(;AB[pb]AB[qb]AB[rb]AB[sb]AB[sc]AB[qc]AB[oa]AB[oc]AB[od]AB[oe]AB[lb]AB[lc]AB[md]AW[pa]AW[rc]AW[rd]AW[sd]AW[qd]AW[pd]AW[pc]AW[nb]AW[ob]AW[mb]AW[nc]AW[pf]AW[qf]TR[nc]TR[nb]TR[ob]TR[mb]C[Black to kill and survive]AP[goproblems]
(;B[ra];W[na]
(;B[nd];W[oa];B[mc]C[Correct!RIGHT])
(;B[mc];W[nd]
(;B[ne]C[Correct!RIGHT])
(;B[me];W[ne]
(;B[nf];W[of])
(;B[of];W[nf]
(;B[ng];W[og])
(;B[mf];W[og])))))
(;B[nd];W[ra])
(;B[mc];W[ra])
(;B[ma];W[ra])
(;B[na];W[ma]
(;B[oa];W[na]
(;B[ra];W[oa])
(;B[la];W[qa])
(;B[mc];W[qa])
(;B[nd];W[qa])
(;B[qa];W[oa]))
(;B[qa];W[oa])
(;B[ra];W[oa]))
(;B[sa];W[ra];B[qa];W[na])
(;B[qa];W[ra]))