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 Post subject: Master Helicopter Cube - ScrambledPosted: Sat Feb 12, 2011 4:31 pm

Joined: Wed Jan 07, 2009 6:46 pm
Location: Evanston, IL
On your marks, get set, go!

Attachment:
File comment: Notice: No jumbling moves were used in the scrambling of this puzzle.

SANY1294.JPG [ 2.11 MiB | Viewed 2155 times ]

Any guidance would be greatly appreciated.

-π (Eitan)

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 Post subject: Re: Master Helicopter Cube - ScrambledPosted: Sat Feb 12, 2011 4:34 pm

Joined: Thu Sep 24, 2009 12:21 pm
Location: Chichester, England
Shouldn't be too hard. You can pretty much solve it with one algorithm. That algorithm is G S H A W I R' H'.

Notation:

G = Get
S = Sledge
H = Hammer
A = And
W = Whack
I = It
R' = Really
H' = Hard

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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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 Post subject: Re: Master Helicopter Cube - ScrambledPosted: Sat Feb 12, 2011 4:36 pm

Joined: Wed Jan 07, 2009 6:46 pm
Location: Evanston, IL
Funny, yet totally not funny at the same time.

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Eitan = "EIGHT-ahn"
Check out my video: Twisty Puzzles a la Vi

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 Post subject: Re: Master Helicopter Cube - ScrambledPosted: Sat Feb 12, 2011 4:38 pm

Joined: Thu Sep 24, 2009 12:21 pm
Location: Chichester, England
Okay, I'm in a lame funny mood today. You could probably solve it with reduction. By the way, is it scrambled with jumbling or without?

_________________
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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 Post subject: Re: Master Helicopter Cube - ScrambledPosted: Sat Feb 12, 2011 4:41 pm

Joined: Wed Jan 07, 2009 6:46 pm
Location: Evanston, IL
If you look closely, in the "File Comment" for the picture, it says "Notice: No jumbling moves were used in the scrambling of this puzzle."

-Eitan

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Eitan = "EIGHT-ahn"
Check out my video: Twisty Puzzles a la Vi

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 Post subject: Re: Master Helicopter Cube - ScrambledPosted: Sat Feb 12, 2011 5:32 pm

Joined: Wed Jan 28, 2009 7:55 pm
Location: Montana
There are pieces here that are much as the Curvy Copter that do not appear on the external surface of the normal helicopter. If you use reduction, knowledge of Curvy Copter solving is required.

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 Post subject: Re: Master Helicopter Cube - ScrambledPosted: Sat Feb 12, 2011 8:18 pm

Joined: Mon Jul 21, 2008 4:52 am
Location: Brighton, UK
pirsquared wrote:
Any guidance would be greatly appreciated.
My recommended solving order is shown below, where the 1 and 2 pieces solve like a Curvy Copter, then 3 and 4 in either order non pure with [1,1] commutators, finishing with 5 and 6 in either order pure with [3,1] commutators. I have written example algos in invisible ink beneath the image.
Attachment:

Master Heli Cube solution.png [ 56.98 KiB | Viewed 2049 times ]

3 - [FU, ur]
4 - [fu, ur]
5 - [FR fu FR, ur]
6 - [FR FU FR, ur]
(lower case means slice move)

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 Post subject: Re: Master Helicopter Cube - ScrambledPosted: Sat Feb 12, 2011 11:10 pm

Joined: Wed Jan 07, 2009 6:46 pm
Location: Evanston, IL
What does "non-pure" mean? Can you explain the "[1,1]" thing? The Puzzle Solving forum is foreign territory to me, as I am mostly a puzzle builder.

Thanks.

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Eitan = "EIGHT-ahn"
Check out my video: Twisty Puzzles a la Vi

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 Post subject: Re: Master Helicopter Cube - ScrambledPosted: Sat Feb 12, 2011 11:16 pm

Joined: Tue Feb 16, 2010 12:15 pm
Location: Sandnes, Norway
pirsquared wrote:
What does "non-pure" mean? Can you explain the "[1,1]" thing?
Non-pure means that it's also moving other pieces along with the desired ones. In other words, pure means only moving targeted pieces without effecting any of the others.

The formula for a [1,1] commutator is X, Y, X', Y'. So basically it's a 4-move sequence you're looking for. A classic is the corner orientating [1,1] for a standard 3x3x3 cube solved by the beginners method: R, U, R', U'.

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 Post subject: Re: Master Helicopter Cube - ScrambledPosted: Sun Feb 13, 2011 1:03 am

Joined: Wed Jan 07, 2009 6:46 pm
Location: Evanston, IL
Katja wrote:
pirsquared wrote:
What does "non-pure" mean? Can you explain the "[1,1]" thing?
Non-pure means that it's also moving other pieces along with the desired ones. In other words, pure means only moving targeted pieces without effecting any of the others.

The formula for a [1,1] commutator is X, Y, X', Y'. So basically it's a 4-move sequence you're looking for. A classic is the corner orientating [1,1] for a standard 3x3x3 cube solved by the beginners method: R, U, R', U'.

Thanks!

