A speedsolving method
The ZZ method
First all edges become good and a line goes on the bottom, then the blocks are built with only R, U and L. Zbigniew Zborowski invented the method in 2006.
A solve in four stages
Edges
All good; bad ones are purple
Line
Two edges on the bottom
Blocks
Two layers with R, U, L
Top
The cross is already there
The plan: 0 of 6 done
How it differs
›You never rotate the cube before the top layer: after the first step R, U and L are enough. A solve takes 45 to 60 moves on average, depending on how you do the top.
›The yellow cross is always ready when the blocks are done. The top needs 13 formulas, and full PLL is already in CFOP.
›The first step is the hardest: you have to see bad edges quickly during inspection. And the pieces on the left and at the back are harder to spot than in CFOP.
How to hold the cube
The diagrams have yellow on top, white on the bottom and green at the front. The line is the white edges with green and blue. Do not rotate the cube before the top layer.
Where this comes from
The plan and the rule for bad edges come from the ZZ tutorial. It gives few moves in text, so the moves on the cards were found by search on a model cube and checked on it. The top-layer formulas are in SpeedCubeDB. Real cubers have not reviewed this section yet: if something is unclear, please tell us.