Online since 2002. Over 3300 puzzles, 2600 worldwide members, and 270,000 messages.

TwistyPuzzles.com Forum

It is currently Fri Apr 18, 2014 9:46 am

All times are UTC - 5 hours



Post new topic Reply to topic  [ 6 posts ] 
Author Message
 Post subject: Tip turning starminx parity
PostPosted: Wed Feb 15, 2012 10:26 pm 
Offline
User avatar

Joined: Thu Feb 02, 2012 10:57 pm
Location: Near the east coast, US
Not too long ago I purchased a tip turning starminx. I didn't have any trouble solving it intuitively the first time, but this was because I got lucky and avoided parity! The second time solving it I performed somewhat random moves when I ran into parity, but I don't really know how I did it. This time I have the same parity case, but I can't solve it for the life of me. Maybe one of you can help.

Here's a picture of the case mentioned.
Thanks in advance!

Image

I know the lighting is weird, but just to clarify, the two edges are in reverse orientation in their correct places.


Top
 Profile  
 
 Post subject: Re: Tip turning starminx parity
PostPosted: Wed Feb 15, 2012 10:55 pm 
Offline

Joined: Sun Oct 08, 2006 1:47 pm
Location: Houston/San Antonio, Texas
Well how much help did you want here? A straight-forward algorithm or just some intuition?

The interesting thing to notice on this puzzle is that any time an edge travels completely around a face and ends in the same spot that it started, it flips orientation.

What you need to do here is find a way to take one of those flipped edges all the way around a face center, and then put the other edge in its place and take it backwards along the same route, fixing everything you messed up with the first piece and simultaneously flipping it as well.

I would honestly try at it a bit longer before you ask for an algorithm, this situation isn't very hard :wink:

Good Luck!
-Matt Galla


Top
 Profile  
 
 Post subject: Tip turning starminx parity
PostPosted: Thu Feb 16, 2012 1:08 pm 
Offline
User avatar

Joined: Tue Mar 24, 2009 12:52 pm
Image
It is not parity. It is two 3-cycles and intermediate turns:
(2 1' 2' 1) 5 4 (2' 3 2 3') 4' 5'.


Top
 Profile  
 
 Post subject: Re: Tip turning starminx parity
PostPosted: Fri Feb 17, 2012 7:01 am 
Offline

Joined: Sat Jan 15, 2011 10:22 am
I swap them with a 3-cycle, bring one piece to the other side of the other one, and do a 3-cycle again. it's such an easy puzzle :D


Top
 Profile  
 
 Post subject: Re: Tip turning starminx parity
PostPosted: Tue Feb 19, 2013 2:54 pm 
Offline
User avatar

Joined: Thu Feb 02, 2012 10:57 pm
Location: Near the east coast, US
In hind sight I have no Idea how this case gave me trouble. Thanks anyways fellas, ha :)


Top
 Profile  
 
 Post subject: Re: Tip turning starminx parity
PostPosted: Tue Feb 19, 2013 6:21 pm 
Offline
User avatar

Joined: Tue Sep 11, 2012 1:51 pm
Location: Bedford, England
I actually just take both flipped pieces all the way around the face at the same time, in opposite directions, swapping over when they meet, and this fixes it, leaves me with one 3-cycle to solve.

_________________
My youtube channel: http://www.youtube.com/user/martywolfman?feature=plcp

Latest videos: Unboxing / Review of Curvy copter Plus, David Gear Cube, Octo-star Cube


Top
 Profile  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 6 posts ] 

All times are UTC - 5 hours


Who is online

Users browsing this forum: No registered users and 3 guests


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Search for:
Jump to:  

Forum powered by phpBB © 2000, 2002, 2005, 2007 phpBB Group