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Geender

Post subject: Help me solve the pyraminx crystal. Posted: Wed Oct 13, 2010 8:45 am 

Joined: Sun Dec 27, 2009 3:44 pm

Hey guys, i started to solve the pyraminx crystal i met the "flip" problem. i need 1 algoritem to change this edge with this edge without a "flip".
Thanks!
Geender
Attachments: 
pyraminx crystal.JPG [ 11.36 KiB  Viewed 1926 times ]



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Konrad

Post subject: Re: Help me solve the pyraminx crystal. Posted: Wed Oct 13, 2010 9:21 am 

Joined: Thu Sep 17, 2009 6:07 am Location: Germany, Bavaria

Your picture looks a bit blurred, but from what I can recognize there are several edges still not at the right location and correctly oriented, right? Why do you not place other edges first? If you insist, doing the one you have indicated first, whithout flipping, just flip it twice: bring it to the right flipped and do that again.
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Katja

Post subject: Re: Help me solve the pyraminx crystal. Posted: Wed Oct 13, 2010 9:32 am 

Joined: Tue Feb 16, 2010 12:15 pm Location: Sandnes, Norway

I have to agree with konsassen. I wouldn't worry about getting a "bad case" until I had solved all edges so that there's only unsolved edges on one single face. I actually don't know any specific commutators for fixing difficult cases on the Pyraminx Crystal, as I've found that most of them can be fixed rather easily by repeating a simple 3cycle of the edges.


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Geender

Post subject: Re: Help me solve the pyraminx crystal. Posted: Wed Oct 13, 2010 10:07 am 

Joined: Sun Dec 27, 2009 3:44 pm

its in my 3 layer...
how am i flipp it!?
Geender
Attachments: 
pyraminx crystal.JPG [ 8.71 KiB  Viewed 1905 times ]



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Konrad

Post subject: Re: Help me solve the pyraminx crystal. Posted: Wed Oct 13, 2010 10:35 am 

Joined: Thu Sep 17, 2009 6:07 am Location: Germany, Bavaria


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pytlivyj_1

Post subject: Help me solve the pyraminx crystal. Posted: Wed Oct 13, 2010 10:50 am 

Joined: Tue Mar 24, 2009 12:52 pm

Geender wrote: Hey guys, i started to solve the pyraminx crystal i met the "flip" problem. i need 1 algoritem to change this edge with this edge without a "flip".
Thanks!
Geender Violet  F, orange  R, dark green  L, red  D. Rotate so: (D2 R D' R' D) (L R' L' R) (D' R D R' D'')The explanatories to algorithm of a 3cycle: 1. Intermediate rotations: (D2 R D' R' D); 2. The basic rotations: (L R' L' R); 3. Intermediate rotations in the return order: (D' R D R' D''). Good luck!


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Konrad

Post subject: Re: Help me solve the pyraminx crystal. Posted: Wed Oct 13, 2010 12:54 pm 

Joined: Thu Sep 17, 2009 6:07 am Location: Germany, Bavaria

Setup moves make your life difficult. (In this case 5 moves). I find myself often not remembering setup moves when it comes to inversing them. Try to do as many edges as possible without too many setup moves. Good luck!
_________________ My collection at: http://sites.google.com/site/twistykon/home
Last edited by Konrad on Sun Nov 28, 2010 2:59 pm, edited 1 time in total.


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Brandon Enright

Post subject: Re: Help me solve the pyraminx crystal. Posted: Wed Oct 13, 2010 2:24 pm 

Joined: Thu Dec 31, 2009 8:54 pm Location: Bay Area, California

Geender wrote: its in my 3 layer...
how am i flipp it!?
Geender Hi Geender, it's actually impossible to flip just a single edge without also flipping another edge because of an orientation parity restriction on faceturning puzzles like the Pyraminx Crystal. To flip two edges, there was a discussion about how to do it here. You can flip two edges on the same face across from each other in only 8 moves via [F], [C2,G'2,C2], [F'], [C'2,G2,C'2] (Gelatinbrain's notation). I haven't proved that this is an optimal sequence but I'm almost certain that it is. As everybody else has said, you should probably solve the edges topdown until only the 5 edges in the last layer remain before worrying about specific orientation fixing routines.
_________________ Prior to using my real name I posted under the account named bmenrigh.