Julian wrote:
(lower case means slice move)

What does upper case mean? There are 3 kinds of moves. Outer layer, inner layer, and both.

I just finished solving the Curvy Copter pieces. I'll see what I can do with the other commutators.

-Eitan

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Eitan = "EIGHT-ahn"
Check out my video: Twisty Puzzles a la Vi

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 Post subject: Re: Master Helicopter Cube - ScrambledPosted: Sun Feb 13, 2011 6:21 am

Joined: Mon Jul 21, 2008 4:52 am
Location: Brighton, UK
pirsquared wrote:
Julian wrote:
(lower case means slice move)
What does upper case mean? There are 3 kinds of moves. Outer layer, inner layer, and both.
Upper case means outer layer move.

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 Post subject: Re: Master Helicopter Cube - ScrambledPosted: Tue Feb 15, 2011 4:28 am

Joined: Tue Aug 24, 2010 8:11 am
Location: Taipei, Taiwan
Could anyone tell me what it is [FR fu FR, ur]?
Thanks.

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http://cclx.webs.com/

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 Post subject: Re: Master Helicopter Cube - ScrambledPosted: Tue Feb 15, 2011 7:11 am

Joined: Mon Jul 21, 2008 4:52 am
Location: Brighton, UK
Chilen wrote:
Could anyone tell me what it is [FR fu FR, ur]?
Thanks.
In full, the algo is FR fu FR ur FR fu FR ur.

Assigning face labels to the puzzle just like with a regular 3x3x3 cube, F(ront), U(p), R(ight), etc., the first two moves described in full are:

FR = Outer 180 degree twist of the edge between the F and R faces
fu = Inner/slice 180 degree twist of the edge between the F and U faces

And so on.

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 Post subject: Re: Master Helicopter Cube - ScrambledPosted: Tue Feb 15, 2011 7:35 am

Joined: Sun Oct 08, 2006 1:47 pm
Location: Houston/San Antonio, Texas
Julian wrote:
Chilen wrote:
Could anyone tell me what it is [FR fu FR, ur]?
Thanks.
In full, the algo is FR fu FR ur FR fu FR ur.

Assigning face labels to the puzzle just like with a regular 3x3x3 cube, F(ront), U(p), R(ight), etc., the first two moves described in full are:

FR = Outer 180 degree twist of the edge between the F and R faces
fu = Inner/slice 180 degree twist of the edge between the F and U faces

And so on.

Julian's response is 100% correct, but it may give the wrong impression. In general, the commutator [a,b] is the same as a b a' b'

(where ' denotes the inverse of an operation; aka doing the operation in reverse)

So on a Rubik's Cube [F,R] = F R F' R'
and [U',FRD]=U' F R D U D' R' F' [note that (abc)'=c'b'a']

it just so happens that on a master helicopter, (remember FR denotes a single move, not two) FR = FR' and for this particular case, FR fu FR is a palindrome so reversing the order does nothing, although technically it still must be done.

Make sense?

Peace,
Matt Galla

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 Post subject: Re: Master Helicopter Cube - ScrambledPosted: Tue Feb 15, 2011 8:08 am

Joined: Tue Aug 24, 2010 8:11 am
Location: Taipei, Taiwan
Thank you, Julian and Allagem.
I found [FR fu FR, ur] will change 3 centers purely.
So I think changing step4 to step6 seems easier.
4 [FR FU FR FU, ur]
5 [fr, ur]
6 [FR fu FR, ur]
Maybe I am wrong.

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http://cclx.webs.com/

Last edited by Chilen on Tue Feb 15, 2011 2:12 pm, edited 1 time in total.

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 Post subject: Re: Master Helicopter Cube - ScrambledPosted: Tue Feb 15, 2011 1:50 pm

Joined: Sat Jan 30, 2010 3:11 am
Location: Italy
OMG!!!!!! looks very difficult!!!!

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 Post subject: Re: Master Helicopter Cube - ScrambledPosted: Tue Mar 15, 2011 7:27 pm

Joined: Wed Jan 07, 2009 6:46 pm
Location: Evanston, IL
Hey Solvers,

I'm still working away at this, and it's driving me insane. I am stuck with two pairs of "piece 3" switched. Here's a picture.
Attachment:

SANY1345.JPG [ 2.12 MiB | Viewed 1615 times ]

I feel like I'm going around in circles. Any help would be greatly appreciated.

Thanks!

-Eitan

_________________
Eitan = "EIGHT-ahn"
Check out my video: Twisty Puzzles a la Vi

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 Post subject: Re: Master Helicopter Cube - ScrambledPosted: Tue Apr 19, 2011 2:06 am

Joined: Tue Aug 24, 2010 8:11 am
Location: Taipei, Taiwan
I think you can do jumbling to swap piece 1,2 and 3,4 ,than turn (RD) to swap 3,4 and 5,6.
Now you will see three pairs (orange, green and green)
Do 3-cycle algorithm to Fix the orange pair than swap 3,4 and 5,6
Do jumbling to swap 1,2 and 3,4

 Attachments: Clip3.png [ 9.04 KiB | Viewed 1487 times ]

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