(;AB[br]AB[bq]AB[bp]AB[co]AB[do]AB[fo]AB[gn]AB[gp]AB[gq]AB[hr]AB[iq]AB[cs]AW[cr]AW[cq]AW[cp]AW[dp]AW[fp]AW[fq]AW[gr]AW[gs]AW[dr]C[Black to kill]AW[em]AW[cm]AB[bn]AB[cn]AP[goproblems]
(;B[es];W[ds]
(;B[fr]
(;W[er]C[CHOICE]
(;B[ep]C[]
(;W[fs]C[CHOICE];B[eq]C[CHOICERIGHT])
(;W[eq];B[dq]C[RIGHT]))
(;B[eq];W[ep])
(;B[hs];W[fs]))
(;W[eo];B[en]
(;W[ep];B[hs]C[RIGHT])
(;W[er];B[ep]C[RIGHT])
(;W[eq];B[hs]C[RIGHT]))
(;W[eq];B[hs]C[RIGHT]))
(;B[hs];W[er])
(;B[er];W[eq])
(;B[eq];W[ep]
(;B[er];W[fr]C[seki])
(;B[hs];W[er])
(;B[fr];W[er]))
(;B[ep];W[eq]
(;B[fr];W[eo])
(;B[eo];W[er])
(;B[er];W[eo])))
(;B[ep];W[eq])
(;B[eq];W[ep]
(;B[ds];W[es]
(;B[er];W[fr])
(;B[bs];W[er])
(;B[hs];W[er]))
(;B[er];W[fr]
(;B[ds];W[es];B[fs];W[dq])
(;B[es];W[ds]C[seki]))
(;B[hs];W[er])
(;B[es];W[ds]))
(;B[ds];W[es]
(;B[er];W[eq]
(;B[fs];W[fr])
(;B[bs];W[fr]))
(;B[ep];W[eq])
(;B[eq];W[ep])
(;B[bs];W[fr]))
(;B[er];W[eq];B[ds];W[es])
(;B[hs];W[er])
(;B[fr];W[er])
(;B[fs];W[er]))