(;AB[sb]AB[sc]AB[sd]AB[qa]AB[pb]AB[qc]AW[na]AW[nb]AW[ob]AW[oc]AW[pc]AW[pd]AW[qd]AW[rd]AW[rc]AW[rb]AB[re]AB[qe]AB[pe]AB[oe]AB[od]AB[nc]AB[mc]AB[mb]AB[ma]C[Black to kill !!!]AP[goproblems]
(;B[pa];W[qb];B[ra]C[Good Job !!!RIGHT])
(;B[qb];W[pa];B[oa]C[Ko is not the solution !!!])
(;B[oa];W[qb]C[White is alife !!!])
(;B[ra];W[pa];B[oa]C[Ko is not the solution you can do better !!!])
(;B[sa];W[ra]C[Sorry :-(]))