(;AB[ds]AB[es]AB[er]AW[cs]AW[dr]AW[cq]AW[bq]AW[bp]AW[ap]AB[ao]AB[bo]AB[cp]AB[eq]AB[ep]AB[co]C[Black to kill]AP[goproblems]
(;B[ar];W[br]
(;B[dq];W[as]
(;B[cr]C[Correct. White needs to win both of the Ko's to live, which she can't.RIGHT])
(;B[bs]C[Correct. White needs to win both Ko's which she can'tRIGHT]))
(;B[bs];W[as]C[Ko !])
(;B[as];W[dq]))
(;B[br];W[ar]
(;B[bs];W[cr])
(;B[cr];W[bs])
(;B[as];W[bs])
(;B[dq];W[cr]))
(;B[bs];W[br]
(;B[cr]C[Ko !])
(;B[ar];W[as]C[Ko !])
(;B[dq];W[as];B[cr]C[Ko !])
(;B[as];W[ar]))
(;B[cr];W[br])
(;B[dq];W[ar]
(;B[cr];W[bs]C[White lives])
(;B[bs];W[cr])
(;B[br];W[cr])))