Rubiks Cube 101 Ken Yuan yyuan 1uchicago edu

Rubik’s Cube 101 Ken Yuan yyuan 1@uchicago. edu

World Record?

7. 08 seconds!!

Moves needed to solve?

God’s Number is 20! • It takes 20 moves to solve the Rubik’s cube from any position. • However, what is a move?

U F

F F

L F

R F

D F

B F

f F

What’s an algorithm? • “A memorized sequence of moves whose effect on the cube is known“ • Example: R U R’ U R U 2 R’

The basic solve • The Cross • First Layer • Middle Layer • OLL (Orient Last Layer) • PLL (Permute Last Layer)

Alternatives • Petrus Method • Roux Method

The Cross • Good Cross vs. Bad Cross

First Layer R U R’ F L’ U’ L F

Second Layer • U R U’ R’ U’ F’ U F F • U’ L’ U L U F U’ F’ F

OLL (Orient Last Layer) • Dots/Half Crosses • F R U R’ U’ F’ • Crosses • R U R’ U R U 2 R’

Sune vs. Anti-Sune

PLL (Permute Last Layer) Part 1 • R’ F R’ B 2 R F’ R’ B 2 R 2

PLL Part 2 F 2 U/U’ L R’ F 2 L’ R U/U’ F 2 L F R B

Done!

Now what?

Great Websites • Joel’s Speedcubing Site http: //solvethecube. 110 mb. com/ • Speedsolving Forums http: //www. speedsolving. com/ • WCA Homepage http: //www. worldcubeassociation. org/index. php • Speedcubing Store (delivers from Illinois!) http: //speedcubingstore. webs. com/ • Cubesmith - http: //cubesmith. com/index. htm • http: //www. youtube. com/user/marthaurion 0