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 Post subject: 4x4x5 centers parity
PostPosted: Fri Apr 01, 2011 8:17 am 
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Hi puzzlefriends....I solved almost all my 4x4x5....just a parity problem for the centers......as shown in picture....now I'm scared to lost all my previous work ....is it any suggestion to fix this parity problem?...thanks all!!!!
Attachment:
parity centers.jpg
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 Post subject: Re: 4x4x5 centers parity
PostPosted: Fri Apr 01, 2011 10:03 am 
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superciuk wrote:
Hi puzzlefriends....I solved almost all my 4x4x5....just a parity problem for the centers......as shown in picture....now I'm scared to lost all my previous work ....is it any suggestion to fix this parity problem?...thanks all!!!!
Attachment:
parity centers.jpg


Hold it with either of the sides against yourself, yellow/white. The pairity to the right, like the image.

Then use this: (F2 2U2 r2 2U2) x2

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Never underestimate the predictability of stupidity (Vinnie Jones, Snatch)


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 Post subject: Re: 4x4x5 centers parity
PostPosted: Fri Apr 01, 2011 10:09 am 
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Don't worry, you don't have to undo anything to fix that. The move I use for this is based on 3-edge cycle I found when solving the cube using half turns only. I use this move a lot when solving higher order cubes with half turns only. The basic form is:
(R2 F2 R2 B2)x2
In your case, R = orange, F = green, B = white

But you have to change it slightly to work on centers instead of edges.
First, the number of layers you grab for R determines how many pieces don't move in the cycle (hard to explain this). For this case, you'll want to 2 layers worth of R.
Second, you vary F by which slice you has the pieces you want to move. I'm sure I'm not describing this as clear as it could be. But for your case, you'll want F to be one slice from the outside.

I hope this makes sense and you see how to adapt to other half turning puzzles.


*edit* Too way to long while composing + got distracted so Sacro beat me to the punch.

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 Post subject: Re: 4x4x5 centers parity
PostPosted: Fri Apr 01, 2011 10:27 am 
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Joined: Thu Mar 17, 2011 5:20 pm
Location: Norway
Btw, when we're at it here.

Im interested in knowing how others solve the 4x4x5. I myself use a simple "make the cube a 3x3x4".

1. Solve 6 centers on the 4x5 sides
2. Solve 4x5 sides edges using the swap edges alogarithms from 3x3x4
3. Solve 4x4 sides edge pairs
4. Use swap edges alogarithms again to swap corners
5. Solve centres on the 4x4 surfaces
6. Solve pairity

done :)

_________________
Never underestimate the predictability of stupidity (Vinnie Jones, Snatch)


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 Post subject: 4x4x5 centers parity
PostPosted: Fri Apr 01, 2011 1:10 pm 
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2 superciuk

Already there was such theme. Look here.


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 Post subject: Re: 4x4x5 centers parity
PostPosted: Fri Apr 01, 2011 2:07 pm 
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Sacro wrote:
Btw, when we're at it here.

Im interested in knowing how others solve the 4x4x5. I myself use a simple "make the cube a 3x3x4".

1. Solve 6 centers on the 4x5 sides
2. Solve 4x5 sides edges using the swap edges alogarithms from 3x3x4
3. Solve 4x4 sides edge pairs
4. Use swap edges alogarithms again to swap corners
5. Solve centres on the 4x4 surfaces
6. Solve pairity

done :)


My method is:
1. Solve the 4x4 top and bottom layer
2. Solve the 6 pairs on the 4x5 sides
3. pair the 3 edges of middle layers
4. finally swap the (triple)edges
5. Fix parity problems of the centers
6. THANKS ALL PUZZLEFRIENDS AS YOU FOR SUGGESTIONS!! :lol:

THANKS AKK GUYS!!!


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 Post subject: Re: 4x4x5 centers parity
PostPosted: Sat Apr 02, 2011 7:26 am 
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Joined: Sat Jan 30, 2010 3:11 am
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Sacro wrote:
superciuk wrote:
Hi puzzlefriends....I solved almost all my 4x4x5....just a parity problem for the centers......as shown in picture....now I'm scared to lost all my previous work ....is it any suggestion to fix this parity problem?...thanks all!!!!
Attachment:
parity centers.jpg


Hold it with either of the sides against yourself, yellow/white. The pairity to the right, like the image.

Then use this: (F2 2U2 r2 2U2) x2

Thanks Sacro...just a question about notation....what means 2U2? is it a 2 turns of the middle layer or a different one?


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 Post subject: 4x4x5 centers parity
PostPosted: Sat Apr 02, 2011 7:51 am 
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2U2 is a turn of two top layers simultaneously.


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 Post subject: Re: 4x4x5 centers parity
PostPosted: Sat Apr 02, 2011 8:12 am 
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Joined: Sat Jan 30, 2010 3:11 am
Location: Italy
pytlivyj_1 wrote:
2U2 is a turn of two top layers simultaneously.

Thank you!!! :D :D
Ok...now it works...but the 2 centers are swapped..so I have parity to fix again....


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 Post subject: Re: 4x4x5 centers parity
PostPosted: Sat Apr 02, 2011 10:33 am 
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Joined: Fri Mar 18, 2011 9:26 pm
Superciuk, check theses out:

http://www.youtube.com/watch?v=2T1Hw-vIrFY

And:

http://www.youtube.com/watch?v=YQ0qW7OwmGg

Hope it helps!


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 Post subject: Re: 4x4x5 centers parity
PostPosted: Sun Apr 03, 2011 2:36 am 
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Joined: Sat Jan 30, 2010 3:11 am
Location: Italy
DONE!!!!! I just scrambled again my cuboid...(BTW....it's very nice to turn this pretty cuboid) and I had centers parity again.....then I solved centers parity...and I got edges parity.....then I had only 2 adiacent center edges parity...aand finally I solve it!!!! :D :D :D
I'm very happy of that because I solved many puzzles....but I found a great challenge with this fantastic cuboid.....and it's great for me to solve it...I like very much the sensation that you feel when you complete the last turn of any layer and then see your cube-cuboid-mnx-or other challenge in totally solved position.... :P :P Now waiting for the new challenge ...the 5x5x4..... :lol:
Thanks to all puzzlefriends for help and suggestions....and ......till next challenge..... :mrgreen:


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