(;AW[ra]AW[sa]AW[rc]AW[sc]AW[pb]AW[na]AW[nb]AW[nc]AB[ma]AB[mb]AB[mc]AB[nd]AB[pd]AB[od]AB[qd]AB[rd]AB[sd]AB[ld]AW[kd]AW[ke]AW[le]AW[kb]AW[ne]AW[oe]AW[pe]AW[rf]AW[qg]AP[goproblems]
(;B[ob];W[rb]
(;B[pa];W[qa]
(;B[oc];W[qc];B[oa]
(;W[pc];B[nb]C[Both live :)RIGHT])
(;W[nb];B[pc]C[White cannot expect to win this ko...RIGHT]))
(;B[qc];W[oc]))
(;B[pc];W[pa];B[oc];W[qb];B[oa];W[nb]))
(;B[pa];W[ob];B[qb];W[qc];B[pc];W[qa];B[rb];W[sb];B[qb];W[oa];B[oc];W[rb])
(;B[qb];W[qc];B[ob];W[rb]
(;B[pa];W[qa];B[oc];W[oa];B[pa];W[oa])
(;B[pc];W[qa];B[oa];W[pa];B[oc];W[nb])))