New FMC-ER at BW Open 2013

[Renslay]

Oh snap, this is an awesome way of explaining it

Thanks. And congratulation, Whauk!

 

[antoineccantin]

I still don't understand D:

 

[Renslay]

I still don't understand D:

Okay. Let's see a counter example. A write down this as my solution:
U2 R D2 L2 R B2 L F2 R' B2 D2 B' L F L' D' L F D2 F' U2 F D2 L U L' D2 L U' L' D2

Which is 31 steps, fair enough for me. But actually, it is nothing more, than:

[inverse scramble] + F' U2 F D2 F' U2 F D2 (commutator for 8 corners) + L U L' D2 L U' L' D2 (commutator for put them back)

This solution would be cheating, since I used the given scramble in my solution, I get an opportunity of it's shortness. If I wouldn't know the given scramble, I wouldn't be able to create such a sort solution.

Moritz used the result of the scramble, not the scramble itself. And he used the result of the inverse of the scramble. Not the moves in the scramble itself. If those moves would be different (but resulting the same scrambled cube), that would not effect the way how Moritz found the solution. Again, if I would change the scrambling into a 200 moves long one, Moritz would found the 21 step solution just as easy. However, I would be in trouble, since my soultion would be more than 200 moves with the same strategy.

Show me any scrambled cube (without showing how you scrambled it!), and I give you an inverse to it by myself. Therefore, I can use the result of the inverse (as a new scramble) whenever I want. Using the result of an inverse of a scramble is not equals to get an unfair opportunity of using the moves in the scramble itself.

 

[guusrs]

wow, Congratz Moritz

 

[whauk]

thanks for all your kind words
i missed ER for OH really close sometimes. now that it is out of my reach i never expected to get a european record in my cubing career. when i found the solution i was like "oh thats really short, probably NR". my hands started shivering as i wrote down the solution. then i counted and was like "WTF 21" and the guys at my table told my that it was ER and 2nd in the world. i quintuple checked what i wrote down and handed in my solution after ~20 minutes. the rest of the time i wished i had checked it once more and hoped that everything was right and readable xD.
well ERs dont last forever but i will always be the first person to have made a 21 in FMC (which is god's number +1 and therefore very special)
and btw 17 was optimal...

 

[Robert-Y]

Congrats again Moritz!

Too bad Sebastian doesn't even have NR in FM which is a bit surprising...

Off-topic: Reminds me of the time in 2007 when Ron broke the 333 single WR and left Erik in second place in the world but no NR

 

[Cubenovice]

i quintuple checked what i wrote down and handed in my solution after ~20 minutes. the rest of the time i wished i had checked it once more and hoped that everything was right and readable xD.

That must have been a very nerving wait for the results confirmation

May I ask why you made the switch after the XX-cross?
When Linus posted your solution I found a 28 mover straight of your XX-cross.

Start on Normal:
Double X-Cross: R2 U' B D2 B' D' L' B D'
From there:
R D' R2 D - F2L-1
F' U F U' - edge play
R2 U' R' U R2 - leaves 3 corners in 22 moves
Insertion for 28 HTM.

Anyway, from now on I will have a look at switching even if the continuation on the normal scramble looks good

 

[whauk]

yes you may well the obvious 4-move 2x2x2 didn't lead to sth on the normal nor on the inverse. (some blocks are there but i didn't see a good way to join them).
then i found the double x-cross with 2 possibilities (you can finish it with B D' or D' B). B D' leaves one block more but i wanted to check both on inverse first before forgetting it due to a decent continuation.
i just switch whenever i finish sth (or when lots of blocks appear). what you wrote down would probably have been my solution if i didn't find the 21.