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cgordon
Joined: 04 May 2007
Posts: 769
Location: ontario, canada
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 Posted: Sun Jun 22, 2008 11:30 am Post subject: June 22, VH |
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How come I'm first this late in the day?
Did it with two ERs. One on <4> using C9/B7) gets rid of the <4> in R5C2. One one <5> (C9/B7) gets rid of the <5> in the same cell. Easy going from there. |
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nataraj
Joined: 03 Aug 2007
Posts: 1048
Location: near Vienna, Austria
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| Posted: Sun Jun 22, 2008 12:13 pm Post subject: Re: June 22, VH |
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| cgordon wrote: | How come I'm first this late in the day?
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Perfect weather ... lots to do on a beautiful Sunday morning ... never even turned on the PC... ah, "real" life !
Now, after a very nice meal (spaghetti with pesto, hmmmm delicious!), time to exercise the brain ...
In this position,
| Code: |
+--------------------------+--------------------------+--------------------------+
| 1 8 345 | 7 36 356 | 69 4569 2 |
| 9 7 35 | 4 2 356 | 8 56 1 |
| 45 6 2 | 8 9 1 | 45 7 3 |
+--------------------------+--------------------------+--------------------------+
| 3 1 46 | 69 5 48 | 2 489 7 |
| 456 245 9 | 26 38 7 | 1 38 45 |
| 8 245 7 | 29 1 34 | 39 3459 6 |
+--------------------------+--------------------------+--------------------------+
| 2 45 68 | 3 7 68 | 45 1 9 |
| 7 9 1 | 5 4 2 | 36 36 8 |
| 456 3 4568 | 1 68 9 | 7 2 45 |
+--------------------------+--------------------------+--------------------------+
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two overlapping xy-wings (46-48-68, 68-46-48 ) in boxes 4 and 5.
Later, two xyz-wings (4,5,6 and/or 2,4,5 in box 4)
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Johan
Joined: 25 Jun 2007
Posts: 206
Location: Bornem Belgium
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| Posted: Sun Jun 22, 2008 12:56 pm Post subject: |
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I used the <45> remote pair(abcd) to eliminate <45> in R9C1.
| Code: | +--------------------------+-------------------------+-------------------------+
| 1 8 345 | 7 36 356 | 69 4569 2 |
| 9 7 35 | 4 2 356 | 8 56 1 |
| 45 a 6 2 | 8 9 1 | 45 b 7 3 |
+--------------------------+-------------------------+-------------------------+
| 3 1 46 | 69 5 48 | 2 489 7 |
| 456 245 9 | 26 38 7 | 1 38 45 |
| 8 245 7 | 29 1 34 | 39 3459 6 |
+--------------------------+-------------------------+-------------------------+
| 2 45 68 | 3 7 68 | 45 c 1 9 |
| 7 9 1 | 5 4 2 | 36 36 8 |
|-[45]6 3 4568 | 1 68 9 | 7 2 d 45 |
+--------------------------+-------------------------+-------------------------+ |
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tlanglet
Joined: 17 Oct 2007
Posts: 2468
Location: Northern California Foothills
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| Posted: Sun Jun 22, 2008 1:12 pm Post subject: |
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| Code: | +--------------------------+-------------------------+-------------------------+
| 1 8 345 | 7 36 356 | 69 4569 2 |
| 9 7 35 | 4 2 356 | 8 56 1 |
| 45 6 2 | 8 9 1 | 45 7 3 |
+--------------------------+-------------------------+-------------------------+
| 3 1 46 | 69 5 48 | 2 489 7 |
| 456 2-[45} 9 | 26 38 7 | 1 38 45 d|
| 8 245 7 | 29 1 34 | 39 3459 6 |
+--------------------------+-------------------------+-------------------------+
| 2 45 a 68 | 3 7 68 | 45 b 1 9 |
| 7 9 1 | 5 4 2 | 36 36 8 |
|456 3 4568 | 1 68 9 | 7 2 45 c |
+--------------------------+-------------------------+-------------------------+ |
Johan, I used a second <45> Remote Pair(abcd) to shot the puzzle down.
