[priazz]

1. R’ U' F R L' U B' D' L2 D L' B D' F2 U F2 R2 U R2 D' F2 B2 U' R' U' F

F B2 L // sq+pair
(D F2) // 321 + sq
U F’ U2 // bloc
(L’ D L2) // pF2L-1
B’ R D’ * R’ B’ D’ // 3c 17

*: D’ R U R’ D R U’ R’ // 8-2

sol: F B2 L U F’ U2 B’ R D2 R U R’ D R U’ R2 B’ D’ L2 D’ L F2 D’ (23) 


2. R' U' F L D2 R2 U R2 F2 L2 U2 B2 D B' R' D' L2 F U' F2 L' U2 R' U' F

R D F U R // EO
D’ U2 B’ D2 F2 U’ L2 U2 F // DR
D2 U’ R2 D R2 F2 U’ L2 U’ L2 U2 L2 U’ L2 U’ // backup

sol: R D F U R D’ U2 B’ D2 F2 U’ L2 U2 F D2 U’ R2 D R2 F2 U’ L2 U’ L2 U2 L2 U’ L2 U’ (29)


3. R' U' F R U2 F2 L' R F2 U2 F2 L F2 R' B' U' B2 U F D2 F D U' R' U' F

D // 
N //
F //

sol: DNF

---------------

23, 29, DNF = DNF

comment: I had a lot of fun with blocks on the first one so I decided to go for the same approach on the second attempt and ended up wasting a lot of time. I had a longer 3e3c from Sebastiano's start and the same 4c in 19 Sebastien got, but I thought it would not beat the 29 I had by much so I didn't bother to insert. The third one was dreadful.