(;AB[br]AB[aq]AB[ap]AB[bp]AB[cp]AW[dp]AB[cn]AW[ep]AW[eq]AW[fq]AW[gq]AW[gr]AB[fr]AB[er]AB[dr]AB[dq]AW[cq]AW[cr]AW[cs]AW[ar]AW[bq]C[Black to take the corner.]AP[goproblems]
(;B[bs];W[as]
(;B[bs];W[fs]
(;B[br]
(;W[ar]
(;B[ds]C[RIGHT])
(;B[as];W[ar]))
(;W[ds];B[es]C[RIGHT]))
(;B[ds];W[es]))
(;B[br];W[fs];B[bs]
(;W[ds];B[es]C[RIGHT])
(;W[ar]C[CHOICE]
(;B[as];W[ar])
(;B[ds]C[RIGHT])))
(;B[ds];W[fs]
(;B[bs];W[es])
(;B[br];W[es]))
(;B[fs];W[gs];B[br];W[ds];B[bs];W[es]))
(;B[ds];W[bs]C[White has two eyes.])
(;B[fs];W[gs]
(;B[bs];W[as];B[br];W[ds];B[bs];W[es])
(;B[as];W[ds])
(;B[ds];W[es]))
(;B[as];W[fs]
(;B[ds];W[es])
(;B[bs];W[ar])
(;B[ar];W[ds];B[bs];W[es])))