R' U' F L2 U D2 R2 F' L2 F R2 B2 U2 L B D F R' B U F U R' U' F
R U' F' U2 D2 B' R' F R2 B L2 F2 D2 R2 B D2 F D2 F' U2
R U' // EO (2/2) F' U2 D2 B' R' // DR, 4b5 (5/7) F R2 F' (U2 F D2 F' D2 F') // HTR (9/16) (U2 R2 F2 D2 B2) // finish (5/21) ... [F' B2 D2 F2 R2 U2 F] ... [] = B L2 F2 D2 R2 B // Rewrite (-1/20) Solution: R U' F' U2 D2 B' R' F R2 B L2 F2 D2 R2 B D2 F D2 F' U2 (20) 6/6/4 Nice start of the mean. Obviously, this was the first DR I found, but I postponed the finishing phase because I was trying to use some extension with fewer qts. I found a 21 from a 9+2, and then I tried some HTRs on the 4b5 — and the solution came out by itself (opt from DR). I also had some 10+1s (2e and 4e); a variation of those gave another 20, which is what Radek found. Mallard finds a 19 from an 11+0 — findable, but you wouldn’t try to use an 11 to DR to get below 20. The scramble is 17 opt, but no sub-19 looks findable. R U' // EO (2/2) B' F2 L' B2 L' R2 F // DR, 4a2 (7/9) (B2 U2 R') D2 R2 F2 L' // HTR (7/16) F2 D2 L2 D2 // Leave slice (4/20) -> +1 for 21 R2 D2 R' U' // EO (4/4) (F2 R2 B D2 L2 F2 R') // DR, 0c0 4e (7/11) (F L2 R2 B') // HTR (4/15) (D2 F2 U2 F2) // finish (4/19)
R' U' F U L' F' U' R2 U R U' F' U2 F2 D2 R2 U2 B2 U2 B' R' D R' U' F
F B' U B U R2 L2 D R L B2 R2 U' B2 U D R2 B2 R2 B2
F B' U B // EO (4/4) U R2 L2 D R L // DR, 4a1 (6/10) B2 R2 [D' // HTR (3/13) R2 D2] R2 B2 R2 B2 // Leave slice (6/19) [] = U' B2 U D // Slice (+1/20) Solution: F B' U B U R2 L2 D R L B2 R2 U' B2 U D R2 B2 R2 B2 (20) 6/8/4 That’s funny. The moment I saw this EO and the instant RZP, I smiled — and then I saw that the DR was 1qt, lmao. I had the solution quite early; I consider it quite lucky that the slice is just +1, given that there were only two moves to work with. I checked the rest, but nothing worth attention came up. This was the first variation I tried, and it’s optimal from EO. The scramble is 17 optimal too, and Mallard gets 19 only with RZP in 7, so 20 is the best findable. At this point, I just needed a 24 to secure the NR mean — the best start I’ve ever found myself in...
