(;AB[rc]AB[qd]AB[qe]AB[se]AB[re]AW[sd]AW[rd]AW[rb]AW[pc]AW[ob]AW[pe]AW[pf]AW[rf]AW[qf]C[3. Black to live]AP[goproblems]
(;B[qb];W[qc];B[sb]LB[qb:1]LB[qc:2]LB[sb:3]C[Black 1 is the only move with any chance of succeeding, and succeed it does, thanks to the snapback created by 3. RIGHT])
(;B[sb];W[qb]LB[sb:1]LB[qb:2]LB[qc:a]C[If Black hanes from the edge, White will reply at 2 (not 'a'!) and that will be that. CHOICE]))