(;AW[qa]AW[rb]AW[rc]AW[rd]AW[re]AW[pb]AW[qc]AB[qe]AB[qd]AB[pd]AB[pc]AB[ob]AB[nc]AB[nd]AB[mb]AB[ma]AW[lb]AW[mc]AW[md]AW[ld]AW[me]AW[ne]AW[mf]AW[mg]AB[nf]AB[oe]AB[of]AB[ng]AW[mh]AW[nh]AW[oh]AW[og]AW[ph]AW[qf]C[If you think black is unconditionally alive, play at T. If you think white can kill, then kill black.]LB[rh:T]AP[goproblems]
(;W[pf]
(;B[oa]
(;W[od]
(;B[oc]C[CHOICE];W[pe]C[RIGHT])
(;B[pe]C[CHOICE];W[oc]C[RIGHT]))
(;W[pe];B[od])
(;W[la];B[pe]))
(;B[pe];W[oa]C[RIGHT]))
(;W[oa];B[pf])
(;W[rh]C[Black can be killed.])
(;W[na];B[oa])
(;W[oc];B[oa])
(;W[od];B[pf]))