I got this problem from a book and thought this was quite interesting. This is my first problem, and please tell me if I have missed anything!
(;AP[goproblems]AB[bq]AB[bp]AB[ap]AB[cp]AB[dq]AB[eq]AB[er]AB[es]AW[br]AW[cr]AW[cq]AW[dr]AW[ds]AW[aq]AW[dp]AW[do]AW[co]AW[bn]C[Black to kill the white stones in the corner.](;B[bs];W[ar](;B[as];W[cs](;B[bs]C[RIGHT])(;B[as]C[RIGHT]))(;B[cs];W[as](;B[bs]C[RIGHT])(;B[cs]C[RIGHT]))(;B[an];W[bo])(;B[ao];W[bo]))(;B[ar];W[bs](;B[aq];W[bo])(;B[an];W[bo])(;B[ao];W[bo]))(;B[as];W[bs];B[ar];W[aq];B[ar];W[bo];B[aq];W[ao])(;B[cs];W[bs]))