R' U' F R' F2 D' R2 B2 F2 R2 F D L2 U' R B2 R' U2 B2 R' U' F
D F2 D L2 B' R2 U2 B2 D' R2 B2 U2 F2 U2 F2 L2 F2 D L' B2 L2 U'
(U L2 B2 L) // EO (4/4) D F2 D L2 B' // DR, 4a2 (5/9) (D') R2 U2 B2 D' // HTR (5/14) R2 B2 U2 F2 U2 F2 L2 F2 // finish (8/22) Solution: D F2 D L2 B' R2 U2 B2 D' R2 B2 U2 F2 U2 F2 L2 F2 D L' B2 L2 U' (22) 4/4/6 That’s it. I decided to switch straightaway to this RZP in 4, and it gave the DR I needed. 22 is optimal from DR. The finish was not obvious, but after about half an hour, I had it, and I felt such relief. In the last part of the attempt, I tried working on a 9+4, only to discover it was a 9+5 — lol. Mallard finds a 19 from a niss 5-mover into a 7c8e trigger, but probably the best result you could’ve gotten is a 21 from something I didn’t try enough. (L B2 U L') // EO (4/4) -> instant rzp on FB D // DR-3c2e (1/5) B' L2 D' F' D // DR, 4a1 2e (5/10) B (D2 F' R2 L2 B') // HTR (6/16) (U2 D2 L2) // Leave slice (3/19) -> +2 opt
R' U' F R' D R2 F2 U' F2 D2 B2 L F2 L2 U L2 B2 F L' U' B2 R' U' F
D L2 F2 U2 R2 U2 R2 U2 B2 R2 D R D F2 R2 U L' F R' F D'
(D F' R F') // EO (4/4) (L) // DR-4c4e (1/5) (U' R2 F2 D' R') // DR, 4b2 4e (5/10) D' (D') // HTR (2/12) (R2 B2 U2 R2 F2 L2 &) // AB2e2e (6/18) & = (L2 F2 U2 R2 U2 F2 L2 D2) // 2e2e (8-5/21) Crazy work with these finishes. I had an early 23 from this DR and I found a way to reduce it to 23, then I saw that it was HTR in 12 and tried a lot of stuff. In the end +11 is optimal for the DR. Krzysztof found a 20 on this scramble, not sure from which DR. In the last minutes I was working on a 9+4 which was also 21 optimal.
R' U' F D' F2 U' D2 L2 F' U' B' U' R L' B2 D2 L2 U' R2 U' R2 D R' U' F
L2 B U' R' L2 F L D2 L2 B' U2 F2 L2 F' D2 F2 L2 U2 L2 U2 R U'
(U) L2 B U' // EO (4/4) (R') // DR-7c8e (1/5) L2 R' F L // DR, 4a2 (4/9) D2 L2 B' U2 F2 L2 F' // HTR (7/16) D2 F2 L2 U2 L2 U2 // finish (6/22) Looks like I have a sub for 4a2 DRs... It is 21 opt with double slice. Also the 9+4 from the same eo was 21 opt so probably left a move there. (U) L2 B U' // EO (4/4) (R') // DR-7c8e (1/5) L2 R' F L // DR, 4a2 (4/9) D2 R2 B U2 B2 L2 F // HTR (7/16) U2 F2 R L' B2 L' R' // finish (7-2/21)
R' U' F D' R2 L B D' R' U D' L2 B' R2 B2 U2 L B2 U2 R B2 F' R' U' F
B U D' L' F L' F L' F2 D2 L2 U2 R2 F2 D2 F2 L' B2 R' F2 U2 R2 F' B' L
B U D' // EO (3/3) (L' F B) // DR-3c2e (3/6) L' F L' F // DR, 4a3 (4/10) R (L2 D2 B2 R F2 R) // HTR (7/17) (D2 B2 D2 R2 F2 L2 B2 D2) // Leave slice (8/25) Solved in +0 (don't want to write it). Worst scramble of the day but mallard still gives 21 from a findable thing. This DR had 22 potential by using RLUD hackery, I tried it but not enough. With normal techniques it was 23 opt, missed that (I was just stanco). It is a sort of panic solution, I should have looked better into the first variations. B U D' // EO (3/3) (L' F B') // DR-3c2e (3/6) L' F L' F // DR, 4a3 (4/10) (F' B R' L) F' B R' L // hackery (8-6/12) F2 R2 B' U2 F2 L2 F' // HTR (7/19) U2 R2 // finish (2/21) B U D' // EO (3/3) (L' F B') // DR-3c2e (3/6) L' F L' F // DR, 4a3 (4/10) L' (L2 D2 B2 L' D2 R) // HTR (7/17) (F2 U2 B2 D2 R2 B2) // finish (6/23) B' F2 D U' // EO (4/4) B // DR-8c8e (1/5) (U2 L' B F') // DR, 4b2 4e (4/9) (D2 R) D2 F2 U2 B2 L // HTR (7/16) D2 L2 B2 R2 B2 // finish (5/21)