edward_9x
Veteran
For those still desperately clinging onto line, here's something that might shave off 0.1s from your times:
This post seeks to showcase a cool idea for planning past EOLine, and predicting the DL and DR edges for the purposes of making lookahead easier during F2L. One might choose to do an EOCross to fix the edge visibility problem during F2L, but I think this system can yield similar results while still retaining the efficiency of <RUL> blockbuilding.
1. Plan your EOLine
For example, consider the following scramble:
and the following EOLine solution:
2. Go through the inverse of your solution, while tracking only the positions of the current DL and DR
Our inverse is
During inspection, we predict where DL and DR would end up if we were to do these moves.
As you can see, they would end up in FL and FR.
3. The edges which are currently in the position where the old edges ended up, are the edges which will go to DL and DR.
Now, let's go through the inverse of the inverse. Our rationale is that, if by doing the inverse, DL and DR will end up in FL and FR, respectively, then by doing the inverse of the inverse, which is just our EOLine solution, then FL and FR will end up in DL and DR.
In our case, the red-green and yellow-green edges will end up in DL and DR.
As you can see, this technique provides a reliable way to predict which pieces will be in a certain spot. In a way, it's a constant time technique. Instead of potentially going through all 12 edges and running out of pre-inspection time, this method will always take about the same time it takes to plan your EOLine. A good solver should be able to track the rest of the blind spots during ZZF2L, with enough training. Now, if only the ergonomics problem of line could be solved...
Other uses:
You can do something similar after planning your final Cross/XCross to, for example, predict BL and BR before starting F2L. I think planning anything more than 2 or 3 pieces with this technique would be a hassle.
This post seeks to showcase a cool idea for planning past EOLine, and predicting the DL and DR edges for the purposes of making lookahead easier during F2L. One might choose to do an EOCross to fix the edge visibility problem during F2L, but I think this system can yield similar results while still retaining the efficiency of <RUL> blockbuilding.
1. Plan your EOLine
For example, consider the following scramble:
U2 L2 B' D2 R2 D2 B F' U2 B' R2 U' R F' D' L U' L2 F2 D', and the following EOLine solution:
R' B2 U L B F.2. Go through the inverse of your solution, while tracking only the positions of the current DL and DR
Our inverse is
F' B' L' U' B2 R. During inspection, we predict where DL and DR would end up if we were to do these moves.
As you can see, they would end up in FL and FR.
3. The edges which are currently in the position where the old edges ended up, are the edges which will go to DL and DR.
Now, let's go through the inverse of the inverse. Our rationale is that, if by doing the inverse, DL and DR will end up in FL and FR, respectively, then by doing the inverse of the inverse, which is just our EOLine solution, then FL and FR will end up in DL and DR.
In our case, the red-green and yellow-green edges will end up in DL and DR.
As you can see, this technique provides a reliable way to predict which pieces will be in a certain spot. In a way, it's a constant time technique. Instead of potentially going through all 12 edges and running out of pre-inspection time, this method will always take about the same time it takes to plan your EOLine. A good solver should be able to track the rest of the blind spots during ZZF2L, with enough training. Now, if only the ergonomics problem of line could be solved...
Other uses:
You can do something similar after planning your final Cross/XCross to, for example, predict BL and BR before starting F2L. I think planning anything more than 2 or 3 pieces with this technique would be a hassle.
