Singapore Cube Championship 2019

2019-02-23 ~ 2019-02-24

comment at the time: Two lucky official solves in a row, aka getting lucky isn't a crime. ((TL NOTE: I was averaging around 28-30 at the time)) Didn't find a good solution for #3, so whatever. "Lucked out" on a 28-move ab3c (insertion cancelled two moves) near the end of the hour, because my backup solution was 40 moves long (lol). It's still a good mean by my standards.

Final

#2Mean28.33Single24 (27 / 24 / 34)

Attempt 1

Scramble

R' U' F R B2 D2 F2 L2 B2 R F2 U B R U R2 D' L U L2 R' F2 R' U' F

Results

U L B2 D B L F B R2 B' L' B R2 B2 L F' D' B2 U B2 U2 B U2 F R' D' F2

(F2 D R F') // 222 (4/4)
U L B2 D L D' // 223+eo (6/10)
B U B' U' // pF2L (4/14)
rewrite:
(F2 D R F' U2 B' U) // 222+adjust (7/7)
U L B2 D L D' // 223+eo (6/13)
B U2 B' U2 // F2L; ab4c (4-1/16)

Skeleton: U L B2 D @ L D' B2 U B2 U2 B U2 F R' D' F2
@ = B L F L' # B' L F' L' // 2 cancel
# = L B R2 B' L' B R2 B' // 3 cancel (11/27)

Kinda tunnel-visioned into trying to solve F2L, even though this should "obviously" have been done as ab4c directly. The first insertion I found was 3 cancel + 0 cancel; I had plenty of time left so I just tried other insertions. I normally don't bother with alternative insertions because I'm so slow at insertions.

I know an RUD alg for the ZBLL case in the B U B' U' version of F2L, but it's 13 moves (+1 move AUF) long, for a total of 29 moves. I didn't know at the time whether the RUD alg is optimal, but I just checked and it is. There's a different 13-move RUD alg that will avoid the AUF, but that would still be 28 moves total.

April 9, 2026 9:15 PM

Attempt 2

Scramble

R' U' F L2 D' R2 B2 D' R2 U F2 U2 R2 U R B R2 U' L D2 B2 R2 U2 F' R' U' F

Results

U' B U' L' B L' D2 B U B' D2 B' U R' D2 R U' R' D2 F2 U' D' B U'

(U B' D U F2 R B2 U') // p223 + stuff (8/8)
U' B U' // adjust + EO (3/11)
L' B L' B // ab4c (4/15)

Skeleton: U' B U' L' B L' B U @ B2 # R' F2 U' D' B U'
@ = U' B' D2 B U B' D2 B // 5 cancel
# = U R' D2 R U' R' D2 R // 2 cancel (9/24)

Like for scramble #1, I initially found worse insertions that led to a 26. I found the 26 very early, and I spent like 30+ minutes trying to find better skeletons; when I gave up on that, I looked for alternative insertions and found this 24.

April 9, 2026 9:17 PM

Attempt 3

Scramble

R' U' F U' R2 U' R2 U' L2 R2 F2 D2 U' R2 F' U L2 R U' F' U2 B L' D2 R' U' F

Results

D B2 R U' R D' R2 U2 D2 F2 U' R F R' L' F' L' F R F' L2 F R' F2 L' F2 L F' R2 B' L' U B' D'

D (D B U' L B) B2 // ? (7/7)
R U' R D' R2 D2 // ? (6/13)
U2 F2 U' R F R' // ? (6/19)
L' F' L @ F' L' F2 L F' R2 // ab3c (9/28)
@ = L2 F R F' L2 F R' F' // fin (8-2/34)

April 9, 2026 9:24 PM