(;AB[ra]AB[rb]AB[rc]AB[qd]AB[qe]AB[od]AB[nc]AB[nb]AW[na]AW[mb]AW[ob]AW[qc]AW[qb]AW[lc]AW[jc]AW[rd]AW[re]AW[qf]C[Black to save the stones in corner.]AP[goproblems]
(;B[pb]
(;W[pc]
(;B[oc];W[pa]
(;B[qa];W[ma];B[pd]C[RIGHT])
(;B[pd];W[qa]))
(;B[qa];W[oc])
(;B[pa];W[oc])
(;B[oa];W[pa]))
(;W[pa];B[pc];W[qa];B[oa]C[RIGHT]))
(;B[qa];W[pb];B[oa];W[pa])
(;B[oc];W[pb];B[oa];W[pa];B[qa];W[oa])
(;B[oa];W[pa])
(;B[pa];W[pb]))