(;AP[goproblems]AB[cr]AB[er]AB[eq]AB[dp]AB[do]AB[co]AB[bo]AB[ap]AW[bp]AW[cp]AW[bs]AW[dq]AW[dr]AW[ds]TR[cr](;W[ar];B[bq];W[cq]C[RIGHT])(;W[bq];B[ar];W[aq];B[br]LB[cq:A]LB[cs:B]C[White cannot play at A or B](;W[cs];B[cq])(;W[cq];B[es]))(;W[cq](;B[ar]LB[aq:A]LB[br:B]LB[bq:C]C[CHOICE](;W[br];B[aq])(;W[cs];B[br];W[bq];B[aq]))(;B[aq]C[];W[ar];B[br];W[bq];B[as];W[cs];B[es])(;B[br];W[bq];B[aq];W[ar];B[as];W[cs];B[es]))(;W[aq];B[bq](;W[cq];B[ar])(;W[ar];B[cq])(;W[br];B[cq]))(;W[br];B[ar](;W[cq];B[aq])(;W[bq];B[aq])(;W[aq];B[bq];W[cq];B[aq])))