(;AB[cq]AB[co]AB[bo]AB[ao]AB[do]AB[dp]AB[eo]AB[fo]AB[fp]AB[gq]AB[fr]AB[hp]AW[cr]AW[dq]AW[ep]AW[eq]AW[er]AW[cp]AW[bp]AP[goproblems]
(;B[br];W[bq];B[aq]C[RIGHT])
(;B[aq]
(;W[br]LB[bq:A]C[CHOICE])
(;W[bq]C[mistake by White reverts to solution];B[br]C[RIGHT]))
(;B[bq];W[br];B[ap];W[ar]))