#### Cride5

##### Premium Member

I currently do most of my ZZ F2L intuitively using block building, but when you get to the last slot and you end up with a nasty connected case things can get a bit confusing, so I thought I'd post my algs for dealing with these situations without affecting the edge orientation.

The algs assume that both connected blocks are on the U layer and positioned directly over their slot (front right). They don't apply to connected corner and DF-edges, only middle-slice edges. If the connected cases are for the back, or front left slots the algorithms will need to be modified/reflected accordingly - this is assuming the cube isn't rotated during F2L The first parts in brackets position the block before insertion, so may not be necessary ... here goes:

I was struggling to find anything better for case 4, does anyone know a shorter one??

EDIT: Provided by blade740 and Lucas Garron

EDIT2: Two more interesting cases:

The algs assume that both connected blocks are on the U layer and positioned directly over their slot (front right). They don't apply to connected corner and DF-edges, only middle-slice edges. If the connected cases are for the back, or front left slots the algorithms will need to be modified/reflected accordingly - this is assuming the cube isn't rotated during F2L The first parts in brackets position the block before insertion, so may not be necessary ... here goes:

- SAME COLOUR TOP

(U') R' U2 R' U R' U' R U2' R

(U R U2 R') U R U R' U2 R U R'

- OPPOSITE COLOURS TOP, COLUMN CASE

R' U2 R2 U R2 U R

- OPPOSITE COLOURS TOP, 'L' CASE

(U') R U' R' U R U R'

- DF CORNER TOP, SAME COLOURS SIDE

(U2) R2 U2 R' U' R U' R2

U2 R' U2 R U R' U R2 U R'

U' R' U' R U' R' U2 R2 U' R'

- DF CORNER TOP, OPPOSITE COLOURS SIDE

R U2 R' U' R U R'

I was struggling to find anything better for case 4, does anyone know a shorter one??

EDIT: Provided by blade740 and Lucas Garron

EDIT2: Two more interesting cases:

- Where the corner is in place, with correct orientation, but edge is in the top face. Here's the alg (with edge in UF)...

R' U' R' U' R2 U R U R

(U2) R' U' R2 U' R2 U2 R2 U R'

(U') R2 U R2 U R U' R U' R2

(U') R' U' R' U' R' U R U R

(U) R U' R2 U2 R2 U R2 U R

(U) R2 U R' U R' U' R2 U' R2

(U) R' U' R' U' R U R U R

- Where the edge is in place, but the corner is in top face, oriented with down-face on up-face. The alg (with corner in FRU)..

R2 U R2 U R2 U2 R2

(U2) R2 U2 R2 U' R2 U' R2

Last edited: Mar 6, 2009