(;AP[goproblems]AB[ao]AB[bo]AB[co]AW[bp]AW[bq]AW[br]AB[cq]AB[cr]AB[cs]AW[dr]AW[ds]AW[es]AB[er]AW[fr]AW[fq]AB[eq]AB[dp]AB[ep]AB[fp]AW[hp]AW[gp]AW[hr]AW[fo]AB[eo]AW[an]AW[bn]AW[cm]AB[cn]AW[am]AB[dn]AW[dm]AW[em]AW[en]AW[gn]C[White to do something useful](;W[cp](;B[dq]C[CHOICE](;W[ap];B[fs];W[do]C[Black cannot escapeRIGHT])(;W[fs];B[bs](;W[ap]C[RIGHT])(;W[ar];B[ap]C[Seki])(;W[aq];B[as]))(;W[bs];B[fs];W[ap]C[Black cannot escapeRIGHT])(;W[aq];B[bs])(;W[ar];B[fs]))(;B[bs]C[CHOICE](;W[ap]C[RIGHT])(;W[fs];B[dq];W[ap]C[RIGHT])(;W[dq];B[fs])))(;W[ap];B[cp])(;W[bs];B[cp])(;W[aq];B[cp])(;W[ar];B[cp])(;W[as];B[cp])(;W[fs];B[cp]))