Ted |
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keith
Joined: 19 Sep 2005
Posts: 3355
Location: near Detroit, Michigan, USA
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| Posted: Sun Jun 22, 2008 2:54 pm Post subject: |
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I used the remote pair. I think only one is needed.
Does draw / play use the remote pair, or does it go for the wings?
Keith |
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Marty R.
Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA
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| Posted: Sun Jun 22, 2008 3:31 pm Post subject: |
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| Ted's Remote Pairs was the only move needed. |
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Florida Bob
Joined: 25 Jul 2007
Posts: 12
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| Posted: Sun Jun 22, 2008 4:32 pm Post subject: |
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| I used the the 46-46-68 x-wing to eliminate the 6 in r7c3. This eventually exposed the ER in box 1 & 2 which broke the puzzle. |
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Johan
Joined: 25 Jun 2007
Posts: 206
Location: Bornem Belgium
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| Posted: Sun Jun 22, 2008 6:15 pm Post subject: |
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| Quote: | | Johan, I used a second <45> Remote Pair(abcd) to shot the puzzle down. |
Nice shot Ted |
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cgordon
Joined: 04 May 2007
Posts: 769
Location: ontario, canada
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| Posted: Sun Jun 22, 2008 9:19 pm Post subject: |
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Geez Guys: I've been around for a year or two but this is the first time I've heard of "Remote Pairs" - let alone seeing them given so much discussion in a forum.
I looked "Remote Pairs" up on one of the Sudoku sites and concluded this is NOT a good way to finish a puzzle. It's like colouring - it's a chain process. One step above guessing and seeing where the chain ends up.
I've see colouring cited more and more in recent posts. This is Ok for some of them "Other Puzzles" when no other standard VH solutions work. But in our VH's we can ALWAYS complete by using wings, UR's and Er's without having to resort to laborious and unsophisticated methods.
Be gentle with replies eh. |
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nataraj
Joined: 03 Aug 2007
Posts: 1048
Location: near Vienna, Austria
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| Posted: Mon Jun 23, 2008 4:49 pm Post subject: |
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| cgordon wrote: | ... without having to resort to laborious and unsophisticated methods.
Be gentle with replies eh. |
Being very gentle now  :
Beauty lies in the eye of the beholder.
variatio delectat. |
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storm_norm
Joined: 18 Oct 2007
Posts: 1741
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| Posted: Mon Jun 23, 2008 11:47 pm Post subject: |
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| cgordon wrote: | Geez Guys: I've been around for a year or two but this is the first time I've heard of "Remote Pairs" - let alone seeing them given so much discussion in a forum.
I looked "Remote Pairs" up on one of the Sudoku sites and concluded this is NOT a good way to finish a puzzle. It's like colouring - it's a chain process. One step above guessing and seeing where the chain ends up.
I've see colouring cited more and more in recent posts. This is Ok for some of them "Other Puzzles" when no other standard VH solutions work. But in our VH's we can ALWAYS complete by using wings, UR's and Er's without having to resort to laborious and unsophisticated methods.
Be gentle with replies eh. |
remote pairs will and should be your best friend in puzzles with a tiny bit more difficulty than these VHs. of course remote pairs often come in many varieties as seen over in the "other puzzles" section. |
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keith
Joined: 19 Sep 2005
Posts: 3355
Location: near Detroit, Michigan, USA
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| Posted: Tue Jun 24, 2008 3:59 am Post subject: |
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| cgordon wrote: | it's a chain process. One step above guessing and seeing where the chain ends up.
Be gentle with replies eh. |
I suppose I don't get it. X and Y are candidates, a, b, c, and d, denote cells that have X and Y as the only two candidates.
Naked pair XYa-XYb. No other cell in the same house (that sees both cells a and b) can be X or Y. Acceptable?
