(;AB[cr]AB[bq]AB[bp]AB[cp]AB[dp]AB[ep]AB[fp]AB[gq]AB[gr]AW[cq]AW[dq]AW[eq]AW[fq]AW[er]AW[gp]AW[hq]AW[ir]AW[ip]AW[go]AW[en]AW[dn]AW[cn]AW[br]C[Black to live]AW[bo]AP[goproblems]
(;B[bs];W[ar]C[CHOICE]
(;B[es]
(;W[fs]C[CHOICE];B[ds]C[];W[hr]C[]
(;B[aq];W[gs];B[as];W[fr]C[];B[dr]C[RIGHT])
(;B[gs];W[hs])
(;B[fr];W[gs]))
(;W[ds];B[fs];W[hr];B[cs]C[RIGHT])
(;W[dr];B[cs];W[fs];B[fr]C[RIGHT]))
(;B[ds];W[dr]
(;B[es];W[cs]C[];B[fs];W[hr]C[ko])
(;B[aq];W[cs]C[ko])
(;B[fr];W[cs]))
(;B[fr];W[ds]
(;B[cs];W[hr])
(;B[fs];W[hr]
(;B[aq];W[es])
(;B[cs];W[hs])))
(;B[aq];W[ds]
(;B[as];W[fr])
(;B[fs];W[fr]
(;B[as];W[hr])
(;B[gs];W[hs]))
(;B[fr];W[hr])))
(;B[fs];W[cs]
(;B[ds];W[dr]
(;B[es];W[ar])
(;B[ar]
(;W[bs];B[es];W[hr];B[aq];W[hs];B[as];W[gs];B[cr];W[fr])
(;W[es];B[bs];W[as])))
(;B[ar];W[bs]
(;B[es];W[ds])
(;B[ds];W[dr])))
(;B[cs];W[bs])
(;B[es];W[cs]
(;B[ds];W[dr];B[fs])
(;B[fs];W[ds]
(;B[ar];W[bs])
(;B[fr];W[dr]))
(;B[fr])
(;B[ar];W[bs]
(;B[ds];W[dr];B[fs])
(;B[fr];W[dr];B[fs];W[hr])
(;B[fs])))
(;B[ds];W[dr]
(;B[es];W[cs])
(;B[fs];W[cs])
(;B[cs];W[bs])
(;B[ar];W[cs]C[ko at most];B[fs]))
(;B[fr];W[cs]
(;B[es];W[dr]
(;B[fs];W[ds];B[ar];W[bs])
(;B[ar];W[bs]))
(;B[ar];W[bs]
(;B[es];W[dr])
(;B[ds];W[dr]))
(;B[ds];W[dr]))
(;B[ar];W[bs]
(;B[ds];W[dr];B[es];W[cs])
(;B[cs];W[ap]
(;B[fr];W[fs]
(;B[as];W[gs])
(;B[gs];W[es]))
(;B[es];W[ds]
(;B[as];W[fs])
(;B[fs];W[dr])
(;B[dr];W[ds]))
(;B[fs];W[es];B[as];W[fr]C[thanks to Takamoyo and tails])
(;B[as];W[fr]))
(;B[ap];W[ds])))