(;AB[sb]AB[qb]AB[pc]AB[oc]AB[qd]AB[rd]AB[sd]AB[re]AW[qe]AW[rf]AW[se]AW[pd]AW[od]AW[nd]AW[nc]AW[ob]AW[pb]C[White to kill.]AW[qg]AP[goproblems]
(;W[ra];B[qa]
(;W[rc]
(;B[qc];W[rb]C[RIGHT])
(;B[rb];W[qc]C[RIGHT]))
(;W[qc];B[rc])
(;W[rb];B[rc]))
(;W[rc];B[qc]
(;W[ra]
(;B[qa];W[rb]C[RIGHT])
(;B[pa]C[CHOICE]
(;W[nb]
(;B[qa];W[rb]C[RIGHT])
(;B[rb];W[qa];B[sa];W[qa]C[RIGHT]))
(;W[na];B[qa];W[rb]C[RIGHT])
(;W[mb];B[qa];W[rb]C[RIGHT])
(;W[oa];B[nb];W[qa];B[na];W[pa];B[rb])
(;W[qa];B[nb];W[oa];B[na];W[pa];B[rb])
(;W[rb];B[nb])))
(;W[rb];B[ra])
(;W[qa];B[ra]))
(;W[qc];B[rc]
(;W[qa];B[ra];W[rb]C[Ko])
(;W[ra];B[qa]))
(;W[qa];B[ra]
(;W[qc];B[rc];W[rb]C[Ko.])
(;W[rc];B[qc])
(;W[pa];B[qc]))
(;W[rb];B[rc]
(;W[ra];B[qa])
(;W[qa];B[ra];W[qc];B[pc])
(;W[qc];B[pc]
(;W[qa];B[ra])
(;W[ra];B[qa])))
(;W[pa];B[qa]
(;W[rc];B[qc]
(;W[rb];B[ra])
(;W[ra];B[rb]))
(;W[qc];B[rc])))