(;AB[rc]AB[qc]AB[pc]AB[pb]AB[nb]AB[mb]AB[nd]AB[md]AB[nf]AB[pf]AB[qg]AB[rg]AW[rf]AW[se]AW[qe]AW[rd]AW[qd]AW[pd]AW[od]AW[oc]AW[ob]AW[sc]AP[goproblems]
(;B[ra]
(;W[rb];B[qb];W[sb];B[oa]C[RIGHT])
(;W[oa];B[sb]C[RIGHT]))
(;B[rb];W[oa];B[sb];W[qa])
(;B[oa];W[rb];B[sb];W[qa])
(;B[sb];W[rb]))