[Help Thread] Petrus Discussion and Help thread

[a small kitten]

I think that blockbuilding a 1x2x2 and using a CE pair for the last slot would be the fastest.

That's the only way to build the block unless you count the unlikely chance of forming a 1x1x3 strip xD

 

[_D2_]

2- Well, technically you could (if you restored it later during the 2x3x3), but I wouldn't, RU is so nice, why would you want to through in an F or B?
3- PetrusLL is faster. You don't have to orient the edges like you do in Fridrich.

2- I mean like, you have a 2x2x3 block and then you make a cross on the free sides(sides that the block is not in), can you finish the 2x3x3 block with no concern about the edges orientation, because they can't be disorientated?
3- How do you orient the LL edges before?

 

[AngeL]

^

2. You shouldn't need to do anything except U,R moves if you've done Edge Orientation correctly. The whole point of EO is to reduce the rest of F2L to 2gen and orient the edges of the LL in advance. Don't use anything but U,R, because otherwise you should just do Fridrich


3. Not really sure what you're asking? If you're talking about Petrus, the Edge Orientation step makes it so that when you get to last layer, all four edges are already oriented properly.

 

[irontwig]

3- How do you orient the LL edges before?

http://lar5.com/cube/fas3.html

 

[FuzzyKittens]

I essentially just started solving like...2-3 months ago and about a month ago I switched to petrus because I got fed up with freidrich's, but I'm still just recently sub-60 so, what can I say?

 

[Cyrus C.]

_D2_, I'd recommend you look through Lars Petrus' site (http://lar5.com/cube/) and make sure this is the method you're using for the First 2 Layers.

 

[oll+phase+sync]

Is there some one using Phasing when doing Step 4b (last Slot) - In fact doing 1 or 3 additional moves for Edge PLL during F2L is quit easy if your edges are already Oriented.

 

[splinteh]

I made a Petrus video tutorial on YouTube recently, only the first part is finished though.

Petrus Tutorial

See if ya like it.

 

[Cubenovice]

OK, I am taking up the Petrus Challenge...

I've been trying sole fewest moves scrambles and find that I suck horribly at block building.
I will find some nice blocks eventually but only after going back and forth through some moves.
So I decided it is going to be Petrus F2L-time for a while.

I had actually expected this thread to be full of tutorials (as in Waffles Roux thread) :confused:

First stop: Lars' site, the Original.

 

[mariano.aquino]

Practising steps 1-2 !

F2 D2 L2 R' B' U' B2 D' U2 F U R' U2 D L B U D' B L' R D2 L F L

how would you guys up to 2x2x3?

M2U'M2UM2DF2D2 2x2x2
(u')
F'R2UR'UF2U2L'UL 2X3X3

is 18 moves bad? lol

hi!
here's my approach:

B D' B2 L2 U2 L' U2 (6 moves, 2nd corner in)
D2 L B2 L' (4 moves, 1st edge)
R2 U' B2 U (4 moves, 2nd edge)

14 moves

i didnt include cube rotations!

there are meny other approaches, since there are many pairs already formed in that scramble!=q2520forum%3B&utmu=qmu=q%2520petrus%25

 

[Cubenovice]

ehm... you are replying to a 6 month old post ;-)

But while we're at it, try:
B R2 D2 R 2x2x2
D B' L' B L2 D 2x2x3 in 11 moves

 

[irontwig]

I might do it as R B2 R U F2 D2 U B2 D'

 

[mariano.aquino]

Whoa, have you really came up with that in real time? or you spent some time looking for the best solution?

Yes, I posted an answer to a six-months-old post, 'cause i just found this page, and i started from the beginning, hehe

how do you guys practise? i need petrus-mates, and there's none here... =(

greetings!

 

[Stini]

My speed solution would be this:

2x2x2: R2 B2 R D
2x2x3: U F R' F' R'

I'm not actually a Petrus solver, but I tend to start with a 2x2x2 block if I have a CE-pair. In this case the extension to 2x2x3 is also easy to spot so I would use that as well instead of just solving rest of the cross and continue with Fridrich.

I would say that the best way to practice is to do slow solves and try to be efficient. Once you come up with a nice solution during a slow solve, it's likely that you'll recognize it in a speed solve as well. Also useful is http://laire.fi/jarcs/ to see optimal solutions for blocks, but for some reason the link doesn't seem to work atm.

 

[mariano.aquino]

that IS efficient. i guess i should start practising that way...
i could not comeup with any solution in less than 10 moves yet
i have so much to learn! i was happy to do it in less than 15 moves =P

 

[OMGitsSolved]

Is it okay to make the 2x2x3 block using one of these methods?
Roux 1x2x2 block then expand to 2x2 block then 2x2x3 block.
Roux 1x2x3 block then add the two edges.
or this http://www.youtube.com/watch?v=XzM4iyJk8Ak

 

[Cool Frog]

Is it okay to make the 2x2x3 block using one of these methods?
Roux 1x2x2 block then expand to 2x2 block then 2x2x3 block.
Roux 1x2x3 block then add the two edges.
or this http://www.youtube.com/watch?v=XzM4iyJk8Ak

Sometimes it can be, However most of the time it isn't very move optimal.

 

[OMGitsSolved]

I've gotten sub-25 averages using the first method

 

[Cool Frog]

I've gotten sub-25 averages using the first method

Ah, the first one. That seems to be the normal method, if you can force in the edge that has to go into the 2x2x2. Just don't restrict yourself to that method.

 

[JLarsen]

I was wondering with the sudden burst of Roux solvers around if Petrus is now the least used method of the 3 main?