(;AB[bq]AB[cr]AB[er]AB[fr]AW[fs]AW[gr]AW[gq]AW[ep]AW[cp]AW[bp]AW[bn]AW[ir]AW[fp]C[Black to live]AP[goproblems]
(;B[bs]
(;W[ar]C[CHOICE]
(;B[aq];W[ds]
(;B[es]C[RIGHT];W[dr];B[dq];W[eq]
(;B[gs];W[cq])
(;B[cs]C[RIGHT])
(;B[cq];W[fq]))
(;B[dr];W[es]))
(;B[ds];W[aq])
(;B[dq];W[aq]))
(;W[ds]
(;B[ar]C[RIGHT])
(;B[es];W[ar];B[aq];W[dr];B[dq]C[RIGHT];W[eq]
(;B[gs];W[cq])
(;B[cs]C[RIGHT])
(;B[cq];W[fq]))))
(;B[ar];W[bs]
(;B[cs];W[dq])
(;B[es];W[dq];B[dr];W[cs])
(;B[dq];W[es];B[ds];W[gs]))
(;B[ds];W[aq]
(;B[bs];W[ar])
(;B[ar];W[bs];B[dq];W[cq]
(;B[br];W[eq])
(;B[ap];W[eq])
(;B[eq];W[br]))
(;B[dq];W[ar]))
(;B[cs];W[ar]
(;B[es];W[aq])
(;B[dq];W[aq])
(;B[aq];W[dq]))
(;B[aq];W[bs]
(;B[es];W[dq])
(;B[cs];W[dq])
(;B[dq];W[es];B[ds];W[gs]))
(;B[dq];W[aq]
(;B[ar];W[bs]
(;B[ds];W[cq]
(;B[br];W[eq])
(;B[ap];W[eq])
(;B[eq];W[br]))
(;B[cs];W[es])
(;B[es];W[cq]
(;B[br];W[eq])
(;B[ap];W[eq]))
(;B[cq];W[es]
(;B[ds];W[gs]
(;B[br];W[eq])
(;B[eq];W[cs]C[You could avoid Ko.]))
(;B[cs];W[ds]))
(;B[br];W[es]
(;B[ds];W[gs])
(;B[cs];W[ds])))
(;B[ds];W[ar])
(;B[bs];W[ar])
(;B[cs];W[ar])
(;B[es];W[ar]))
(;B[br];W[aq]
(;B[ds];W[ar])
(;B[dq];W[ar])
(;B[ar];W[dq]))
(;B[dr];W[aq];B[ar];W[bs])
(;B[es];W[aq]
(;B[bs];W[ar])
(;B[ar];W[bs]
(;B[ap];W[dq])
(;B[br];W[dq]))
(;B[dq];W[ar])
(;B[cs];W[ar])))