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https://alpha.twizzle.net/edit/?setup-alg=D2+F2+L2+D+U2+R2+D%27+B2+U+B2+R2+F%27+L2+R%27+B+R2+B%27+U%27+R2&alg=y+%2F%2F+inspection%0AU+r+F%27+D+R2+D+%2F%2F+FB+%286%2F6%29%0AM+U%27+M%27+U+r+M%27+U2+M+%2F%2F+DFDB+%2B+EO+%288%2F14%29%0AU+R2+S+R2+S%27+R2+U2+R2+%2F%2F+RB+%288%2F22%29%0AR%27+U+R%27+U%27...

I’m late to the party, but I like this solution...

https://alpha.twizzle.net/edit/?setup-alg=D+R2+F%27+L2+B+U2+B%27+R2+D2+U2+R2+F2+U%27+B2+R+B2+F%27+U2+F%27+U&alg=x2+y+%2F%2Finspection%0AD%27+B+U%27+B2+D2+r%27+U+r+%2F%2F+223+%288%2F8%29%0AU%27+R+%2F%2F+BR+pair+%282%2F10%29%0AU%27+R+U%27+R%27+S%27+U%27+S+%2F%2F+EODR+%287%2F17%29%0AU%27+R+U+R%27+U2...

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