• Welcome to the Speedsolving.com, home of the web's largest puzzle community!
    You are currently viewing our forum as a guest which gives you limited access to join discussions and access our other features.

    Registration is fast, simple and absolutely free so please, join our community of 30,000+ people from around the world today!

    If you are already a member, simply login to hide this message and begin participating in the community!

Parity Elimination

Joined
May 28, 2016
Messages
29
Likes
3
Thread starter #1
Hello everyone,

Method :
Corners : OP / tuRBo
Edges : M2 / tuRBo

Suppose, I am using OP for corners and tuRBo for edges, then :
Condition : I get odd number of targets for corner cycles
Question : So, I know that the UB and the UL edges are going to be swapped in the end, so can I directly memorize the edges in such a way that I assume that the edges in the UB and the UL positions are swapped? Will this eliminate parity, or do I still get a parity?

Thanks,
CxCxC
 
Joined
May 28, 2016
Messages
29
Likes
3
Thread starter #3
Thanks for replying but what I wanted to say is that IF I memo the edges in a way that I assume that the UB piece is in the UL position and the UL piece is in the UB position and then solve the edges, then will it eliminate parity?

I mean, this way, won't there be any need to exchange those edge pieces in the end?
They will already be solved, right?
 
Joined
Mar 9, 2015
Messages
39
Likes
12
Location
Toulouse, France
WCA
2014GARC27
YouTube
channel/UC_3y32gRPV8mvMih-SehzUQ
#4
Definitely! Afterwards, as you got an odd number of corner targets you'll swap them one last time in the end. So they'll end up in their correct spot.
You can indeed use this technique in order to avoid parity. I personally use it only in multi but I know several people that actually use this even in standard 3BLD.
 

mark49152

Super Moderator
Staff member
Joined
Oct 29, 2012
Messages
4,516
Likes
2,937
Location
UK
WCA
2015RIVE05
YouTube
mark49152
#8
Yes it's a valid way to solve parity. A year or so back, I asked on the forum what the probabilities were of getting more or fewer edge targets. I can't find the thread now, but the conclusion was that it's generally 50/50 whether you end up doing more or fewer swaps, although there are some cases where it may be better or worse. For example, if UL is flipped in place then solving it to UB during a cycle also avoids the need to flip the edge as you would with a regular parity fix.
 
Joined
Jan 9, 2014
Messages
388
Likes
102
Location
Yo
WCA
2013GHOD01
YouTube
abunickabhi
#9
Eliminating parity is very hard , you can reduce its move count by adopting methods like 2e2e , and so on.
But suppose a U 1-move premove to eliminate parity makes tracing very hard , and makes 3BLD feel like an FMC attempt.

It is just best to choose a fast parity alg, like the J perm.
 
Top