Random Blindfold Cubing Discussion

fp4316 said:
If you do the cycle DF UB FR (assuming you double flick with lefty pinky->ring), there are essentially no regrips. If you do DF UB FL, there is a regrip because you are double flicking with the same hand that has to do the insertion, so the case is slower. Does this mean it's beneficial to become versatile in mirror cases (e.g. righty M2)?

The only counterargument I can think of is that switching between lefty and righty M2s may require more regrips between comms, but I don't even think this is the case. If you look at the case DF FU RB, it sets you up to continue with a lefty M move, and vice versa. Since edges are essentially symmetric, this implies there are the same amount of comms that would be quicker to continue on a lefty M move as a righty M move, meaning there wouldn't actually be any additional regrips if you learned righty M cases.

Even cases such as DF UL FR are faster than their mirrors because there are fewer / no regrips given you are using a lefty M for both.
Click to expand...
I do either righty or left M2, depending on the case
 
Daniel Lin said:
I do either righty or left M2, depending on the case
Click to expand...
Please see this, I would appreciate your input:

One more question / discussion for those who are interested in extreme edge execution optimization, I would appreciate everyone's thoughts.

These all assume you perform M2s with either a pinky->ring, ring->pinky, L l'M', or R' rM' move. This is because these are the M2s that free your index (as opposed to something like ring middle, which traps your index and frees your pinky), meaning it is quicker to execute comms because there is no pause between the M2 and insert.

If you do the cycle DF UB FR, with a lefty M2 (again, one of the aforementioned ways), it is regripless, because you do the insertion with your right hand. If you do the cycle DF UB FL, there is a small regrip, because you have to insert with the same hand with which you do your M2. If you time these two comms you should hopefully see a difference of 0.1-0.2s.

This got me thinking, is it optimal to learn the mirrors for every comm? For instance using a righty M2 flick (or an R' rM') for DF UB FL, making it regripless. These comms should theoretically be faster to execute (assuming you practice them), because of the lack of a regrip. However, there are a few issues I have encountered.

1) Transitioning from lefty M2s (or M' or M or whatever) to righty M2s between comms requires a regrip, which would potentially cancel out / defeat the point of using a regripless comm. For instance if you do DF UB DR, it sets you up to more quickly continue with a lefty M2 - because your fingers naturally position there at the end of the comm.

2) Point 1) is further complicated by the fact that due to edges' being symmetric, there are an (approximately) equal amount of comms that end in a spot where it is faster to continue with a lefty M2 as there are with a righty M2, meaning you wouldn't be doing any more regrips than you would if you only did lefty M2s.

3) Point 3) is even further complicated because the split between comms is not 50/50. If you only do a lefty M2:

The cycles DF-UB-FR and DF-FR-UB set up to another lefty M2
The cycle DF-UB-FL sets up to a righty M2 instead (naturally, as it is mirrored).

However, the cycle DF-FL-UB sets up to a lefty M2, because you end on the interchange meaning your left hand is automatically positioned to perform another M slice move. This implies that if you perform every edge comm with lefty M moves, there are slightly more comms that will end on another lefty M2, meaning you will be doing <50% regrips, whereas in the mirrored situation approximately 50% of your comms will have a regrip.

This makes it very complex to figure out the optimal way to do edge execution. I assume a true optimal method (ignoring 5style, floating buffers, etc) would be to practice mirrored fingertricks, and perform the comm based on the position your fingers were left from the last comm.

This however, requires very good thinkahead. Finally, you would have to individually check each case if it would be faster to perform the slower comm (where you don't have to regrip between the comms), or to regrip first between the comms, and to perform the mirrored, pauseless comm. This itself would be a feat because it is extremely hard to measure the differences between the two.

I've been sitting at my computer for about 10 hours now doing comms over and over, to try to determine the best way to go about this, and would greatly appreciate anyone's thoughts on the matter.
 
DNF(25.41) B U2 R2 B' U2 L2 F L2 D2 R2 F D B L U R2 B' D' R' F L2
tfw you get to actually use the only 5 cycle you know in a solve :D. (Scramble WCA orientation, switch to blue top red front and do M' U M U'). Ended up screwing up one of the other 3 pairs in edges somehow tho :P
 
guysensei1 said:
Oh I thought you were talking about R U R' U R U2 R' lol
Click to expand...
yeah I just call it sune I don't think it has an actual name

Just had the stupidest BLD av12
DNF(41.27),DNF(40.65), 40.13,DNF(37.84),DNF(48.49),DNF(32.40), (33.21),DNF(32.38),DNF(33.05),DNF(29.35), 33.34, (DNF(38.24))
wasn't counting, but I think 6 of the solves were off by a 3cycle, including the 29
 
nice scramble
1. 36.53 U' L2 U' F2 D L2 D2 R2 U B2 F2 L' D' F' U' F D2 U2 F' R' U'

EDIT: another cool scramble
1. 36.89 B' R2 U2 B2 R2 F' L2 B' D2 L2 B' D L U' L D2 F D' R2 B' U2
notice how there are two corners swapped at the bottom. just do R2 rperm R2 at the end to solve parity
 
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