(;AB[rb]AB[pb]AB[sc]AB[sd]AB[se]AB[rf]AB[qf]AB[pf]AB[of]AB[nf]AB[ne]AB[md]AB[mc]AB[mb]AB[ma]AW[nb]AW[nc]AW[nd]AW[oe]AW[pe]AW[qe]AW[qc]AW[pc]AW[qb]AP[goproblems]
(;B[ob];W[na]
(;B[oc];W[od];B[qd]
(;W[rd]
(;B[rc];W[re];B[qa];W[pd];B[pa]C[RIGHT])
(;B[re];W[rc];B[qa];W[pd];B[pa]C[RIGHT]))
(;W[pa];B[rd]C[RIGHT]))
(;B[qd];W[oc];B[pd];W[rd];B[rc];W[od]))
(;B[qa];W[ob];B[pa];W[rd])
(;B[na];W[ob]))