4X4-打破機率之OP傳說~研究中~ - 魔術方塊

Hi all,

如同先前幾篇文 daleleu 提到的,單邊反轉是因為 EO 奇數或偶數所造成的

在 Chris Hardwick 的網站中 ( WCA 首頁的 Chris Hardwick corner )

有提到 OLL Parity (就是單邊反轉)形成的原因,原文節錄如下

http://speedcubing.com/chris/4speedsolve3.html

OLL parity

This is the parity that is caused by solving the centers such that the edge
permutation is odd. If the scramble has the edges in an even permutation and
you solve the centers in an odd number of inner face quarter turns you will
cause the orientation parity. If the scramble starts with the edges in an odd
permutation and you solve the centers in an even number of inner face quarter
turns then you will also cause the parity.

This parity is not caused by the centers. I've seen that erroneously stated
on many different sites and posts on the group. The one-edge flipped parity
is caused by solving the centers such that the edge pieces are in an odd
permutation.


簡單來說,單邊反轉的成因:

假設在打亂(scramble)的時候,對所有的 edge (小edge) 作了偶數的轉動

而當妳組中心的時候,對所有的 edge 作了單數的轉動,這時候當你組好邊

你的3x3x3部分,所有的 EO , 就會是奇數,那麼這時候就要對其中一個邊作單邊反轉

才會讓 EO 成為偶數, 而 3x3x3 的部分才會有辦法解出來.


所以中心並不是影響到單邊反轉的成因,嚴格來說是邊才對.(或邊跟組中心的動作)

但是跟中心的錯置並沒有關係.



================

不知他是誰的請 google 一下,他應該是第一個盲解6x6x6成功的人,而且是

在2007年世界大賽第一次拿到6x6x6當晚就成功了

http://www.worldcubeassociation.org/results/p.php?i=2003HARD01

WCA Profile 可以看看他大方塊盲解的功力

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