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April 9 VH

 
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Clement



Joined: 24 Apr 2006
Posts: 1113
Location: Dar es Salaam Tanzania
PostPosted: Fri Apr 08, 2011 10:35 pm    Post subject: April 9 VH Reply with quote
W-Wing 13 in rows 6 & 7 with SL 1 in col 7 solves it.
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Marty R.



Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA
PostPosted: Sat Apr 09, 2011 1:15 am    Post subject: Reply with quote
This was one of those that offered numerous possibilities. W-Wings, as Clement noted, plus Coloring, Skyscrapers and XY-Chains.
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mackem



Joined: 09 Apr 2011
Posts: 5
Location: Thailand
PostPosted: Sat Apr 09, 2011 10:08 am    Post subject: April 9 Reply with quote
I was able to solve this puzzle by straight forward logic. I don't understand W-Wings , XYZ Wings and Pivots etc. Where can I find out about these please Question
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Ema Nymton



Joined: 17 Apr 2009
Posts: 89
PostPosted: Sat Apr 09, 2011 12:42 pm    Post subject: Re: April 9 Reply with quote
.

mackem wrote:
I was able to solve this puzzle by straight forward logic. I don't understand W-Wings , XYZ Wings and Pivots etc. Where can I find out about these please :?:


Many places are helpful. One powerful tool can be found:

http://www.brainbashers.com/sudokuhelp.asp

Ema Nymton
.
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kuskey



Joined: 10 Dec 2008
Posts: 141
Location: Pembroke, NH
PostPosted: Sat Apr 09, 2011 3:20 pm    Post subject: 9 Apr VH Reply with quote
Also a 138 XY-Wing pivot r7c4 setting r9c4 and r4c5<>8 solves it.
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mackem



Joined: 09 Apr 2011
Posts: 5
Location: Thailand
PostPosted: Sun Apr 10, 2011 1:54 am    Post subject: Reply with quote
Thanks Ema. Very helpful. Hopefully one day I'll be able to understand it! Very Happy
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hughwill



Joined: 05 Apr 2010
Posts: 424
Location: Birmingham UK
PostPosted: Mon Apr 11, 2011 5:09 pm    Post subject: April 9 VH Reply with quote
Hi Mackem

Just to say that Ema might not be his/her real name.... Smile
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mackem



Joined: 09 Apr 2011
Posts: 5
Location: Thailand
PostPosted: Tue Apr 12, 2011 11:15 am    Post subject: Reply with quote
Hi Hughwill. Thanx for the tip. Mackem might not be my real name either! Wink
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prakash



Joined: 02 Jan 2008
Posts: 67
Location: New Jersey, USA
PostPosted: Mon May 09, 2011 1:54 am    Post subject: Reply with quote
I hate to say this, since I am not too thrilled by UR solutions, but there is a type 3 UR on 39 which eliminates 1 in r3c5.
-PJ
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