Do we know where the 12-15 move estimate for 223 came from? I’ve seen it repeated a lot. Is it for a fixed orientation or something? I’m certainly not a high level solver, and I would consider a 15 move 223 kinda bad. I’d expect optimal solutions to be something closer to 9-12 moves on average...
R U B2 R F // FB (5/5)
U2 r U' M2 U M // DFDB + BR pair (6/11)
U' f' U' f // EODR (4/15)
R U R' U R U' R' //LXS (7/22)
U2 R' U' R U' R' U2 R U' R' U2 R' D' R U2 R' D R2 U' // ZBLL (19/41)
or you can cancel into WV instead of just solving the pair
R U B2 R F // FB (5/5)
U2 r U' M2 U M // DFDB +...
More straightforward APB this time and a much narrower ZBLL alg lol
x2 // inspection
M' B F D F // FB (5/5)
U r2 U' M // DFDB (4/9)
U' f R f' // BR pair (4/13)
F R U R' U' F' // EO (6/19)
R U R' U2 R' U' R2 U R // LXS (9/28)
U2 R' U' R U' R' U2 R // ZBLL (8/36)
Next: B D2 F L2 B2 L2 F D2 F L2...
The 223 solution happens to solve EO, and then it's just BR pair canceled into LXS. I just used whatever cubedb suggested for the zbll, but it looks like that is the top alg on zbll explorer.
x2 y // inspection
U2 B' U F2 U L U' L' U2 F' // 223 (10/10)
U2 R' U R' U R' U' S' U2 S // RB (10/20)
U' R' U R2 D R' U R D' R' U2 R' U R U R' U' R // ZBLL (18/38)
Next: F2 R D L2 U2 B2 U B2 D B2 D2 L2 F2 U B' L B2 F' L' R' B2
B2 R' U D R' F D' // FB (7/7)
U2 r2 U' M2 // DFDB (4/11)
U2 f R f' // dBR (4/15)
U2 f' U' f // EO (4/19)
R U' R' U R U2 R2 U' R U R // LXS (11/30)
U2 R U2 R D R' U2 R D' R2 // ZBLL (10/40)
Next: B2 U' B2 U F2 D' F2 L2 B2 D2 L2 B U B2 R' U' L2 F D2 B
Also found this solution that is more...
x' y2 // inspection
F2 U' D r U' R D R2 r U' r2 U2 r' // 223 (13/13)
R' // dBR + dFR (1/14)
U2 S' U' S // EODR (4/18)
x' M' U' R U L' U2 R' U2 R U2 // ZBLL (10/28)
lol
Next: F2 R2 F2 D R2 U' F2 R2 U2 F2 D2 F L U2 R D' R D F D2 U2