ZBLL Superman’s clairvoyance (the blind-side 2 EP colors guess)

[Tito_H]

Many cubers can guess the each color of the blind-side 2 EPs (mostly BU & LU) without AUF.

I want to learn that ability, so that I could apply it for ZBLL recognition process after COLL.

For example, Superman can guess what the colors of the 2 EPs (BU & LU) are, but I can’t.

No. 1

No. 2

No. 3

No. 4

Does anyone tell me how to do it, or any document or video in the web?

 

[bcube]

I don´t know anything about 2-sided case recognition, so I can only give you a general thought process. This is what I would do: without going into details, if corners need an odd number of 2-swaps to be solved then edges need an odd number of 2-swaps as well, and if corners need an even number of 2-swaps to be solved then edges need an even number of 2-swaps as well.

I will be considering that green is in front and orange is on right for the following examples.

In this case, corners need 0 2-swaps to be solved => edges need an even number of 2-swaps. When swapping UF and UR edges, UL and UB edges need to be swapped as well. Therefore, UB edge on the picture must be yellow-red.

In this case, corners need 0 2-swaps to be solved => edges need an even number of 2-swaps. UF and UR edges are already solved, UL and UB don´t need to be swapped. Therefore, UB edge on the picture must be yellow-blue.

In this case, corners need 3 2-swaps to be solved => edges need an odd number of 2-swaps. When swapping UF and UL edges, then swapping UR and UB edges, then UF and UR edges need to be swapped as well. Therefore, UB edge on the picture must be yellow-green.

In this case, corners need 3 2-swaps to be solved => edges need an odd number of 2-swaps. When swapping UF and UB edges, then swapping UR and UL edges, then UF and UR edges need to be swapped as well. Therefore, UB edge on the picture must be yellow-orange.

 

[Tito_H]

Thank you very much for your quick reply, with your explanation. I firstly could not understand well what you mean, but finally got the point, checking each case one by one.

That was an eye-opener for me. Now I’ve got one of the Superman’s abilities!

The slight drawback for me to apply it in my solving ZBLL, is that it would not take me less time moving the pieces (0 to 3 swaps) to get the result imaginarily than just peeking the UL edge physically. Of course, it is so because I have not practiced your method yet. So, the fault is mine, not your method.

Now that I have understood the logics behind the scene based on your information, I will check how to make use of it, and if I can modify it, so that it would be more suitable for me.

 

[Tito_H]

Based on your method, I like to present my idea as follows. One small benefit of my method may be the max. number of swaps is two, instead of 3.

This is a long writing with redundant of same words, which I apologize.

<Mission impossible>
To guess what the colors of 2 blind-side edges are, without AUF.

<Purposes>

1. To apply this ability to my ZBLL recognition method (Tito method). One of the its Con is that it requires AUF, because it uses the color of each UF & UR edge.
2. To study feasibility to apply this ability to the Tran V2 ZBLL recognition method. It also needs to know the positions of the edges of the same and opposite color to the reference corner’s color.

<Conditions>

1. T set is used as an example.
2. Cube position: Yellow Center up.
3. The COLL orientation is shown as the following pictures (source: https://speedcubedb.com/a/3x3/ZBLLT).

<Terms>
Color group: a group of 2 opposite colors. There are 2 groups, which are named as follows.

• “Dark”: Blue and Green
• “Bright”: Red and Orange

<Method>

1. Recog the COLL swap type.
2. Recog the “Color group” of F-face & R-face, imaginarily swapping and twisting the corners as necessary to solve/permute them.
3. Check the colors of UF & UR edges, and understand what are the remaining 2 colors which correspond to UB/UL edges.
4. If the colors of UF and/or UR do not match the “Color group”, swap imaginarily UF and/or UR with other edge(s), such that both of them should be matched.
5. If corners need ONE swap to be solved then edges need ONE swap, and if corners are SOLVED then edges need ZERO OR TWO swaps.
6. Understanding how UB and/or UL are affected by the swap(s), unravel logically the colors of them.

I chose 6 cases as examples. The numbering after each picture corresponds to that described in the above <Method>.

T1

1. COLL swap type: Right swap.
2. Color group: F-face is Bright(Red). So, R-face is Dark.
3. Remaining colors: Orange & Blue.
4. As UF(Red) matches Bright and UR(Green) matches Dark, no swap is needed.
5. Corners need ONE swap, so edges need ONE swap. In the process 4, no swap is done, so UB & UL need swap.
6. The colors of UB & UL should be inverted before swap, which means UB is Blue and UL is Orange.

