#### Cubenovice

##### Forever Slow

Is there a website where I can find an explanation for the rules of FMC and how it works?

Because I see all these things like premoves and insertions and other things I've never heard about, and I'd really like to know what it all means

Cut n past from one of my previous posts ;-)

For more info on FMC read this:

http://www.speedsolving.com/forum/showthread.php?1566-Fewest-Moves-Tips-and-Techniques

this

http://www.speedsolving.com/forum/showthread.php?13599-The-FMC-thread

and check the solutions of other people in the weekly comps to see all these techniques in action.

**Caseyd**: a cancellation is when moves of parts of your solution cancel out.

example OLL - PLL:

OLL Sune: R U R' U R U2 R'

PLL (any): anything that starts with an R, R' or R2 will cancel one or more moves with the last move of the Sune

Examples:

CClockwise U perm: R2 U R U R’ U’ etc. cancels 1 move: R’ followed by R2 = R

Clockwise U-perm: R U' R U R U etc. cancels no less than three moves!

R U R' U R U2 R' R U' R U R U = R U R' U R U R U R U

R' and R cancel out and then U2 and U' is the same as U

= 3 cancelled moves

Spotting cancellations is one of the reasons for writing your FMC solutions without cube rotations.

Suppose you finish the 3rd pair with R’ U2 R and do the 4th with y’ F’ R U R’ U’ R’ F R to keep EO:

y’ F’ = R’ so you are actually cancelling two moves.

However if you write your results as R’ U2 R y’ F’ R U R’ U’ R’ F R you’ll score 11 HTM for this part

Still 11 HTM if you would write R’ U2 R R’ B U B’ U’ B’ R B in your final FMC solution ;-)

But only 9 HTM if you cancel out the R R’ and write R’ U2 B U B’ U’ B’ R B

Other cancellation tricks:

Watch out when you consecutive moves of opposite faces:

… R U R’ followed by L R UR… = … R U R’ L R UR… = … R U R’ R L UR… = ... R U L UR…

And pay attention to AUF’s too

AUF before a PLL could cost you a cancellation with the end of OLL

AUF before a PLL that ends with U is just a silly way of increasing movecount

I used OLL and PLL as examples (even though you typically would avoid ending with PLL in FMC) but offcourse they can be replaced by any moves in any part of the solution

Last edited: