(D' R' D F L')
(F2 L2 F2 U')//2c4 (9)
(F') R2 B R2 U2 [F L2 F']
U2 L2 F2 L2//S slice (21)

[]->B D2 B' (21)

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

optimal is 20 from a different variation of the DR... that makes 3/3 solves this week where I failed to find optimal, smh

I didn't have any other DR on this scramble

(B' F L' R B')
(D2 F2 D L2 U)//2c3 (10)
D2 [L' U2 B2 L'] F2 L'
D2//this is not a double slice (18)

backtrack a bit:

D2 L' U2 B2
R U2 R2 D2 R D2//now it's a double slice (20)

D2 {L' U2 B2 R U2 R2 D2 R [D2 U' L2 D' F2 D2]...

[]->D B2 D U2 R2 U D 

{}->R' F2 U2 R F2 R2 B2 L' R2 (22)

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

-------

D2 [L' U2 B2 L' F2 L'] D2 U' (1) L2 D' (2) F2 D2

^from the above sequence I also considered adjusting (1) and (2) to give double slice, but both also resulted in 22. 

Turns out optimal from EO requires:

[]->L U2 B2 L2 U2 L//i did not consider this, then the DS solves in 20...


other:

U (U2 B U)
(R' F) L2 B2 U2 F'//4b2 (10)
(R2 F2 U2 R U2 B2 R')
(D2 L2 U2)//20 to double slice

(R' U) F' U'
L' (R B' R' B' R)//4b2 (10)

(L) D' R F' L'
(B2 U' B2 U')//4c4 (9)
F' D2 F (D2 L2 B U2 R2 B')
(U2 R2 B2 R2)//solve (22)

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

I found this quite early and I moved on. Turns out optimal is 21 but you have to do the qt reduction in a way that creates the U2 parity:

(L) D' R F' L'
(B2 D' R2 D')
F D2 F (F2 U2 F R2 D2 F)
(L2 F2 U2)//21

I just didn't think it was worth checking after already getting +13 on this, welp

other:

(L' F R U B)
(L U F2 L2 D R)//4b2, this is 21 opt with a very interesting trick that I forgot existed:

D2 [R2 D R2 F2 L2 B2 U B2 R2 L2]//M slice, I found up to here

[]->R' L' F R2 U2 L2 D2 B D2 L' R// you can slice through the HTR trigger because it's 0e

(U' F' R L B)
(U L2 R' U R)//4b2 (10)

D F U' R' U
L F2 U2 B' D2 L//2c3 (11)
(R2 F' D2 B' D2 L2 B)
(R' L' F2 L' R)//22 to slice but no +0

(U') F D F' D
(R2 B R F)//4b5 (9)

(F D2 R' B)
B2 R L D F2 R'//2c3 using 6c6e trigger :D (10)
(U2 B2 U']) U2 F2 L2 D' L2 U'
B2 R2//2e+E

[]->(F2 D2 F2 U) //22 to slice

...[U2 F2 L2 D' L2 U'] B2 R2 U' F2 D2 F2

[]->U D R2 F2 D' F2 D' (23)

Final: B2 R L D F2 R' U D R2 F2 D' F2 D' B2 R2 U' F2 D2 F2 B' R D2 F'

optimal finish boo

I had this other DR but it was bad:

B (D2 B)
R (L' D R2 B2 U L)//4b5 or something

F' D' B L U'
(B2 D2 L2 F2 B' L)//4a2 (11)
([B2 U2 B R2 F2 L2 D2 F')
(D2 R2 F2])//22 to S

[]->(U2 B2 U2 F' L2 B2 U2 F R2 U2 F' B' ) (23)

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

optimal finish

i didn't really have any other DR worth looking at...

F' L D R'
(L2 R2 D B U')//4b2 (9)
U2 [B D2 L2 R2 B'
U2 R2 U2 R2 B2] L2//21 to S

[]->F L2 U2 D2 F2 B L2 U2 L2 U2 B F (23)

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

the trend of getting screwed over by slice continues even after Asian Champs...

optimal is 22 with a 4q pathway that I didn't try, oh well.