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 Post subject: Odd Helicopter Cube Parity IssuePosted: Thu Oct 14, 2010 11:50 pm

Joined: Mon Mar 03, 2008 5:30 pm
Location: NYC
Hey everybody I know there've been some threads discussing problems people have had solving the helicopter cube but I encountered a case that I couldn't find anywhere. I've solved the puzzle several times just fine (no jumbling just yet) but this time is different. I have two adjacent corners which are oriented correctly, but need to switch position as shown in the picture. I know for sure this isn't a messy result of jumbling the puzzle and putting it back the wrong way because I took the puzzle apart and reassembled it into the solved state right before doing the scramble that led me to this problem. All of the commutators I know and have tried only either accomplish a 3-cycle or switch 2 pairs of corners, not only one pair. Any tips or algorithms for solving the cube from this state would be much appreciated. Thanks!
Danny
Attachment:
File comment: The UFL and UFR corners need to switch. Everything else is solved.

P1010150444535.jpg [ 42.24 KiB | Viewed 1606 times ]

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 Post subject: Re: Odd Helicopter Cube Parity IssuePosted: Fri Oct 15, 2010 12:58 am

Joined: Mon Dec 08, 2008 1:45 am
Location: New Zealand
Hi Danny,

Hold the Cube so that the Corners to be swapped are on the FU edge.

Here is the non-jumbling Algorithm:

FR UR UF FR UF UR FR UF UR UF UR UF UR

And here is the jumbling Algorithm('+' means one part clockwise, '-' means one part counter-clockwise):

(UR+ FL+) UF (FL- UR-) (UL- FR-) UF (FR+ UL+) UF

Both these algorithms will leave you with a cube with 2 corners to be rotated (in this case).

Good luck!
-Mark-

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 Post subject: Re: Odd Helicopter Cube Parity IssuePosted: Fri Oct 15, 2010 1:33 am

Joined: Mon Mar 03, 2008 5:30 pm
Location: NYC
Beautiful! This is exactly what I was looking for. Thanks a ton.
By the way, the simplicity of that jumbling algorithm made me giggle. I LOVE it.

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