26 HTM Official Solve by Sébastien Auroux

Scramble: D2 F2 L2 B U2 B’ R2 B’ L2 F’ D’ L’ B R F D R’ F2 L D’
Solution: B D B U2 R U’ F’ U R U’ R’ U F U F2 L2 R B2 R’ B L2 B’ R2 B L2 B’

Explanation
Pseudo-2x3x3:  B D B U2 R
Switch and F2L-1: R’ B2 R’ L2 F U’
3E4C: U’ F’ U

Skeleton: B D B U2 R U’ F’ U2 * F’ L2 R B2 R

Block-commutator for L3C: * = U’ R U’ R’ U F U F’
Unfortunately those L3C in 19 only give one move cancellation. I put R2 B L2 B’ R2 B L2 B’ at the end.

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