Cride5
Premium Member
When solving ZZF2L I find myself inserting C+E pairs into 'open' slots almost as often as closed ones. Although it can improve efficiency, the main reason I do it is for lookahead. Where an initial 1x2x2 belongs in a front slot, I normally place it into the back to fill up the hidden edge positions (BL and BR).
Although I've been doing this for quite a while, I've never actually looked at the best algs for solving into an open slot. While some of the cases are best solved by closing the slot and executing the normal alg, many cases can be more efficiently solved by an alg optimised for this situation.
All cases are presented below for completeness, however some of them can probably be ignored. Some are based on just closing the slot, while others can be easily worked out through intuition.
Basic Cases
(U) L' U R U' L . . (5f)
(U) R U2 R' U' R . . (5f)
(U) R' U L U' R2 U L' . . (7f)
(U) R2 D R' U2 R D' R' . . (7f)
(U') R U2 R' U' R U R' U' R . . (9f)
R2 U2 R2 U' R2 U' R' . . (7f)
R U R' U' R U' R' U' R . . (9f)
R U2 R' U R U R' U' R . . (9f)
R B2 U L U' L' B2 . . (7f)
(U') R U2 R' U R U' R' U R . . (9f)
(U) R' U2 R2 U R2 U R2 . . (7f)
(U') R U' R' U R U' R' U R . . (9f)
R U R' U2 R U2 R' U R . . (9f)
R B2 U2 R B2 R' U2 B2 . . (8f)
Corner Trapped
R U2 R' U R . . (5f)
R U' R' U' R . . (5f)
R U L' U R' U' L R . . (8f)
L R U' R' U L' U R . . (8f)
R U R' U' R U' R' U R . . (9f)
Edge Trapped
R U R' U' R . .(5f)
R U' R' U R . . (5f)
R U R' U R U' R' U' R . . (9f)
(U') L' U2 L F2 R' F2 R2 . . (7f)
(U') L' U2 R U2 R' U2 L R . . (8f)
Both Trapped
R' U2 R' U R U' R U2 R2 . . (9f)
R2 U2 R U' R U R' U2 R' . . (9f)
F2 U' F2 R' D R' D' R' . . (8f)
R' D' R' D R' B2 U' B2 . . (8f)
R U' R U2 R2 U' R2 U' R' . . (9f)
R' U' R2 U' R2 U2 R U' R . . (9f)
R U R2 U2 R U R' U R2 . . (9f)
R2 U R' U R U2 R2 U R . . (9f)
Connected Cases
R U' R' U' L' U R U' L . . (9f)
R U R' U2 R U' R' U' R . . (9f)
F R B R' F' R B' . . (7f)
F' R B R' F R B' . . (7f)
(U') R U R' U' R U R' U' R . . (9f)
R' U' R2 U' R2 U2 R2 . . (7f)
R U' R' U2 R U' R' U R . . (9f)
(U) R' U' R U' R' U2 R2 . . (7f)
(U) R' U2 R U R' U R2 . . (7f)
R B2 L U L' U' B2 (7f)
(U) L' U2 L U L' U L R . . (8f)
R U R' U' R U R' U2 R . . (9f)
(U2) R U R' U2 R U R' U' R . . (9f)
Although I've been doing this for quite a while, I've never actually looked at the best algs for solving into an open slot. While some of the cases are best solved by closing the slot and executing the normal alg, many cases can be more efficiently solved by an alg optimised for this situation.
All cases are presented below for completeness, however some of them can probably be ignored. Some are based on just closing the slot, while others can be easily worked out through intuition.
Basic Cases
(U) L' U R U' L . . (5f)
(U) R U2 R' U' R . . (5f)
(U) R' U L U' R2 U L' . . (7f)
(U) R2 D R' U2 R D' R' . . (7f)
(U') R U2 R' U' R U R' U' R . . (9f)
R2 U2 R2 U' R2 U' R' . . (7f)
R U R' U' R U' R' U' R . . (9f)
R U2 R' U R U R' U' R . . (9f)
R B2 U L U' L' B2 . . (7f)
(U') R U2 R' U R U' R' U R . . (9f)
(U) R' U2 R2 U R2 U R2 . . (7f)
(U') R U' R' U R U' R' U R . . (9f)
R U R' U2 R U2 R' U R . . (9f)
R B2 U2 R B2 R' U2 B2 . . (8f)
Corner Trapped
R U2 R' U R . . (5f)
R U' R' U' R . . (5f)
R U L' U R' U' L R . . (8f)
L R U' R' U L' U R . . (8f)
R U R' U' R U' R' U R . . (9f)
Edge Trapped
R U R' U' R . .(5f)
R U' R' U R . . (5f)
R U R' U R U' R' U' R . . (9f)
(U') L' U2 L F2 R' F2 R2 . . (7f)
(U') L' U2 R U2 R' U2 L R . . (8f)
Both Trapped
R' U2 R' U R U' R U2 R2 . . (9f)
R2 U2 R U' R U R' U2 R' . . (9f)
F2 U' F2 R' D R' D' R' . . (8f)
R' D' R' D R' B2 U' B2 . . (8f)
R U' R U2 R2 U' R2 U' R' . . (9f)
R' U' R2 U' R2 U2 R U' R . . (9f)
R U R2 U2 R U R' U R2 . . (9f)
R2 U R' U R U2 R2 U R . . (9f)
Connected Cases
R U' R' U' L' U R U' L . . (9f)
R U R' U2 R U' R' U' R . . (9f)
F R B R' F' R B' . . (7f)
F' R B R' F R B' . . (7f)
(U') R U R' U' R U R' U' R . . (9f)
R' U' R2 U' R2 U2 R2 . . (7f)
R U' R' U2 R U' R' U R . . (9f)
(U) R' U' R U' R' U2 R2 . . (7f)
(U) R' U2 R U R' U R2 . . (7f)
R B2 L U L' U' B2 (7f)
(U) L' U2 L U L' U L R . . (8f)
R U R' U' R U R' U2 R . . (9f)
(U2) R U R' U2 R U R' U' R . . (9f)
Last edited: