(;AB[sd]AB[re]AB[sf]AB[qf]AB[pf]AB[pe]AB[pd]AB[od]AB[nd]AB[nc]AB[ob]AB[na]AB[pa]AW[qb]AW[pb]AW[pc]AW[oc]AW[qd]AW[qe]AW[rd]AW[rc]C[B to kill]AP[goproblems]
(;B[rb];W[sb];B[ra]C[great jobRIGHT])
(;B[sc];W[sb];B[ra];W[qa]C[failCHOICE])
(;B[qa];W[ra];B[sb];W[sc]C[failCHOICE])
(;B[ra];W[qa];B[rb];W[oa]C[B can do better than a KoCHOICE])
(;B[sb];W[sc];B[rb];W[se]C[B can do better than a Ko.CHOICE]))