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Luke

Post subject: Re: Help me solve the pyraminx crystal. Posted: Thu Oct 14, 2010 1:29 am 

Joined: Thu Sep 24, 2009 12:21 pm Location: Chichester, England

I personally find it easier to do the corners as you go along with the edges. That way, you're not just restricted to simple 4 move algorithms, but can move around instead. And I think you say that it has a parity is like saying that there's partity on a 3x3x3 when there are 2 edges swapped.
_________________ 3x3x3 single: 5.73 seconds. 3x3x3 average of five: 8.92 seconds. 3x3x3 average of twelve: 9.77 seconds.
Buy the Curvy Copter Skewb, NovaMinx, and more here!


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Geender

Post subject: Re: Help me solve the pyraminx crystal. Posted: Sun Oct 17, 2010 2:28 pm 

Joined: Sun Dec 27, 2009 3:44 pm

pytlivyj_1 wrote: Geender wrote: Hey guys, i started to solve the pyraminx crystal i met the "flip" problem. i need 1 algoritem to change this edge with this edge without a "flip".
Thanks!
Geender Violet  F, orange  R, dark green  L, red  D. Rotate so: (D2 R D' R' D) (L R' L' R) (D' R D R' D'')The explanatories to algorithm of a 3cycle: 1. Intermediate rotations: (D2 R D' R' D); 2. The basic rotations: (L R' L' R); 3. Intermediate rotations in the return order: (D' R D R' D''). Good luck! wow its really helpfull! thank you! can you give another algoritem for 2 last edeges flip? Thanks Guys!!


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pytlivyj_1

Post subject: Help me solve the pyraminx crystal. Posted: Mon Oct 18, 2010 1:03 pm 

Joined: Tue Mar 24, 2009 12:52 pm

Last two edges I develop by the same way: 1. At first I make a 3cycle (L R' L' R) or (R' L R L') depending on a situation. Thus I use an additional third edge of the top side as intermediate. 2. Then I develop an edge which is on a place of an intermediate third edge with the help of additional rotations (5 moves). 3. I make a 3cycle on item 1 in the return order. 4. I make additional rotations on item 2 in the return order. About the same order of rotations as in previous my answer. With the help of algorithm (L R 'L' R) [or (R' L R L')] I solve all edges of a pyraminx crystal. Any other methods and algorithms I do not remember and I do not use.
Last edited by pytlivyj_1 on Mon Oct 18, 2010 1:11 pm, edited 1 time in total.


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Luke

Post subject: Re: Help me solve the pyraminx crystal. Posted: Mon Oct 18, 2010 1:11 pm 

Joined: Thu Sep 24, 2009 12:21 pm Location: Chichester, England

For that case there is quite a simple algorithm, which you shouldn't need to know the notation for, but anyways:
Hold one edge on the UF and the other on the UR position, and then perform R'2 D' R2 L2 D' L'2 U L2 D L'2 R'2 D R2 U'.
PS: D is the opposite site to U. I'm referring to the very bottom side of the puzzle.
_________________ 3x3x3 single: 5.73 seconds. 3x3x3 average of five: 8.92 seconds. 3x3x3 average of twelve: 9.77 seconds.
Buy the Curvy Copter Skewb, NovaMinx, and more here!
Last edited by Luke on Wed Oct 20, 2010 1:38 am, edited 1 time in total.


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pytlivyj_1

Post subject: Help me solve the pyraminx crystal. Posted: Mon Oct 18, 2010 1:21 pm 

Joined: Tue Mar 24, 2009 12:52 pm

Hi, SEBUVER. To remember difficult algorithms it is necessary only for a highspeed method. And so these algorithms are not necessary.


