(;AW[qc]AW[qd]AB[pc]AB[pd]AW[qb]AB[ob]AB[mb]AB[mc]AB[nd]AB[ne]AB[oe]AB[pe]AW[qe]AW[pf]AW[of]AW[nf]AW[mf]AW[me]AW[md]AW[lc]AW[lb]AW[jc]AW[oc]AB[ma]LB[oc:1]LB[ma:2]C[white plays 1, black responds at 2. how many different first moves can now kill black without ko? click on the number.FORCE]LB[jh:0]LB[kh:1]LB[lh:2]LB[mh:3]LB[nh:4]LB[oh:5]AP[goproblems]
(;W[lh];B[lg]C[correct. A is one of the two ways to kill. now play the other.]LB[nc:A]
(;W[nc]C[NOTTHIS])
(;W[oa];B[pa]
(;W[pb];B[na]
(;W[nc]C[RIGHT])
(;W[nb];B[nc]))
(;W[nb];B[na]
(;W[nc];B[pb])
(;W[pb];B[nc])))
(;W[pb];B[nc]
(;W[oa];B[na]C[just ko.])
(;W[na];B[oa]))
(;W[pa];B[oa])
(;W[nb];B[nc]
(;W[oa];B[na])
(;W[pb];B[na]))
(;W[na];B[oa])
(;W[la];B[oa]))
(;W[jh]C[incorrect])
(;W[kh]C[incorrect])
(;W[mh]C[incorrect])
(;W[nh]C[incorrect])
(;W[oh]C[incorrect]))