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Dec 7 vh

 
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nataraj



Joined: 03 Aug 2007
Posts: 1048
Location: near Vienna, Austria

PostPosted: Fri Dec 07, 2007 6:45 am    Post subject: Dec 7 vh Reply with quote

First choice after basics: xy-wing.
Either left side 41-16-64 or right side 97-76-69. Both lead to the same cells being solved.
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TexCat



Joined: 07 Jul 2006
Posts: 32

PostPosted: Fri Dec 07, 2007 7:55 am    Post subject: Reply with quote

After basic moves, I was done. I didn't seem to need any kind of wing.
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Johan



Joined: 25 Jun 2007
Posts: 206
Location: Bornem Belgium

PostPosted: Fri Dec 07, 2007 9:07 am    Post subject: Reply with quote

There is also a useless [16-56-15] xy-wing@, when using the two pincer

cells (either R5C1=1, R8C9=1, or both), which pins <4> in R3C1

Code:

+--------------------------+--------------------------+-------------------------+
| 2        69        5     | 3         69        7    | 8          1        4   |
| 167      167       3     | 4         8         16   | 25         25       9   |
| 14       149       8     | 15        2         59   | 6          3        7   |
+--------------------------+--------------------------+-------------------------+
| 47       8         79    | 6         5         3    | 1          49       2   |
|@16       3         169   | 7         4         2    | 59         8       @56  |
| 5        46        2     | 9         1         8    | 34         7        36  |
+--------------------------+--------------------------+-------------------------+
| 9        5         4     | 8         7         16   | 23         26       13  |
| 8        2         67    | 15        3         4    | 79         69      @15  |
| 3        167       167   | 2         69        59   | 457        456      8   |
+--------------------------+--------------------------+-------------------------+
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andras



Joined: 31 Oct 2007
Posts: 56
Location: Mid Wales

PostPosted: Fri Dec 07, 2007 10:34 am    Post subject: Reply with quote

Yes, I saw the 1-4-7 immediately, but remembered to wait until I could get a copy of the puzzle at that point before I moved on. Smile

Now I'll see if I can spot any ERs on it!

John
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cgordon



Joined: 04 May 2007
Posts: 769
Location: ontario, canada

PostPosted: Fri Dec 07, 2007 3:24 pm    Post subject: Reply with quote

Took me forever to find the <146> x wing - which is why I don't like em. Looked for ERs - never found none. But there's no straight-through basic solution Texcat - you must have erred.
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Marty R.



Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA

PostPosted: Fri Dec 07, 2007 4:11 pm    Post subject: Reply with quote

Johan wrote:
There is also a useless [16-56-15] xy-wing@, when using the two pincer

cells (either R5C1=1, R8C9=1, or both), which pins <4> in R3C1

Code:

+--------------------------+--------------------------+-------------------------+
| 2        69        5     | 3         69        7    | 8          1        4   |
| 167      167       3     | 4         8         16   | 25         25       9   |
| 14       149       8     | 15        2         59   | 6          3        7   |
+--------------------------+--------------------------+-------------------------+
| 47       8         79    | 6         5         3    | 1          49       2   |
|@16       3         169   | 7         4         2    | 59         8       @56  |
| 5        46        2     | 9         1         8    | 34         7        36  |
+--------------------------+--------------------------+-------------------------+
| 9        5         4     | 8         7         16   | 23         26       13  |
| 8        2         67    | 15        3         4    | 79         69      @15  |
| 3        167       167   | 2         69        59   | 457        456      8   |
+--------------------------+--------------------------+-------------------------+


Johan, did you leave out some words? The two pincers eliminate nothing. But color the pincer from r8c9-->r8c4-->r3c4 and the new pincer in r3c4 combines with the other original pincer in r5c1 to knock out the 1 from r3c1.
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Clement



Joined: 24 Apr 2006
Posts: 1110
Location: Dar es Salaam Tanzania

PostPosted: Fri Dec 07, 2007 6:53 pm    Post subject: Fri 7-Dec-2007 VH Reply with quote

Could be solved by XY-Wing {1,6} as a pivot in r5c1 and {1,4}r3c1 {4,6}r6c2 as pincers removing the 4 in r3c2.
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storm_norm



Joined: 18 Oct 2007
Posts: 1741

PostPosted: Fri Dec 07, 2007 7:08 pm    Post subject: Reply with quote

just scanning and pencil marks made this puzzle quite fun.
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Johan



Joined: 25 Jun 2007
Posts: 206
Location: Bornem Belgium

PostPosted: Sat Dec 08, 2007 10:53 am    Post subject: Reply with quote

Quote:
Johan, did you leave out some words? The two pincers eliminate nothing. But color the pincer from r8c9-->r8c4-->r3c4 and the new pincer in r3c4 combines with the other original pincer in r5c1 to knock out the 1 from r3c1.


Marty,

I thought with the two strong links on <1> in R8 and C4, it wasn't too

difficult to spot, extending the R8C9 pincer, but you're right I should have

mentioned that when

R8C9=1, then R8C4=5 and R3C4=1, eliminating <1> in R3C1,
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Marty R.



Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA

PostPosted: Sat Dec 08, 2007 3:38 pm    Post subject: Reply with quote

Johan wrote:
Quote:
Johan, did you leave out some words? The two pincers eliminate nothing. But color the pincer from r8c9-->r8c4-->r3c4 and the new pincer in r3c4 combines with the other original pincer in r5c1 to knock out the 1 from r3c1.


Marty,

I thought with the two strong links on <1> in R8 and C4, it wasn't too

difficult to spot, extending the R8C9 pincer, but you're right I should have

mentioned that when

R8C9=1, then R8C4=5 and R3C4=1, eliminating <1> in R3C1,


Johan, you're correct, it's easy to spot if you know the technique. Personally, I just learned about coloring pincers a few months ago; I have to assume there are others reading this forum who might not yet have learned it. Very Happy
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TexCat



Joined: 07 Jul 2006
Posts: 32

PostPosted: Sun Dec 09, 2007 7:37 pm    Post subject: Reply with quote

cgordon wrote:
But there's no straight-through basic solution Texcat - you must have erred.

When I finished the puzzle, I thought I must have done something wrong and then did it again. I must have made the same mistake the second time, because it was just as straightforward. I'll be darned if I can do it now a third time though. Confused
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