Weekly competition 2007-46 (2,3,3OH,4,5,BF,SQ1,MG,MMG,FMC,MM,PM,Relay)

Thanks for the congratulations Guus.

The only reason I can keep up with Per and you is because I find better beginnings most of the time. That gives me a lot of opportunity to try many things for F2L that influences the last layer. I don't understand how Per and you can solve the last layer in so few moves. I looked at the cube after Per's "quasi F2L" and your F2L and I would never have found those solutions.

I also tried the two insertions you found, but both give me 3 cycled corners. Am I doing something wrong?
 
Jack Moseley

2x2x2: 6.33, 6.86, (4.63), (7.28), 7.06 = 6.75

3x3x3: (18.59), (16.34), 17.65, 16.34, 16.71 = 16.90

3x3x3 OH: 31.53, 29.58, (25.41), (37.80), 29.43 = 30.18
Did the wrong OLL on 37.80.

Pyraminx: (11.68), (17.77), 11.69, 13.46, 13.00 = 12.72
 
AvGalen said:
Rama said:
Rama Temmink

3x3 OH: 22.47 20.80 21.32 25.01 21.25= 21.68
:)

I also did 5x5, but I lost the times.(Practising the Van Galen method)
Click to expand...
Were they good times, or were they as "bad" as these times :)
Click to expand...

I am around 2:55.xx avg with your method, I still have to get used to the M/M' moves and looking for the edge pieces is quite diffirent, I don't know if I should look at the L face or the R face first.
 
AvGalen said:
Thanks for the congratulations Guus.

The only reason I can keep up with Per and you is because I find better beginnings most of the time. That gives me a lot of opportunity to try many things for F2L that influences the last layer. I don't understand how Per and you can solve the last layer in so few moves. I looked at the cube after Per's "quasi F2L" and your F2L and I would never have found those solutions.

I also tried the two insertions you found, but both give me 3 cycled corners. Am I doing something wrong?
Click to expand...

Arnaud,
My usual mistakes, I swapped D and D'. the insertions were:
F' R F L2 D' F B2 L U L' U' R B'.U2 B' U B R B. R' B' U (22)
at 1st dot: B' D' B U' B' D B U ==> 28
at 2th dot: D R' U R D' R' U' R ==> 28
Gus
 
Hi :-)

Well i also had pure f2l start (17) with the same block start but it didn't lead to anything nice...

I believe Guus knows all 10 or better LL algs. I know quite a few ways to search for those short algs (i use a second cube - and make use of symmetries). Insertions finish should almost always beat a direct solution if done well ;-)

-Per
 
Guus doesn't know all of those 10 or less moves LL algs. He knows many of them, but he hasn't finished learning them.

I would appreciate it if you could explain some of those ways to find those short algs in the how-to topic.

And insertions always beat a direct solution. Let's say you have a 25 move almost-solution that can be finished with an 8 move direct solution. That means that there are 25 moves you can try finishing whatever those last 8 moves would do and you have a chance of shorter algs and cancellations before and after the insertion. If no insertion during those 25 moves work you can alwost insert it after the 25 moves :)
 
Hmm ....

I cannot give away all my secrets ;-)

Here are only a few:

Setup + Y-commutator (R' F R F')
Setup + Z-commutator (R F R' F')
Setup + Sune
f2l-c/e 's rearrangements
etc etc ...

Your *proof* that insertions always beat direct solutions is flawed. A direct solution doesn't always have a part that may be inserted.

Have fun!!

-Per
 
AvGalen said:
Guus doesn't know all of those 10 or less moves LL algs. He knows many of them, but he hasn't finished learning them.

I would appreciate it if you could explain some of those ways to find those short algs in the how-to topic.

And insertions always beat a direct solution. Let's say you have a 25 move almost-solution that can be finished with an 8 move direct solution. That means that there are 25 moves you can try finishing whatever those last 8 moves would do and you have a chance of shorter algs and cancellations before and after the insertion. If no insertion during those 25 moves work you can alwost insert it after the 25 moves :)
Click to expand...

Arnaud, Per,

I did know all 10-move algs at WC2007 but since then I forgot some of them.
At my next official FMC competition I will learn them again.

Gus
 
Chris Hardwick
--------------
fewest moves

D B' D F L' B2 R B' R' U R2 L' D2 L U L' D2 L D' R D U' B U B R' B' R' B2 L' B R2 B' L B R' B2 U' (38 HTM)

2x2x2: D B' D F L'
pseudo 2x2x3: B2 R B' R' U R2 . U
orient remaining edges: D' R D U' B U
permute remaining edges: B R' B' R' B' : R B2
align the pseudo blocks at the end: U'

This leaves two orientation balanced corner 3-cycles. Now insert [L' D2 L U L' D2 L U'] at the dot to solve 3 corners and cancel 2 moves. Insert {B' L' B R2 B' L B R2} at the colon to solve 3 corners and cancel 2 moves.

I can honestly say I like solving with an edges first strategy. I will keep trying this to see if can improve.

Chris
 
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