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ok thanks


how dose megaminx and clock scrambles work?
Clock Scrambler
Megaminx Scrambler
I've never had a clock, but megaminx notation is actually pretty simple.

Hi, will rubiks cube's last longer lubed with a petroleum-based lubricant (vaseline), or just left unlubed? Thanks
Ew, don't use vaseline. Use silicone spray (like CRC) or something like Lubix. They don't really have any negative side effects (unlike vaseline).
 
Can someone explain how there are 42 permutations for the last slot of F2L? I keep getting 150, but I'm probably doing it wrong.

What I was doing :
5 corner positions
3 corner orientations
5 edge positions
2 edge orientations
And then multiplying them (getting 150)
 
Can someone explain how there are 42 permutations for the last slot of F2L? I keep getting 150, but I'm probably doing it wrong.

What I was doing :
5 corner positions
3 corner orientations
5 edge positions
2 edge orientations
And then multiplying them (getting 150)

Both on U:

3 corner orientations
2 edge orientations
4 edge positions relative to the corner

24

Corner on U, edge at FR:

3 corner orientations
2 edge orientations

6

Corner at DFR, edge on U:

3 corner orientations
2 edge orientations

6

Both in slot:

3 corner orientations
2 edge orientations

6
 
From my knowledge, F2L algs are always carried out with the corner in FRD or FRU. Well, Jessica Fridrich's are, anyway. So instead of 5 corner positions, its 2. That brings you down to 60... But I can't think of anything else at the moment. :/

EDIT: ninja'd
 
Both on U:

3 corner orientations
2 edge orientations
4 edge positions relative to the corner

24

Corner on U, edge at FR:

3 corner orientations
2 edge orientations

6

Corner at DFR, edge on U:

3 corner orientations
2 edge orientations

6

Both in slot:

3 corner orientations
2 edge orientations

6

Oh wow, I never even thought of AUFs :p

Now to calculate the number of positions for 2, 3, and 4 slots
 
Oh wow, I never even thought of AUFs :p

Now to calculate the number of positions for 2, 3, and 4 slots
http://www.speedsolving.com/forum/showthread.php?33524-F2L-possibilities
Well, I was basically also assuming you rotate the cube so that you are always solving the FR slot. But you could use y, y', or y2 to get the next slot you want to solve to FR. So I get 168 cases for the first slot, and all 168 of those still possible for the 2nd slot. (You can choose any slot for the corner and edge and still have a slot left over for the already-solved slot.) For the 3rd slot, there can only be one unsolved slot remaining besides the one being solved, so there are 36 cases of a corner and edge being in different wrong slots are now impossible, leaving 132 cases possible. The other thing I note is that you do not have any new cases for the 2nd, 3rd, and 4th slots than what you had for the first slot. The 132 cases for the 3rd slot and 42 cases for the last slot are just subsets of the 168 cases you can have for the 1st slot.

I note that I am also assuming that we use algs that don't affect "extraneous slots." By an extraneous slot, I mean a slot that is not the one being solved, and does not contain a piece that is to be solved. If you wish to take full advantage of unsolved extraneous slots, you could come up with more cases by assigning extraneous slots to be either "free" or needing to be preserved.
 
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