(;AB[ra]AB[rb]AB[qd]AB[qe]AB[pe]AB[od]AB[of]AB[nf]AB[mf]AB[le]AB[ld]AB[lc]AB[mb]AB[na]AW[pa]AW[qa]AW[qb]AB[qc]AW[pc]AW[pd]AW[oc]AW[ob]AW[nb]AW[oe]AW[ne]AW[md]C[Black to kill]AP[goproblems]
(;B[ma]
(;W[oa]C[CHOICE]
(;B[nc]
(;W[nd]C[CHOICE]
(;B[mc]C[Very good, white is deadRIGHT])
(;B[me];W[mc]))
(;W[mc]C[Only for navigation: white cannot play here, because next black at q18FORCE];B[pb]C[and white is horribly dead in DOH-ness ;)]))
(;B[mc];W[nc];B[me];W[nd])
(;B[nd];W[nc]C[]
(;B[me];W[mc])
(;B[mc];W[me])
(;B[nd]
(;W[me];B[mc];W[od])
(;W[mc];B[me];W[od])))
(;B[me];W[nd]
(;B[mc];W[nc])
(;B[nc];W[mc])))
(;W[mc]C[CHOICE]
(;B[nd];W[nc]
(;B[oa]C[Very good, white is deadRIGHT])
(;B[lb];W[oa])
(;B[me];W[oa])
(;B[nd];W[oa];B[me];W[od])
(;B[od];W[oa])
(;B[la];W[oa])
(;B[kb];W[oa]))
(;B[oa];W[nd])
(;B[me];W[nd])))
(;B[oa];W[ma])
(;B[mc];W[nc]
(;B[me];W[nd]
(;B[ma];W[oa])
(;B[oa];W[ma]))
(;B[ma];W[oa];B[me];W[nd])
(;B[oa];W[ma]))
(;B[nd];W[nc]
(;B[me];W[mc];B[ma];W[oa])
(;B[ma];W[oa]
(;B[nd];W[me];B[mc];W[od])
(;B[mc];W[me])
(;B[me];W[mc]))
(;B[mc];W[me]
(;B[ma];W[oa])
(;B[oa];W[ma])
(;B[nd];W[od]
(;B[ma];W[oa])
(;B[oa];W[ma]))
(;B[od];W[nd]))
(;B[nd];W[me]
(;B[mc];W[od]
(;B[ma];W[oa])
(;B[oa];W[ma]))
(;B[ma];W[oa];B[mc];W[od]))
(;B[oa];W[ma]))
(;B[nc];W[mc];B[me];W[nd])
(;B[me];W[nd]
(;B[nc];W[mc])
(;B[mc];W[nc]
(;B[ma];W[oa])
(;B[oa];W[ma]))
(;B[ma];W[oa]
(;B[mc];W[nc])
(;B[nc];W[mc]))
(;B[oa];W[ma]))
(;B[lb];W[mc]
(;B[me];W[nd])
(;B[nd];W[nc];B[ma];W[oa])
(;B[ma];W[oa]
(;B[me];W[nd])
(;B[nd];W[nc]))))