(;AB[cr]AB[bq]AB[cp]AB[co]AB[bo]AW[bn]AW[cn]AW[dn]AW[bl]AW[fn]AW[dp]AW[dq]AW[cq]AW[fq]AP[goproblems]
(;W[ar];B[br];W[ao];B[ap];W[an];B[dr];W[er];B[ds];W[bs]C[RIGHT])
(;W[dr];B[br];W[ao];B[ap];W[an];B[ar])
(;W[ao]
(;B[ar]C[CHOICE];W[ap];B[bs]LB[br:A]LB[an:B])
(;B[ap]C[Mistake by Black that reverts to solution.];W[ar];B[br];W[an];B[dr];W[er];B[ds];W[bs]C[RIGHT])))