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Luke

Post subject: Re: Help me solve the pyraminx crystal. Posted: Mon Oct 18, 2010 1:26 pm 

Joined: Thu Sep 24, 2009 12:21 pm Location: Chichester, England

This algorithm isn't difficult at all. In notation terms, it looks complex, but if you try it out on the puzzle, you will see how and what pieces move, it's quite easy to remember.
_________________ 3x3x3 single: 5.73 seconds. 3x3x3 average of five: 8.92 seconds. 3x3x3 average of twelve: 9.77 seconds.
Buy the Curvy Copter Skewb, NovaMinx, and more here!
Last edited by Luke on Wed Oct 20, 2010 1:38 am, edited 2 times in total.


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pytlivyj_1

Post subject: Help me solve the pyraminx crystal. Posted: Wed Oct 20, 2010 1:36 am 

Joined: Tue Mar 24, 2009 12:52 pm

Hi, SEBUVER. Algorithm R ' 2 D ' R2 L2 D 'L' 2 U L2 D L ' 2 R ' 2 D R2 U ' actually very good. Only you should write to it the note that the bottom (D) is opposite to top (U) and does not border with L and R!!! That is not as we have got used to rotations on a megaminx. Differently this algorithm is carried out in several ways and results in impasse.


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Luke

Post subject: Re: Help me solve the pyraminx crystal. Posted: Wed Oct 20, 2010 1:39 am 

Joined: Thu Sep 24, 2009 12:21 pm Location: Chichester, England

Glad it worked out. It looks complex, but you can see how it moves the pieces and see that there's a pattern to the algorithm.
_________________ 3x3x3 single: 5.73 seconds. 3x3x3 average of five: 8.92 seconds. 3x3x3 average of twelve: 9.77 seconds.
Buy the Curvy Copter Skewb, NovaMinx, and more here!


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Chilen

Post subject: Re: Help me solve the pyraminx crystal. Posted: Sun Nov 28, 2010 11:30 am 

Joined: Tue Aug 24, 2010 8:11 am Location: Taipei, Taiwan

2 last edges flip
R L' R' L  U 2'  L' R L R'  U2  L R L' R'
Attachments: 
Clip2.png [ 4.65 KiB  Viewed 1620 times ]

_________________ http://cclx.webs.com/
Last edited by Chilen on Sun Nov 28, 2010 10:22 pm, edited 1 time in total.


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pytlivyj_1

Post subject: Help me solve the pyraminx crystal. Posted: Sun Nov 28, 2010 2:17 pm 

Joined: Tue Mar 24, 2009 12:52 pm

Some more examples. Algorithm for figure 1: (R'' D' R2 L2 D' L'') U (L2 D L'' R'' D R2) U'  algorithm A1; Algorithm for figure 2: (R'' D' R2 L2 D' L'') U2 (L2 D L'' R'' D R2) U''  algorithm A2. Algorithm for figure 1: (R' L R L') y'' A2; Algorithm for figure 2: (L R' L' R) A2; Algorithm for figure 3: (R' L R L') y'' (L R' L' R) y'' A2. Similarly we rearrange 4 or 5 pieces of edges of last top layer in any combinations.


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Chilen

Post subject: Re: Help me solve the pyraminx crystal. Posted: Sun Nov 28, 2010 9:32 pm 

Joined: Tue Aug 24, 2010 8:11 am Location: Taipei, Taiwan

Hi, SEBUVER. Algorithm R ' 2 D ' R2 L2 D 'L' 2 U L2 D L ' 2 R ' 2 D R2 U ' is very good and easy to memorize. How did you find it?
By the way, I found another algorithm. R'2 D2 R2 D'2  L2 D'2 L'2 D2
Attachments: 
Clip4.png [ 4.64 KiB  Viewed 1548 times ]

_________________ http://cclx.webs.com/


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