Rubik’s Cube 101
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?
Notation
• U• F• L• R• D• B
• x• y• z
• u• f• l• r• d• b
U
F
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 U2 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 LayerR U R’ L’ U’ L
FF
Second Layer
• U R U’ R’ U’ F’ U F • U’ L’ U L U F U’ F’
F F
OLL (Orient Last Layer)• Dots/Half Crosses• F R U R’ U’ F’
• Crosses• R U R’ U R U2 R’
Sune vs. Anti-Sune
PLL (Permute Last Layer) Part 1
• R’ F R’ B2 R F’ R’ B2 R2
PLL Part 2
FL R B
F2 U/U’ L R’ F2 L’ R U/U’ F2
Done!
Now what?
Great Websites• Joel’s Speedcubing Site -
http://solvethecube.110mb.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/marthaurion0