posetcay:
I think this is not a very good problem, it is too open after S4-R5. Maybe add more stones outside.

Farkas:
best solution: after Bb16 Wc15 Ba16 Wb19, Black c13 captures the 4 stones. Followups: Wb13 Bb14 Wc14 Bd14 Wa14 Ba15 Wb14 Bb12 Or if Wc14 first, then Bd14 Wb13 Bb14 Wa14 Ba15 Wb14 Bb12

Farkas:
SGF

totbeibrot:
last move: r7 captures the 4 stones. so it should be superior to the solution

gotrainth:
I added more ways to resist.

gotrainth:
SGF