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Feb 16 VH

 
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Clement



Joined: 24 Apr 2006
Posts: 1111
Location: Dar es Salaam Tanzania

PostPosted: Mon Feb 15, 2010 10:31 pm    Post subject: Feb 16 VH Reply with quote

UR Type 1 <34> in r14c12 solves the puzzle.
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kragzy



Joined: 01 May 2007
Posts: 112
Location: Australia

PostPosted: Mon Feb 15, 2010 11:14 pm    Post subject: Reply with quote

And there's a good ol' XY wing (679) for those of us who, for no particular reason, prefer to avoid uniqueness solutions.
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arkietech



Joined: 31 Jul 2008
Posts: 1834
Location: Northwest Arkansas USA

PostPosted: Tue Feb 16, 2010 9:39 am    Post subject: Reply with quote

a w-wing 67 will also do it.
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Ema Nymton



Joined: 17 Apr 2009
Posts: 89

PostPosted: Tue Feb 16, 2010 12:30 pm    Post subject: Reply with quote

.

kragzy wrote:
And there's a good ol' XY wing (679) for those of us who, for no particular reason, prefer to avoid uniqueness solutions.



Code:

+-------------+---------------+-----------------+
| 2348 34 138 | 26  12678 678 | 9    1578 12357 |
| 28   6  5   | 9   1278  3   | 1278 4    127   |
| 9    7  138 | 5   128   4   | 6    18   123   |
+-------------+---------------+-----------------+
| 34   34 79A | 1   79*   2   | 5    6    8     |
| 1    8  67  | 36  4     5   | 37   2    9     |
| 5    2  679B| 8   3679  67C | 137  17   4     |
+-------------+---------------+-----------------+
| 78   9  2   | 4   5     1   | 78   3    6     |
| 368  1  38  | 7   2368  9   | 4    58   25    |
| 3678 5  4   | 236 2368  68  | 1278 9    127   |
+-------------+---------------+-----------------+

Are you referring to:
r4c3 (A), r4c5 (*), r6c3 (B), r6c6 (C)?
Must the XY Wing (679) removes the common digit '7' from r4c5?

~@:o|
.
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Ema Nymton



Joined: 17 Apr 2009
Posts: 89

PostPosted: Tue Feb 16, 2010 3:36 pm    Post subject: Reply with quote

.

Does r1c9, r2c9, r9c9 constitute a naked triple (127) and thus remove '1' and '2' from r3c9 and '2' from r8c9?

Ema
~@:o|

ps
Maybe I am beginning to get this..... ;-)
.
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Marty R.



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

PostPosted: Tue Feb 16, 2010 4:53 pm    Post subject: Reply with quote

Quote:
Does r1c9, r2c9, r9c9 constitute a naked triple (127) and thus remove '1' and '2' from r3c9 and '2' from r8c9?

Ema, sorry, there's no naked triple there. A naked triple would have to be three cells containing only the same three numbers, but there could be different number combinations. R1c9 has a 35 in it.

For example, a naked triple of 127 could look like:

12-17-27 or
127-27-12 or
17-127-127
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Wendy W



Joined: 04 Feb 2008
Posts: 144

PostPosted: Tue Feb 16, 2010 7:44 pm    Post subject: Reply with quote

Same as Clement, but I also needed a UR 13 after the UR 34.
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kragzy



Joined: 01 May 2007
Posts: 112
Location: Australia

PostPosted: Wed Feb 17, 2010 12:00 am    Post subject: Reply with quote

Quote:
Are you referring to:
r4c3 (A), r4c5 (*), r6c3 (B), r6c6 (C)?
Must the XY Wing (679) removes the common digit '7' from r4c5?


Hi Ema,

You're correct but you're not quite there yet. There is an X wing on 7 (cols 6&Cool that will take the 7 out of R6C3. This cell becomes 69 and is the pincer that takes the 7 out of R4C5.

Cheers
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kragzy



Joined: 01 May 2007
Posts: 112
Location: Australia

PostPosted: Wed Feb 17, 2010 12:04 am    Post subject: Reply with quote

That smiley should be '8'. Don't know how that happened; must be the computer, couldn't possibly be my typing skills!
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Marty R.



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

PostPosted: Wed Feb 17, 2010 12:45 am    Post subject: Reply with quote

kragzy wrote:
That smiley should be '8'. Don't know how that happened; must be the computer, couldn't possibly be my typing skills!

That happens frequently since some of the smileys are created from a number and a parenthesis. It's easily correctable, and I have to do it frequently. Just edit your post and then below the message box click the box to disable smileys in this particular post.
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kragzy



Joined: 01 May 2007
Posts: 112
Location: Australia

PostPosted: Wed Feb 17, 2010 1:28 am    Post subject: Reply with quote

Thanks Marty. The other mistake I made was saying that R6C3 becomes the pincer. It's actually the pivot. Not the computer, not my typing, just a fuzzy brain Confused (smiley intended!)
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Clement



Joined: 24 Apr 2006
Posts: 1111
Location: Dar es Salaam Tanzania

PostPosted: Wed Feb 17, 2010 7:27 pm    Post subject: Reply with quote

Wendy,

Yes, there was a UR 13 after the UR 34. However, it was not neccessary to use it, because, once you remove the 34 in r1c1 you get two naked pairs 28 in col 1 and 13 in col 3 which you can use any of them to complete the puzzle.
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gindaani



Joined: 06 Mar 2009
Posts: 79

PostPosted: Thu Feb 18, 2010 9:02 pm    Post subject: Reply with quote

I too like to avoid uniqueness based solutions.

The 679 xy-wing is actually two steps, 1) 7 x-wing 2) 679 xy-wing.

The 367 xy-wing is a one stepper that avoids uniqueness tests.
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