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来自oscar，oka的信 [复制链接]

风铃草fz

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电梯直达

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发表于 2013-8-8 11:30:54 |只看该作者 |倒序浏览

本帖最后由风铃草fz 于 2013-8-14 20:38 编辑

4个月前抱着侥幸给oscar发了一封信，问些关于全预判的方法
他也回了我几封。。就突然没信了
直到昨天他突然回我，问了些我的视频。。然后今天早上起床就看到他的回信。。

Wow~~~!!!

That was amazing to watch! I absolutely adore your turning style, you make sub 4 look SO~~ easy.

From the footage I saw you should just work on pausing less during execution, (you have like 1-2 regrip pauses before you get to LL where you have a recognition pause) but those pauses will slowly go away when you do a few thousand more solves (as you'll get used to doing those regrips faster). but beside that it looks really good, your solutions are good for every scramble as far as I can see, and execution is good, except it looks like you are still a bit "inexperienced" but that will go away with practise, keep up the practise you are already doing, it looks REALLY good, you have potential to do sub 3.5 average EASILY if you keep practising, just give it half a year or so.

Is it okay if I post http://www.tudou.com/programs/view/5Iko9S86FhU/?FR=LIAN on Speedsolving.com forum?

怎么说，真的对我这一年来对金字塔的理解是一个很大的肯定。快高三了，争对他说的几千次练习可能做不到了，至少是对自己一个交代吧。

（以下内容在有金字塔基础上看。。）
然后是一些他发的关于全预判的方法

Hello Yi Wang,

thanks! What do you mean by "all prognosis"? like seeing the whole solve during the inspection? I'm out of practise for that, so right now I do that like 1/6 solves, but I used to do it for 4 out of 5 solves

- -不知道全预判怎么说
What is your thoughts?Did you remember many conditions? （我问的问题）

Hello,
Can you please introduce yourself?
I only know the last 3 edges algorithms. I find that one-looking is not THAT hard if you know how to do it correct (it requires tracking 1-2 pieces 1-5 moves or so)
I usually do the same.

然后我introduce完就没音了。。

Hi Wangyi,

I'm sorry for my late answer.

It is very hard to explain the technique used for one looking, but I'll try to simplify it:
Learn how all the simple tricks used to finish all the centers+top affects the last layer edges.
During inspection you usually have a solution consisting of a few intuitive moves combined with some tricks.
You track your last layer edges the few intuitive moves, since you already know how the tricks used to finish up the top+centers affects the LL edges you can actually already predict the Last 3 edges case.

Please note that tracking 1 edge is sufficient for permutation of LL, tracking 2 edges will also give you the orientation of it, there is never a need to track more than 2 LL pieces.

Best Regards
Oscar Roth Andersen

（这是昨天回的。。应该有点用。。我的英文水平其实也没看太懂。。主要是只要跟踪两棱）

这是oka的

1Watching your video, I was surprised that you understand my method
almost completely.
But there are still some way to improve.

In both your solvings in the video, the third edge piece was putted
around the top center piece when you finished the second step (turning
three bottom-face center pieces). That is bad case. There is a way to
avoid this bad case. I always change the order of turning center pieces
(second step) to avoid this bad case, if I realize in inspection.

And, the algorithm you used in the video should be handle like that the
picture show.

Perhaps, my english is not good and you can't understand...

（我拍了个视频给他。让他帮我找下问题。事实上上海赛还是没有学会oka法。。回家后的一霎那懂得
这是他最开始跟我讲怎么避免特殊情况

然后我没懂。。他又画了图。。这图蛮好懂的）

2> I see .but if the first step have not been finished ,it will be not easy
> to observe ,is there any ways to solve ?

It's need practice to recognize if it's bad case or not in inspection
(about 12sec), but it's possible because I can do it.

>I want to know these five condition‘s technique.

I use the only algorithm for condition 2.
2. UL'U'L-R'LRL'

（”>“后都是我问的）

3I always avoid such case, with the technique I explained yesterday.
But if you have to do the case 4 or 5, RU'R'U-L'R'LR is the best way, I
think...

再睡一会儿 wrote:
> What to do 4.5？They are hard to do.
（4.5是我画的两个图。。就是oka的两种特殊情况）

4Such case is not very bad. The number of moves to finish the second step
is 2 moves smaller than worst case (in which three centers need to
turn). So, even though it become the bad case, it's not very bad.

But sometimes I chose the other way. I turn center already placed
correct position to incorrect position on purpose, so that I can avoid
the bad case. It's difficult to explain.
（我是问他说如果很简单就做成特殊情况怎么办）

5>How to return first step when you return three bottom-face center pieces？
You can do step 1 and step 2 at once　with practice.

> U' L U' R B' L R' U l b u'
U is the green,red and yellow center, and two incorrect centers are R and B.
BbL'ULRr'-DRU'R'u'-xUL'U'LR'LRL'
（实例）

6It's very difficult to explain.
I used a technique in the solving. Turning two centers to same direction
(clockwise or counter clockwise) makes one edge flip. Try following
examples:

(1) scramble: R'DL'R'L solve: RD'R (Turn two centers to same
direction and flip one edge)……

(2) scramble:R'DR'BD'B'U solve: y'ULR(Turn two centers to same
direction and flip one edge)……

The solving I send you yesterday is very like (2) after do BbL'.
So, meaning of BbL'ULRr' is:
BbL' make case (2)
　ULRr' Turn two centers to ……
In the examples, U is the green,red and yellow center.
（我也忘了问了什么。。应该还是实例吧）

7>
再睡一会儿 wrote:
> What is your technique ?Is"Turn two centers to same
> direction?" use two hands at the same time to do?

No. The technique is a part of the solvings like:
RD'R in (1),
LR in (2),
ULR of the solving (BbL'ULRr'-DRU'R'u'-xUL'U'LR'LRL') for the
scramble you send me (U' L U' R B' L R' U l b u' )

Just try the algorthm I write as solving.
（、我都不知道是在讲什么了- -）

8scramble

F is blue, D is yellow)
solve

F is green D is blue)R'D'R'LlRr'DxU'RUR'u

I solved like that↑. But I don't think it's best way.

再睡一会儿 wrote:
> U L U B L B' U L l' r u'
> How do you return l' r u'?

（实例）

差不多了。。翻之前的邮件感慨万千。。

还有一些我发给oka我觉得难的打乱。他的解法。。10几20个吧。。我也忘了。。然后是用skype发的，我这边已经没有存了，只能问问oka那边还有没有- -

大家加油吧！塔很好学的，基本没有公式。。把这个好不容易的金字塔区顶起来！