(;AB[rb]AB[qc]AB[qd]AB[qf]AB[pe]AB[oe]AB[nd]AB[md]AB[lc]AB[kc]AB[jc]AB[jb]AW[od]AW[pd]AW[pc]AW[pb]AW[nc]AW[mc]AW[lb]AW[kb]AB[oc]AP[goproblems]
(;B[la]
(;W[ma]C[CHOICE];B[na]
(;W[nb]C[CHOICE];B[mb]C[RIGHT])
(;W[mb];B[ob];W[pa];B[qa]C[RIGHT]))
(;W[mb];B[ob];W[oa];B[ka]C[RIGHT])
(;W[ka];B[mb]C[RIGHT]))
(;B[ka];W[ma]
(;B[la];W[ja])
(;B[mb];W[nb];B[qa];W[pa])
(;B[na];W[ob];B[mb];W[nb]))
(;B[ob];W[nb];B[ma];W[na];B[ka];W[mb])
(;B[nb];W[mb]
(;B[ob]
(;W[oa])
(;W[na];B[pa];W[oa]))
(;B[ka];W[ob];B[la];W[na]))
(;B[mb];W[nb])
(;B[ma];W[mb])
(;B[na];W[ob]))