魔方(Rubik's-cube)-英語(yǔ)演講

1、Jiang Hongmei2012.12.21Rubiks Cube is a 3-D mechanical puzzle invented in 1974 by Hungarian sculptor and professor of architecture Ern Rubik. Originally called the Magic Cube, the puzzle was licensed by Rubik to be sold by Ideal Toy Corp. in 1980 and won the German Game of the Year special award for

2、 Best Puzzle that year. As of January 2009, 350 million cubes had been sold worldwide making it the worlds top-selling puzzle game. It is widely considered to be the worlds best-selling toy. The kinds of the Rubiks CubeMini Cube 二階魔方二階魔方Rubiks Cube 三階魔方三階魔方Rubiks Revenge 四階魔方四階魔方Professors Cube 五階魔方

3、五階魔方V-Cube 6六階魔方六階魔方V-Cube 7七階魔方七階魔方Rubik Cube Mirror / Rubiks Cube 2.0 鏡面魔方鏡面魔方 Some special Magic CubesPyraminx金字塔魔方金字塔魔方 Skewb Cube斜切魔方斜切魔方 Megaminx五魔方五魔方 Irregular IQ Cube不規(guī)則魔方 Lets see the 3x3x3 cubesIt has 6 centers,8 corners and 12 edges.when we rotate any face ,we find the center is dead.Its

4、 key to sovle the puzzle.F (Front): the side currently facing the solverB (Back): the side opposite the frontU (Up): the side above or on top of the front sideD (Down): the side opposite the top, underneath the CubeL (Left): the side directly to the left of the frontR (Right): the side directly to t

5、he right of the frontThen we start to learn the CFOPCFOP is the most popular method to solve the cube :CROSSF2L-OLL-PLL1:Cross2:F2L：（：（First two Layer)3:OLL：（：（Orient Last Layer ）4:PLL：（：（Position Last Layer ）When a prime symbol ( ) follows a letter, it denotes a face turn counter-clockwise, while a

6、 letter without a prime symbol denotes a clockwise turn.1. Cross: no formula and you can do it easilyYour goal2.F2LIf you want to get the goal,you need some formulas to finish itFirst: you should do it like this.To finish it, you maybe meet many situations. If you find these, you can use the formula

7、 under the picture.（R U R）（FUF）（FUF）U （FUF）（R U R） U （R U R）Second: To get your goal.Use the formula as well.A:（U F U F ）（U R U R）B:（U R U R）（U F U F）C: You can use the A or B first ,then you can use A or B one more time.3.OLLYour goal4.PLLFirst you can use formula D (R B R F2 R B R F2 R2) again and again to do that.You will see that picture.Then you