[Sébastien]

Nice solve! There is also a cool direct finish for another 23 (domino-style):
EO+2x2x1: U' B' * U2 L'
2x2x2: U' B
2x2x3: D2 L2 F' D2 F'
DR: D F' D F //up to here your moves, 15 total
Finish: B2 U B2 D B2 U' B2 D

Thanks, I totally missed that. So I was pretty lucky to get 23 with insertions as well.

Your second solve is pretty nice too, did you also try to approach the 6 move L9E skeleton directly? The new IF gives a 21 for this.

Are you guys ready for German Nationals?

Let's see!