(;AB[ao]AB[bo]AB[ap]AB[aq]AB[bq]AB[cq]AB[dr]AB[er]AB[fr]AB[bs]AW[an]AW[bn]AW[cn]AW[co]AW[cp]AW[bp]AW[dq]AW[eq]AW[fq]AW[gr]AW[gq]AW[dp]AW[gs]AW[fs]C[Black plays tenuki after White F1. How should White play to kill Black?]AP[goproblems]
(;W[cr]
(;B[br]C[CHOICE]
(;W[ds];B[cs];W[es]C[RIGHT])
(;W[es];B[cs];W[ds]C[RIGHT]))
(;B[cs]C[CHOICE];W[ds];B[br];W[es]C[RIGHT]))
(;W[ds];B[cr]
(;W[ar];B[es])
(;W[es];B[ar]))
(;W[es];B[ds]
(;W[cr];B[cs])
(;W[cs];B[cr])))