(;AW[rb]AW[rc]AW[rd]AW[pa]AW[ob]AW[oc]AW[od]AW[pd]AB[oa]AB[na]AB[nb]AB[nc]AB[nd]AB[ne]AB[pf]AB[qe]AB[re]AB[se]AB[sd]AP[goproblems];B[pb];W[qa];B[ra];W[qb]
(;B[qd];W[sc];B[qc];W[sa];B[pc]C[RIGHT])
(;B[sc];W[sb];B[qd];W[qc])
(;B[sb];W[qd];B[sc];W[pc]))