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I posted this in the V-cubes thread, but if anyone else is interested here is how I thought about those "oblique" centers for my 6x6x6 BLD solve.

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We're calling those the "oblique" centers. They are by far the hardest thing about solving the bigger cubes blindfolded, in my opinion at least.

My definition of the types of pieces, for the 6x6x6 since it's the only one I've tried obviously, are the

1) corners

2) inner wings

3) outer wings

4) inner x-centers

5) outer x-centers

6) "clockwise" oblique centers

7) "counter-clockwise" oblique centers

The 7x7x7 has all the same pieces, but add to this

8) inner t-centers

9) outer t-centers

10) central edges (like on a 3x3x3)

Ok, so for oblique centers I tried 3 different things for each of my 3 different solves as to how to visualize them.

First solve I tried to think of them purely in the abstract sense. I imagined them as having coordinates in a matrix (in a 6x6 matrix, since each face has 36 stickers, or "entries"). This does not work well for the B and D faces, and I did DNF my first solve, mostly because of centers, so I don't recommend this method.

Second solve I tried to think of them as numbers of layers away from the corners. The notation I will be using was mentioned before on the speedsolving yahoo group, but if a better one is developed I don't mind switching.

The layers, as seen from left to right (L and R) are:

L l1 l2 r2 r1 R

for a 7x7x7 it would be

L l1 l2 m r2 r1 R

So anyway the oblique center at [U l2 b1] is my "A" piece for the "clockwise oblique centers". This is because, as seen from the outer x-center oribt (the piece at [U l1 b1]) I would have to rotate clockwise one piece (inside the 2x2 grid of each of the different kinds of x-centers) to get to it.

But look at the definition of the piece I gave you [U l2 b1] that means, from the corner at UBL I would count over 2 slices to the right (placing me on the l2 slice) and one slice toward me (placing me at b1). You do the same on other faces.

I DNF'd my second solve too, also partially due to centers, and I don't recommend this second method either.

Ok, the solve I got I pictured the oblique centers completely visually. I liked this method so much that it is what I will use in the future. Although I define the oblique centers in 2 groups, clockwise and clockwise groups of them, when solving I picture them visually.

So for example on any given face, when looking at all of the clockwise- and counterclockwise-oblique centers you will see that there are 8 of them per face. Let's say we are looking at all the oblique centers on the U face.

They, all 8, are at:

[U l2 b1]; [U r2 b1] (all on the b1 slice)

[U l1 b2]; [U l1 f2] (all on the l1 slice)

[U f1 l2]; [U f1 r2] (all on the f1 slice)

[U r1 f2]; [U r1 b2] (all on the r1 slice)

Ok, notice that they come in pairs of 2 on each of the b1, l1, f1, and r1 slices. When solving I think of them by these pairs. First I decide which of those 4 pairs it cycles to - basically just think does it cycle to the "top" of the face, the "left" of the face, the "right" of the face, or the "bottom" of the face. Then, upon deciding that you have to visualize which of the 2 pieces is interchangeable with your buffer. To do this I imagine how I would move my buffer to that pair of pieces. I think with more practice that I would eventually work to just memorize which piece is the "clockwise-oblique" and which is the "counter-clockwise-oblique" for each pair, but for a first solve this is how I did it. It works very quickly, very easily, and that is the only solve of the 3 I solved successfully.

So when you are working on those oblique centers, that's how I recommend to do it.

-------------------------------------------------

Good luck everybody, I hope to join the fun when I get back from my trip!

------------------------

We're calling those the "oblique" centers. They are by far the hardest thing about solving the bigger cubes blindfolded, in my opinion at least.

My definition of the types of pieces, for the 6x6x6 since it's the only one I've tried obviously, are the

1) corners

2) inner wings

3) outer wings

4) inner x-centers

5) outer x-centers

6) "clockwise" oblique centers

7) "counter-clockwise" oblique centers

The 7x7x7 has all the same pieces, but add to this

8) inner t-centers

9) outer t-centers

10) central edges (like on a 3x3x3)

Ok, so for oblique centers I tried 3 different things for each of my 3 different solves as to how to visualize them.

First solve I tried to think of them purely in the abstract sense. I imagined them as having coordinates in a matrix (in a 6x6 matrix, since each face has 36 stickers, or "entries"). This does not work well for the B and D faces, and I did DNF my first solve, mostly because of centers, so I don't recommend this method.

Second solve I tried to think of them as numbers of layers away from the corners. The notation I will be using was mentioned before on the speedsolving yahoo group, but if a better one is developed I don't mind switching.

The layers, as seen from left to right (L and R) are:

L l1 l2 r2 r1 R

for a 7x7x7 it would be

L l1 l2 m r2 r1 R

So anyway the oblique center at [U l2 b1] is my "A" piece for the "clockwise oblique centers". This is because, as seen from the outer x-center oribt (the piece at [U l1 b1]) I would have to rotate clockwise one piece (inside the 2x2 grid of each of the different kinds of x-centers) to get to it.

But look at the definition of the piece I gave you [U l2 b1] that means, from the corner at UBL I would count over 2 slices to the right (placing me on the l2 slice) and one slice toward me (placing me at b1). You do the same on other faces.

I DNF'd my second solve too, also partially due to centers, and I don't recommend this second method either.

Ok, the solve I got I pictured the oblique centers completely visually. I liked this method so much that it is what I will use in the future. Although I define the oblique centers in 2 groups, clockwise and clockwise groups of them, when solving I picture them visually.

So for example on any given face, when looking at all of the clockwise- and counterclockwise-oblique centers you will see that there are 8 of them per face. Let's say we are looking at all the oblique centers on the U face.

They, all 8, are at:

[U l2 b1]; [U r2 b1] (all on the b1 slice)

[U l1 b2]; [U l1 f2] (all on the l1 slice)

[U f1 l2]; [U f1 r2] (all on the f1 slice)

[U r1 f2]; [U r1 b2] (all on the r1 slice)

Ok, notice that they come in pairs of 2 on each of the b1, l1, f1, and r1 slices. When solving I think of them by these pairs. First I decide which of those 4 pairs it cycles to - basically just think does it cycle to the "top" of the face, the "left" of the face, the "right" of the face, or the "bottom" of the face. Then, upon deciding that you have to visualize which of the 2 pieces is interchangeable with your buffer. To do this I imagine how I would move my buffer to that pair of pieces. I think with more practice that I would eventually work to just memorize which piece is the "clockwise-oblique" and which is the "counter-clockwise-oblique" for each pair, but for a first solve this is how I did it. It works very quickly, very easily, and that is the only solve of the 3 I solved successfully.

So when you are working on those oblique centers, that's how I recommend to do it.

-------------------------------------------------

Good luck everybody, I hope to join the fun when I get back from my trip!