(;AB[bo]AB[co]AB[do]AB[eo]AW[ap]AW[bp]AW[cp]AW[dp]AW[ep]AW[fp]AW[fq]AW[br]AW[bs]AW[cs]AB[fo]AB[gp]AB[gq]AB[go]AB[fr]AB[cr]AB[dr]AB[dq]AB[eq]AB[es]C[black to kill]AB[fs]AP[goproblems]
(;B[ar];W[cq]
(;B[ao];W[ds])
(;B[aq];W[ds])
(;B[ds];W[aq]))
(;B[ds];W[ar])
(;B[bq];W[cq]
(;B[ar];W[aq])
(;B[aq];W[ar])
(;B[ao];W[aq]))
(;B[ao]
(;W[ds]C[CHOICE]
(;B[bq];W[aq]
(;B[ar]C[RIGHT])
(;B[er];W[cq]))
(;B[ar];W[cq])
(;B[aq];W[ar])
(;B[cq];W[bq])
(;B[er];W[gr]
(;B[bq];W[gs])
(;B[ar];W[gs])
(;B[hr];W[cq])))
(;W[ar];B[bq]C[];W[aq];B[cq]C[RIGHT])
(;W[cq];B[aq];W[bq];B[ar]C[RIGHT]))
(;B[aq];W[ar])
(;B[cq];W[bq];B[ar];W[ds]))