(;AB[rb]AB[qb]AB[pb]AB[pa]AB[qc]AB[sc]AB[pd]AB[od]AB[nd]AB[mc]AW[oa]AW[ob]AW[oc]AW[pc]AW[rc]AW[rd]AW[qd]AW[sb]AW[qf]TR[pc]TR[oc]TR[ob]TR[oa]MA[rb]MA[qb]MA[qc]MA[pb]MA[pa]C[Black to kill and survive]AP[goproblems]
(;B[ra];W[sd]
(;B[nc];W[sc]
(;B[nb]C[Solved!RIGHT])
(;B[na]C[Solved!RIGHT]))
(;B[nb];W[sc]
(;B[na]C[Solved!RIGHT])
(;B[nc]C[Solved!RIGHT]))
(;B[na];W[sc]
(;B[nb]C[Solved!RIGHT])
(;B[nc]C[Solved!RIGHT])))
(;B[qa];W[ra])
(;B[sd];W[se]
(;B[sa];W[ra])
(;B[ra];W[sc]
(;B[nc];W[sa])
(;B[nb];W[sa])
(;B[na];W[sa]))
(;B[qa];W[ra]))
(;B[nb];W[ra]
(;B[sa]C[Just ko. (c)BartTM])
(;B[nc];W[qa])
(;B[na];W[qa]))
(;B[na];W[ra]
(;B[sa]C[Just ko. (c)BartTM])
(;B[nb];W[qa])
(;B[nc];W[qa]))
(;B[nc];W[ra]
(;B[sa]C[Just ko. (c)BartTM])
(;B[nb];W[qa])
(;B[na];W[qa]))
(;B[sa];W[ra]
(;B[nc];W[sb]
(;B[nb];W[qa])
(;B[na];W[qa]))
(;B[nb];W[sb]
(;B[na];W[qa])
(;B[nc];W[qa]))
(;B[na];W[sb]
(;B[nb];W[qa])
(;B[nc];W[qa]))
(;B[sb];W[sd])
(;B[qa];W[sd]
(;B[nc];W[sb])
(;B[nb];W[sb])
(;B[na];W[sb]))))