(;AB[pa]AB[oa]AB[na]AB[nb]AB[nc]AB[nd]AB[od]AB[pb]AB[qc]AB[pf]AB[qf]AB[nf]AB[re]AB[se]AB[rg]AW[qb]AW[rb]AW[ob]AW[oc]AW[pc]AW[pd]AW[pe]AW[qe]AW[rd]AW[sd]C[10. White dies ]AP[goproblems]
(;B[rc];W[sc];B[ra]LB[rc:1]LB[sc:2]LB[ra:3]C[Black 1 forces White 2, and Black 3 finishes the job. A simple combination, but easy to overlook.
RIGHT])
(;B[ra];W[rc]LB[ra:1]LB[rc:2]LB[qa:a]C[If Black starts with 1, White lives with 2. Note that 2 must not be played at 'a' (or Black will play 2). CHOICE]))