Yes,but you have to prove by CPS like 4-colors problem

來源: jinjing 於 2010-08-20 19:07:24 [檔案] [舊帖] [給我悄悄話] 閱讀數 : (87 bytes)

回答: 魔方終於給解了：）今天的新聞裏麵說，由 idiot94 於 2010-08-13 17:13:34

Long time ago,there is one case need 20 steps.Right now 20 or less steps for any case.

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