(;AW[rc]AW[rd]AW[re]AW[se]AW[pc]AW[oc]AW[ob]AW[oa]AB[sf]AB[rf]AB[qf]AB[qe]AB[qd]AB[pd]AB[od]AB[nd]AB[nc]AB[nb]AB[na]AB[qa]C[B to kill]AP[goproblems]
(;B[qc];W[rb]
(;B[ra]C[Good workRIGHT];W[qb];B[pb];W[pa];B[pb]C[RIGHT])
(;B[qb];W[ra]C[You only killed half of W.]))
(;B[rb];W[qc];B[sc];W[qb];B[pa];W[ra];B[sa]C[only seki. B can do better.])
(;B[sc];W[qc];B[rb];W[qb];B[pa];W[ra];B[sa]C[only seki. B can do better.])
(;B[pb];W[qc];B[rb];W[sc];B[qb];W[sb]C[W livesCHOICE]))