# SpeedSolving Puzzles Community

Owen Morrison
ohhhh okay I think I am figuring it out now...
fun at the joy
@PetrusQuber What do you think of doing EO with 223 on left. I am a lot faster with that (probably because I am not used to 223 in back)
I did an Ao12 (12.28) and timed my splits and here they are:
223: 4.27
EO: 2.41
F2L: 2.53
LL: 3.13

I still have no sub-10 though
ProStar
EO with 223 on the left isn't as good because F U B (with occasional R) is worse than R U L (with occasional F). Plus when you orient 4 edges with M moves you'd have to do S moves. Overall it's not worth saving a rotation when transitioning to F2L
Owen Morrison
Alright I finally figured out Petrus EO, thanks for the algs and tips btw, I was doing ZZ EO at first so I couldn't realize that they worked.
ProStar
Owen Morrison
haha worse because it still takes me a bit to recognize the EO, at least I know how to do it now. I will do an average of 12 and let you know what it is.
ProStar
Yeah, whenever I go from doing Petrus-W(uses ZZ EO) to normal Petrus EO always takes forever to recognize, it's kind of like when I try to do CN solves lol
Owen Morrison
wait I thought Petrus W skipped EO...
ProStar
No Petrus-W does 223, then does ZZ EO and solves L2P(last 2 pairs(coined by yours truly), basically F2L minus the last cross edge) with R U L, then COLL and L5EP(alternatively you can do WV for LS then HKPLL, but intended was COLL->L5EP)
Owen Morrison
why would you not put the cross edge in? it takes like 0.25 seconds for like 1 second back at the end.
ProStar
because it's awkward to do with ZZ EO done. It makes L2P easier
ProStar
Here's an example solve of Petrus-W done by WoowyBaby when it was first proposed:

Scr: L2 U2 B D2 R F2 R2 U' F2 U2 B' L2 U2 L2 U2 B' D2 F L2 R'
(y2)
L' D2 R U2 B2 // 222
F U2 R2 U R D R' D' // 223
L' U2 L F // EO
U2 L' U L F2 U' F2 U F2 // 2P
U2 l' U' L U R U' r' F // CLL
U' R2 D r2 B2 R2 D r2 B2 U2 // L5E
PetrusQuber
@fun at the joy I’m not the person to answer that question, but my opinion is that it’s not worth it to do EO on left, because the saved y’ rotation doesn’t actually take a lot of time up, and you’re sacrificing that for worse ergonomics. Unless someone can develop a sheet load of new and fast
PetrusQuber
EO algorithms that are quite fingertrickable, I won’t be switching. Also can I say you take a lot of time to do EO, my EO is around 1/5 of my 2x2x3, while yours is half. Here’s what Tao Yu thinks:
PetrusQuber
EO with Block in back vs block on left is an interesting question. Up until now, pretty much all fast Petrus solvers have done block in back. Block on right had been thought of as bad since we didn't know any good algs for it. Now though, as some people have posted, there have been some decent algs found for block on right.
PetrusQuber
I've not heard of anyone who has gotten good at block on right to the point where it's faster than block in back, but I think it's something worth looking into and something you should experiment with yourself. Sub 8 is after all unexplored territory, and you should be prepared to try things people have not tried before, and do your own analyses.
WarriorCatCuber
You can do Petrus-W if you want!
Owen Morrison
I thought about it, but I am not a fan of solving the edges at the end. ZZ EO seems to be more natural to me but I can do Petrus EO now.
Owen Morrison
alright I said at first that I wanted to be sub 10 with Petrus, but I think I will not have a specific goal in mind for the time. I think I am just going to solve with Petrus until I have all of COLL memorized, but during this time I will still learn some EO algs and better blockbuilding techniques. I am also making sure that I am not always solving with white or yellow on bottom.