(;AB[rc]AB[qd]AB[pd]AB[od]AB[oc]AB[ob]AB[pb]AB[nb]AW[ma]AW[mb]AW[nc]AW[nd]AW[rd]AW[re]AW[qe]AW[pe]AW[oe]AW[ne]AW[rb]C[Black to Live. (without Ko)]AP[goproblems]
(;B[qc];W[sc]
(;B[qa]
(;W[qb]
(;B[pa];W[na];B[sb];W[sa];B[ra]C[RIGHT])
(;B[na];W[pa];B[oa];W[sb])
(;B[sb];W[sa]
(;B[pa];W[na];B[ra]C[RIGHT])
(;B[na];W[pa])))
(;W[na]
(;B[oa];W[qb])
(;B[qb];W[oa]
(;B[ra];W[sb])
(;B[sb];W[sa];B[ra]C[RIGHT]))))
(;B[qb];W[qa]
(;B[na];W[pa])
(;B[pa];W[na]
(;B[ra];W[sb])
(;B[sb];W[sa];B[ra]C[Fault. It's a Ko.]))
(;B[sa];W[sb]
(;B[na];W[pa])
(;B[pa];W[na];B[ra];W[sd])))
(;B[na];W[pa]
(;B[qa];W[qb];B[oa];W[sb])
(;B[qb];W[qa]))
(;B[ra];W[sb]
(;B[qa];W[qb];B[pa];W[na])
(;B[qb];W[na];B[oa];W[qa])
(;B[na];W[pa]
(;B[qa];W[qb])
(;B[qb];W[qa])))
(;B[sb];W[sa]
(;B[qa];W[na]
(;B[qb];W[oa];B[ra]C[RIGHT])
(;B[oa];W[qb])
(;B[ra]C[RIGHT];W[oa];B[qb]C[RIGHT]))
(;B[na];W[pa];B[qa];W[qb])
(;B[qb];W[qa]
(;B[pa];W[na];B[ra]C[Fault. It's a Ko.])
(;B[na];W[pa])))
(;B[sa];W[sb]
(;B[qa];W[na];B[oa];W[qb])
(;B[na];W[pa]
(;B[qa];W[qb])
(;B[qb];W[qa]))
(;B[qb];W[qa]
(;B[na];W[pa])
(;B[pa];W[na];B[ra];W[sd]))))
(;B[sc];W[qc]
(;B[qb];W[sb]
(;B[pc];W[sd];B[qc];W[na]
(;B[ra];W[oa])
(;B[oa];W[qa])
(;B[sa];W[oa];B[ra];W[pa]))
(;B[ra];W[sd]))
(;B[na];W[qb]))
(;B[sb];W[qc])
(;B[qb];W[sc]
(;B[ra];W[qc])
(;B[na];W[qc])
(;B[qc];W[qa]
(;B[na];W[pa])
(;B[pa];W[na]
(;B[ra];W[sb])
(;B[sb];W[sa];B[ra]C[Fault. It's a Ko.]))
(;B[sa];W[sb]
(;B[na];W[pa])
(;B[pa];W[na];B[ra];W[sd]))))
(;B[na];W[qc]
(;B[qb];W[sc])
(;B[sc];W[qb]))
(;B[ra];W[qc]
(;B[qb];W[sc])
(;B[sc];W[sb])))
