(;AB[bs]AB[bp]AB[bo]AB[co]AB[do]AB[dp]AB[eo]AB[fp]AB[gp]AB[gq]AB[gr]AB[jq]AW[cs]AW[cr]AW[cq]AW[cp]AW[bq]AW[dq]AW[ep]AW[fq]AW[fr]AP[goproblems]
(;B[aq];W[ar];B[er];W[eq];B[fs]LB[es:A]C[White cannot play at ARIGHT])
(;B[er];W[eq]
(;B[fs];W[es];B[ds];W[dr])
(;B[aq]
(;W[es]C[CHOICE])
(;W[ar]C[Mistake for White];B[fs]))))