Remote pair XYa-XYb-XYc-XYd. No cell that sees both a and b, or b and c, or c and d, can be X or Y. Acceptable? No cell that sees both a and d can be X or Y. Unacceptable?
In the limit, a naked single (solved cell) is a chain of length zero (or one, depending on how you count, links or cells).
Exhaustive search ("guessing", to some) is a perfectly valid logical technique. Your opinion does not invalidate it.
My opinion on this has changed over the years. I used to think that any chain longer than an XY-wing was guessing. Now, I think that people see possible patterns and clues, and I should try to understand how they see them.
It's sort of like playing chess. You can think only two moves ahead, and regard all the rest as luck and guesswork. Or, you can figure out how to think three, then four, then ... moves ahead.
Gentle enough?
Keith |
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ravel
Joined: 21 Apr 2006
Posts: 536
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| Posted: Tue Jun 24, 2008 10:38 pm Post subject: |
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| nataraj wrote: | | Now, after a very nice meal (spaghetti with pesto, hmmmm delicious!), time to exercise the brain ... |
Oh, not my taste, students junk food in my mind - but with seafood "everything goes"
| cgordon wrote: | | I looked "Remote Pairs" up on one of the Sudoku sites and concluded this is NOT a good way to finish a puzzle. It's like colouring - it's a chain process. One step above guessing and seeing where the chain ends up. |
Didn't they jump into your eyes, more than a wing ? | Quote: | | Be gentle with replies eh. |
No problem here, as you can see.
| nataraj wrote: | | variatio delectat. |
Exactly my taste, variations of seafood |
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cgordon
Joined: 04 May 2007
Posts: 769
Location: ontario, canada
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| Posted: Tue Jun 24, 2008 10:56 pm Post subject: |
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| I will eat my French Canadian poutine (fries, cheese and gravy) and yield to those who are more cleverer than what I am. |
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nataraj
Joined: 03 Aug 2007
Posts: 1048
Location: near Vienna, Austria
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| Posted: Wed Jun 25, 2008 1:22 pm Post subject: |
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| ravel wrote: | | students junk food in my mind |
Not junk at all. Pesto is a delicious cold sauce. Here's the recipe (serves 2):
- 2 handful of fresh basil leaves, washed and chopped
- 50 g (gram) pignoli (pine nuts)
- 2-3 cloves of garlic
- 100 g Grana or Parmesan cheese, freshly grated from a whole piece
- 1 cup of extra vergine olive oil
- salt and black pepper
In a blender/food processor, grind the pignoli. add pressed garlic and the basil leaves. Alternate between pulsing the blender and adding cheese and olive oil.
Salt and pepper vigorously.
Put on top of the hot spaghetti.
Makes very thirsty, so careful with that Chianti!
enjoy |
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ravel
Joined: 21 Apr 2006
Posts: 536
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| Posted: Wed Jun 25, 2008 6:56 pm Post subject: |
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Thanks, my friend is interested - and we have living basil leaves (oh the cruel people, that amputate plants just for pleasure).
Maybe i take a half portion as a starter for grilled fish |
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storm_norm
Joined: 18 Oct 2007
Posts: 1741
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| Posted: Wed Jun 25, 2008 7:52 pm Post subject: |
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and who says sudoku isn't life  |
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keith
Joined: 19 Sep 2005
Posts: 3355
Location: near Detroit, Michigan, USA
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| Posted: Wed Jun 25, 2008 10:08 pm Post subject: |
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| ravel wrote: | Thanks, my friend is interested - and we have living basil leaves (oh the cruel people, that amputate plants just for pleasure).
Maybe i take a half portion as a starter for grilled fish |
ravel, try the pesto as a sauce for the grilled fish itself!
Keith |
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cgordon
Joined: 04 May 2007
Posts: 769
Location: ontario, canada
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| Posted: Thu Jun 26, 2008 11:37 am Post subject: |
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You can’t have fish without chips. And I’m not sure you can deep fry and batter fish properly when it’s been pestoed. Anyway, I live near Buffalo –famous for its wings (no colouring used).
Bon Appetite |
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