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I am having trouble getting m2/r2 solves right. Specially with the M-Slice edges.

For example on Stefan's website: http://www.stefan-pochmann.info/spocc/blindsolving/M2R2/

His first example solve for the scramble:

B' R' B' U' F L' U F2 L F R' D' R' B D F2 L2 D' R2 D'

He first solves

FR- U R U' M2 U R' U'
UL- L U' L' U M2 U' L U L'
RB- l U' R' U M2 U' R U l'

I understand that much. But then he goes on to do this:

DB- M U2 M U2

Isn't the piece supposed to go to UF. Why is he shooting it to DB?
 
I am having trouble getting m2/r2 solves right. Specially with the M-Slice edges.

For example on Stefan's website: http://www.stefan-pochmann.info/spocc/blindsolving/M2R2/

His first example solve for the scramble:

B' R' B' U' F L' U F2 L F R' D' R' B D F2 L2 D' R2 D'

He first solves

FR- U R U' M2 U R' U'
UL- L U' L' U M2 U' L U L'
RB- l U' R' U M2 U' R U l'

I understand that much. But then he goes on to do this:

DB- M U2 M U2

Isn't the piece supposed to go to UF. Why is he shooting it to DB?
When the M slice is off by a M2 (as in the case above, you have done 3, which means the slice is off by M2, the spot where UF normally is is not in the UF, so thus you have to shoot to DB. The UF spot is in DB because of the M slice being off, so thus you have to shoot there. I hope I explained well.
 
I am having trouble getting m2/r2 solves right. Specially with the M-Slice edges.

For example on Stefan's website: http://www.stefan-pochmann.info/spocc/blindsolving/M2R2/

His first example solve for the scramble:

B' R' B' U' F L' U F2 L F R' D' R' B D F2 L2 D' R2 D'

He first solves

FR- U R U' M2 U R' U'
UL- L U' L' U M2 U' L U L'
RB- l U' R' U M2 U' R U l'

I understand that much. But then he goes on to do this:

DB- M U2 M U2

Isn't the piece supposed to go to UF. Why is he shooting it to DB?


That's the tricky part of M2.

You shoot to DB because that is actually its place! At that moment in the solve, the M layer is not in its original locaton because you have flicked it an odd number of times (three in this case: FR, UL, RB). For example, if you started with ORNAGE center piece in front, every odd shot will have RED in front.

With M2, every time you shoot to UF or DB you must remember if it's an even or an odd shoot, if it's odd you shoot to the oposite side. That's why you memorize in pairs.
 
whats the fingertrick for M2 U M2 U2 M2 U M2 H perm?
I used to do L2 l2' for the M2s, but now I do this:
Put your left thumb on the FL sticker, and your left middle finger on the BL sticker.
Do HALF of an L move. As you finish this, place your left ring finger on the UB sticker.
Pull your ring finger all the way down for the M2.
Do the Us and U2s as part of the same motion of the previous M2.

Takes some getting used to, but much faster.
Of course you can do all this with your right hand as well.
 
What's the fastest way to solve the F2L case where the corner is in place and oriented but the edge is in the U layer? I don't mean the alg, I mean what hand movements? It seems to me that some kind or re-gripping is unavoidable. Am I missing a trick?
1. Take out the corner and do an U turn and then turn the cube (y) before insertion. This is the fast sexy move but then requires re-gripping for the y.
2. Take out the corner and then do a double layer u turn. This should be fast because it combines 2 moves but you have to move your thumbs up to the U layer and back down which makes it slower that 1. for me.
3. Do F moves which requires some kind of re-grip.
 
peterbone : try R U R U R U' R' U' R' and it's mirror R' U' R' U' R' U R U R
no regrips, no rotations, it also preserves EO since it's 2-gen. I use these algs when there are 3 oriented edges in the LL, or when the corners are oriented.

You might also like U R U' R' r U R' U' M
again no rotations, but the M is a bit weird. I use this alg in the back slot, U' R' U R r' U' R U M' since I find the M' flows more easily.

Also, don't forget about [wiki]keyhole[/wiki] for when you have adjacent slots open.
 
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