How does Black play so as to capture nine white stones?
(;AB[pd]AB[od]AW[oc]AW[nc]AW[nd]AW[md]AW[me]AW[le]AB[ne]AB[mf]AB[lg]AB[kh]AW[lf]AW[kf]AW[kg]AB[jg]AB[jf]AB[ke]AB[ld]AB[lc]AB[mc]AB[nb]AW[mb]AW[lb]AP[goproblems]
(;B[ob];W[pc];B[qc]C[If Black plays 1 and 3, the ten white stones can't avoid capture.RIGHT]LB[ob:1]LB[pc:2]LB[qc:3])
(;B[pc];W[ob]C[Playing at 1 here allows White to catch a black stone with 2 and thereby escape.]LB[pc:1]LB[ob:2]))