | 19 3 2 |
+---------------+------------+--------------+
| 5 1 8 | 4 3 2 | 6 7 9 |
| 6 3 9 | 1 5 7 | 24 24 8 |
| 7 4 2 | 9 6 8 | 3 5 1 |
+---------------+------------+--------------+
| 4 7 13 | 6 18 139 | 1289 129 5 |
| 29 2689 16 | 7 4 5 | 1289 1269 3 |
| 39 689 5 | 38 2 19 | 1489 1469 7 |
+---------------+------------+--------------+ |
xy-wing (138) - Boxes 7 and 8...that did it for me! |
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cgordon
Joined: 04 May 2007
Posts: 769
Location: ontario, canada
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| Posted: Thu Mar 12, 2009 4:59 pm Post subject: |
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Well done Stevieboy. (Not sure how you got rid of the 3 in R9C6 but that doesn't matter).
There is also an x-wing on <6> which leaves a Type 6 UR on 29 in C12.
Not a one-stepper - but still pretty damn impressive. |
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swando
Joined: 09 Mar 2009
Posts: 17
Location: Surrey, BC. Canada
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| Posted: Thu Mar 12, 2009 6:42 pm Post subject: |
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| I used 2 xy'x 239 and 139 |
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stevieboy
Joined: 25 Jan 2008
Posts: 31
Location: Michigan
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| Posted: Thu Mar 12, 2009 11:52 pm Post subject: |
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Thanks, cgordon!
Actually, the "code" sudoku that I presented before my little one-line solution was not the real board that I was faced with! I neglected to copy what I was actually faced with, before I discovered the xy-wing!! (bad me!)
However, my Boxes 7 and 8 were close, if not exact to what I showed...all I know is that I was at a stage where the xy-wing eliminated all the candidates necessary to solve the puzzle.
That's always a relief!
By the way, I always enjoy reading how you "experts" come up with your solutions...I'm a relative newcomer, who knows just enough tricks to be able to solve the "very-hards"...it's the "hards" that tend to stump me!! Funny how that is! |
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storm_norm
Joined: 18 Oct 2007
Posts: 1741
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| Posted: Fri Mar 13, 2009 12:33 am Post subject: |
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| Quote: | | PS Norm, please prove me wrong. |
whew,
its bleeding into the daily puzzle threads.
that isn't fair.
I was told on numerous occasions in other threads that an alternative solution to these VH puzzles is "crazy" and "looney".
if a Daily VH puzzle needs but a x-wing and a xy-wing to solve then the argument can be made as to why there need be any search for something more. right?
that is the argument that was presented to me in the past.
I remember nataraj making the point to me in the past, saying how using medusa on a VH daily puzzle would be like bringing a back hoe to a sand box, HA ! 
ehem...
the second argument... is that a single step solution to this particular puzzle wouldn't employ a chain/pattern/structure that has a "easy-to-remember-name" given to it so that other people would readily find it in the future.
kind of like this chain...
just in case you wanted to know.
single stepper alert
| Code: | .------------------.------------------.------------------.
| 1 5 34 | 2 9 36 | 7 8 46 |
| 239 239 3479 |C38 B178 136 | 5 19 46 |
| 8 69 679 | 5 17 4 | 19 3 2 |
:------------------+------------------+------------------:
| 5 1 8 | 4 3 2 | 6 7 9 |
| 6 39 39 | 1 5 7 | 24 24 8 |
| 7 4 2 | 9 6 8 | 3 5 1 |
:------------------+------------------+------------------:
| 4 7 G-139 | 6 A18 139 | 1289 129 5 |
| 29 2689 169 | 7 4 5 | 189 169 3 |
|E39 F3689 5 |D38 2 139 | 1489 1469 7 |
'------------------'------------------'------------------' |
(1=8}A - (8}B = (8-3)C = (3)D - (3)EF = (3)G; G <> 1
I stop the chain at r7c3... and I find that either G is 3 or A is 1
in either case, G cannont be 1 so it can be eliminated.
----
upon further review...
the chain can be shortened
(1=8}A - (8=3)D - (3)EF = (3)G
there you go Earl, a three strong link move to blast it. |
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nataraj
Joined: 03 Aug 2007
Posts: 1048
Location: near Vienna, Austria
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| Posted: Fri Mar 13, 2009 5:08 pm Post subject: |
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| storm_norm wrote: |
I remember nataraj making the point to me in the past, saying how using medusa on a VH daily puzzle would be like bringing a back hoe to a sand box, HA !
ehem...
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I'd completely forgotten, but now I remember, too ...
Speaking of heavy equipment ...
porzellan: china
The bubble reads: "O my god, he's BACK! And he's bought that THING!!!" |
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