(;AP[goproblems]AW[dr]AW[fr]AW[er]AW[dq]AW[aq]AW[bp]AW[bo]AW[ao]AW[co]AW[do]AW[eo]AW[ep]AB[cq]AB[cp]AB[dp]AB[bq]AB[cr]AB[eq]AB[fq]AB[gq]AB[gr]C[Black to save his stones without ko.](;B[bs](;W[ar](;B[cs];W[ds](;B[fs]C[CHOICERIGHT])(;B[es]C[RIGHT]))(;B[fs];W[ds](;B[cs]C[RIGHT])(;B[gs];W[br]))(;B[ds]C[RIGHT])(;B[es];W[ds](;B[cs]C[RIGHT])(;B[fs];W[gs])(;B[gs];W[fs]))(;B[br]LB[ap:1]LB[fs:2]LB[as:3]))(;W[ds](;B[fs];W[ar]C[CHOICE](;B[cs]C[RIGHT])(;B[gs];W[br]))(;B[cs];W[ar](;B[fs]C[CHOICERIGHT])(;B[es]C[RIGHT]))(;B[es];W[ar](;B[cs]C[RIGHT])(;B[fs];W[gs])(;B[gs];W[fs]))(;B[gs];W[ar])))(;B[ar];W[cs];B[ap];W[bs])(;B[cs];W[bs](;B[ar];W[ds];B[ap])(;B[fs];W[br]))(;B[ds];W[br];B[cs];W[bs])(;B[fs];W[br])(;B[es];W[br])(;B[br];W[ar](;B[cs];W[ds])(;B[fs];W[cs])(;B[bs];W[ap](;B[fs];W[as])(;B[ds];W[as]))(;B[ds];W[bs]))(;B[gs];W[cs]))