T16

1. COLL swap type: Left swap.
2. Color group: F-face is Bright(Red). So, R-face is Dark.
3. Remaining colors: Orange & Blue.
4. As UF(Green) does not match Bright and UR(Red) does not match Dark, a swap is needed.
5. Corners need ONE swap, so edges need ONE swap. In the process 4, a swap is done, so neither UB nor UL need swap.
6. As the colors of UB & UL are found out solved, UB is Orange and UL is Blue.

T26

1. COLL swap type: Back swap.
2. Color group: F-face is Dark(Green). So, R-face is Bright.
3. Remaining colors: Blue & Green.
4. As UF(Red) does not match Dark and UR(Orange) matches Bright, a swap is needed. UF should be swapped with UL, because UR (matched) should not be moved.
5. Corners need ONE swap, so edges need ONE swap. No additional swap is needed.
6. As UR is Orange and UL after swap is Red, UB should be Blue and UL before swap is Green.

T43

1. COLL swap type: Front swap.
2. Color group: F-face is Dark(Green). So, R-face is Bright.
3. Remaining colors: Red & Green.
4. As UF(Blue) matched Dark and UR(Orange) match Bright, a swap is not needed. Even if Blue and Orange is inverted, they do match under the concept of Color group.
5. Corners need ONE swap, so edges need ONE swap. In the process 4, a swap is not done, so UB & UL need swap.
6. The colors of UB & UL should be inverted before swap, which means UB is Green and UL is Red.

T51

1. COLL swap type: Diagonal swap.
2. Color group: F-face is Dark(Green or Blue). So, R-face is Bright.
3. Remaining colors: Red & Orange.
4. As UF(Green) matches Dark and UR(Blue) does not match Bright, a swap is needed. UR should be swapped with UB, because UF (matched) should not be moved.
5. Corners need ONE swap, so edges need ONE swap. No additional swap is needed.
6. As UF is Green and UB after swap is Blue, UL should be Red and UB before swap is Orange.

T62

1. COLL swap type: No swap.
2. Color group: F-face is Dark(Blue). So, R-face is Bright.
3. Remaining colors: Red & Orange.
4. As UF(Blue) matches Dark and UR(Green) does not match Bright, a swap is needed. UR should be swapped with UB, because UF (matched) should not be moved.
5. Corners are SOLVED, so edges need ZERO OR TWO swaps. In the process 4, one swap is made by UR & UB, so one more swap is needed. As UF and UB (after swap) should not be moved, the remaining UR (after swap) and UL need swap. In total TWO swap are made.
6. As UF is Blue and UB after swap is Green, UL before swap is Red and UB before swap is Orange.

In a real situation, this technique should be applied when the F2L ends up "upside down" the shape of the COLL.

I hope this is interestng for someone.

 

[bcube]

<Mission impossible>
To guess what the colors of UB & UL edges are, without AUF.

Why do you want to know the colors of UB and UL edges? Knowing whether any of these 2 edges need to be swapped (without figuring out their exact colors) is sufficient for your purpose, isn't it?

 

[Deleted member 36445]

OreKehStrah's ZBLL Recognition Guide.md

 

[Tito_H]

Why do you want to know the colors of UB and UL edges? Knowing whether any of these 2 edges need to be swapped (without figuring out their exact colors) is sufficient for your purpose, isn't it?

Thank you for your comments.

I added <Purposes> in my yesterday’s post, which I should have done it.

Knowing only whether any of these 2 edges need to be swapped does not probably fulfill the purposes.

 

[Tito_H]

OreKehStrah's ZBLL Recognition Guide.md

Thanks.

 

[FelipeWilson]

Many cubers can guess the each color of the blind-side 2 EPs (mostly BU & LU) without AUF.

I want to learn that ability, so that I could apply it for ZBLL recognition process after COLL.

For example, Superman can guess what the colors of the 2 EPs (BU & LU) are, but I can’t.

No. 1

View attachment 43731


No. 2

View attachment 43732


No. 3

View attachment 43733


No. 4

View attachment 43734

Does anyone tell me how to do it, or any document or video in the web?

What do you know ? Like what method do you know and use ?

 

[Tito_H]

What do you know ? Like what method do you know and use ?

Thanks.

I am not sure if I am replying to your questions correctly, but please see my following reply.

(What do you know?)
CFOP, ZZ, F2L, OLL, PLL, COLL, ZBLL algs (not all yet), PLL 2-side recog, ZBLL recog (the 5 methods described by Mr. OreKehStrah)

(Like what method do you know and use?)
I know and use 3X3 CFOP and ZZ, ZBLL Blocks and BH recog. methods.

Now I am developing my ZBLL recog method (Tito method), and want to know if there is an “easy” way to guess 2 colors of blind-side edges without peeking left-side face or doing AUF.