(;SZ[19]AW[ob]AW[pb]AW[rb]AW[sb]AW[qc]AB[lb]AB[nb]AB[nc]AB[rc]AB[sc]AB[od]AB[pd]AB[rd]AB[qe]LB[og:4]LB[pg:3]LB[qg:2]LB[rg:1]LB[sg:0]LB[oh:9]LB[ph:8]LB[qh:7]LB[rh:6]LB[sh:5]C[how many ways to kill without ko?]GM[1]FF[4]CA[UTF-8]AP[CGoban:2]ST[2]RU[Japanese]KM[0.00]PW[White]PB[Black]
(;B[qg];W[qh]C[now, you can explore various paths aboveRIGHT]
(;B[qa];W[ra]
(;B[pa];W[oa])
(;B[pc];W[qb]))
(;B[oa];W[pa]
(;B[ra];W[qa];B[pc]C[RIGHT])
(;B[pc];W[ra];B[qb]C[RIGHT])
(;B[qa];W[ra]))
(;B[pa];W[qa]
(;B[oa];W[na];B[oa];W[pc])
(;B[pc];W[oa]))
(;B[ra];W[qa]
(;B[oa];W[pc])
(;B[pc];W[oa]))
(;B[na];W[ra]
(;B[qb];W[pc])
(;B[oa];W[pa])
(;B[pc];W[qb])
(;B[pa];W[oa]))
(;B[pc]
(;W[ra]
(;B[qb]C[RIGHT])
(;B[oa];W[pa];B[qb]C[RIGHT]))
(;W[qa];B[oa]C[RIGHT]))
(;B[oc];W[qa]
(;B[oa];W[pc])
(;B[pc];W[oa]))
(;B[qd];W[pc]
(;B[qa];W[ra])
(;B[oa];W[qa]))
(;B[sa];W[ra])
(;B[qb];W[qa]))
(;B[sg]C[wrong. after you select the correct number, you may explore possibilities])
(;B[rg]C[wrong. after you select the correct number, you may explore possibilities])
(;B[pg]C[wrong. after you select the correct number, you may explore possibilities])
(;B[og]C[wrong. after you select the correct number, you may explore possibilities])
(;B[sh]C[wrong. after you select the correct number, you may explore possibilities])
(;B[rh]C[wrong. after you select the correct number, you may explore possibilities])
(;B[qh]C[wrong. after you select the correct number, you may explore possibilities])
(;B[ph]C[wrong. after you select the correct number, you may explore possibilities])
(;B[oh]C[wrong. after you select the correct number, you may explore possibilities])
(;B[na]C[NOTTHIS])
(;B[oa]C[NOTTHIS])
(;B[pa]C[NOTTHIS])
(;B[qa]C[NOTTHIS])
(;B[ra]C[NOTTHIS])
(;B[sa]C[NOTTHIS])
(;B[qb]C[NOTTHIS])
(;B[oc]C[NOTTHIS])
(;B[pc]C[NOTTHIS])
(;B[qd]C[NOTTHIS]))
adum