(;AB[ap]AB[bp]AB[cp]AB[an]AB[bn]AB[cn]AB[dn]AB[en]AB[eo]AB[ep]AB[eq]AB[fr]AB[fs]AW[ao]AW[bo]AW[do]AW[co]AW[dp]AW[dq]AW[cr]C[Black to kill. No ko.]AP[goproblems]
(;B[br];W[bq]
(;B[cs]
(;W[ar]
(;B[dr]C[];W[bs];B[cq]C[RIGHT])
(;B[bs];W[ds]))
(;W[ds]C[CHOICE]
(;B[bs];W[ar])
(;B[as];W[cq];B[dr];W[aq];B[es];W[ar])
(;B[dr]C[];W[er];B[aq];W[bs];B[cq];W[dr]
(;B[es]C[RIGHT])
(;B[ar]C[RIGHT]))
(;B[aq];W[ar];B[as];W[dr];B[cq];W[bs])))
(;B[aq];W[cq])
(;B[dr];W[cq];B[cs];W[aq]TR[bp]TR[bs]C[miai to live]
(;B[bp];W[bs];B[as];W[ar])
(;B[bs];W[bp])))
(;B[cq];W[dr];B[br];W[ar]
(;B[bs];W[bq])
(;B[bq];W[bs])
(;B[aq];W[bq])
(;B[cs];W[bq]))
(;B[dr];W[cq]
(;B[br];W[bq];B[cs];W[aq]TR[bp]TR[bs]C[miai to live]
(;B[bp];W[bs];B[as];W[ar])
(;B[bs];W[bp]))
(;B[bs];W[cs];B[ar];W[br];B[ds];W[as]C[A ko is not enough])
(;B[cs];W[bs];B[br];W[ds];B[bq];W[er];B[ar];W[es])))