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1/(4*72)^2=1/82994

Chance of OP = 1/2
Chance of PP = 1/2
therefore chance of no parity = (1/2)*(1/2) = 1/4
Chance of PLL skip = 1/72

Chance of no parity times Pll skip = (1/4)*(1/72) or 1/(4*72)

Chance of getting it twice in a row = 1/(4*72)*2 which = 1/(4*72)^2

aka 1/82994

Oh...
Wait, why 1/72 chance of getting a PLL skip?
 
Gawd it took forever to work out how to do this picture:
Anyway, how would someone solve this F2L case?



It's the triple SM on the blue/red pair, but they have to go in the slot to the right.
I get this case tons, and do a 100 moves to solve it.

everyone above is wrong. (U) R' F R F' R' U' R (no rotations, only 7 moves)
 
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Oh...
Wait, why 1/72 chance of getting a PLL skip?

There are 72 unique ways to arrange the LL after F2L+OLL, aka 72 unique PLLs (including AUF.)

You can test this by adding up all PLLs (1 for each possible AUF)

Some PLLs have symmetry and therefore don't have 4 unique AUFs, such as H perm which has full rotational symmetry, meaning there is only 1 way to get it - 1/72

Same goes for a PLL skip, it looks the same no matter how you AUF it (unlike G perms and most other PLLs which the blocks and headlights move into unique shapes with each AUF)
 
Adjust U Face

How long should I be using 4LLL? i average roughly 28 seconds and have had 2 solves in the sub-20 range.

I learned full PLL around where you are. Just whenever you feel like it, or feel you can't possibly get any faster with 4LL (which would be around 15 seconds probably ;P)
 
For all you pen spinners, what's a good pen to use? I know I'll get some personal preference thing just like in cubing but there have to be some that are clearly better than others. Btw I'm not looking for a mod that I have to do just a pen I can buy. Something like what can be found on penwish
 
For all you pen spinners, what's a good pen to use? I know I'll get some personal preference thing just like in cubing but there have to be some that are clearly better than others. Btw I'm not looking for a mod that I have to do just a pen I can buy. Something like what can be found on penwish

http://www.youtube.com/watch?v=5dVRammdkSI

I know a kid last year that had a ZT pen mod.
You need 2 Zebra Telescopic pens (they come in a set of 2 pens per pack)
and a grip to connect them (you can use papermate mechanical pencil grips instead of a dong-a commsaa).
Search up a tutorial on youtube on how to make one.
 
http://www.youtube.com/watch?v=5dVRammdkSI

I know a kid last year that had a ZT pen mod.
You need 2 Zebra Telescopic pens (they come in a set of 2 pens per pack)
and a grip to connect them (you can use papermate mechanical pencil grips instead of a dong-a commsaa).
Search up a tutorial on youtube on how to make one.

not too heavy

make a simple rsvp mx
 
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