20 HTM Solve by Tomoaki Okayama

The scramble is from the weekly competition 2012-21 on seedsolving.com. Original post.
Scramble: R’ D’ U2 B’ R U L2 B2 D L’ U R2 B’ U F2 R’ F’ R2 U’
Solution: F D F2 U2 R D’ R2 U’ R U’ L’ D L’ D2 F’ D F D U F2

NISS solve.

Pre-scramble: L’ U F2

2x2x2 block: F D F2
2x2x3 block: R D’ R’ L’

Pre-scramble: L R D R’ F2 D’ F’

2x2x2 block: F2 U’
Extra 1x2x3: D’ F’ D’ F
Finish F2L: D2 L D’
All but 3 corners: L U R’ U R U2 L’
Pre-move correction: L R D R’ * F2 D’ F’

Insert at *: R D’ R’ U2 R D R’ U2

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