(;AP[goproblems]AW[bs]AW[br]AW[bq]AW[cp]AW[co]AW[dn]AW[en]AW[fn]AW[cm]AW[go]AW[ho]AW[hp]AW[hq]AW[hr]AB[dp]AB[do]AB[eo]AB[fo]AB[gp]AB[gq]AB[gr]AB[fq]AB[eq]AB[cr]AB[cq]AW[dq]TR[cr]TR[cq](;W[er];B[dr](;W[ds]C[RIGHT])(;W[es];B[ds](;W[cs];B[dq](;W[gs];B[fs])(;W[fs];B[gs]))(;W[gs];B[fs])(;W[fs];B[gs]))(;W[cs];B[es])(;W[gs];B[es]))(;W[dr];B[er];W[cs];B[es])(;W[ds];B[dr]C[Mistake by black reverts to solution](;W[er]C[RIGHT])(;W[cs];B[es])(;W[es];B[er])(;W[fs];B[er]))(;W[cs];B[dr](;W[ds];B[es])(;W[es];B[er])(;W[er];B[es]))(;W[es];B[dr](;W[cs];B[er])(;W[ds];B[er])(;W[er];B[ds](;W[cs];B[dq](;W[gs];B[fs])(;W[fs];B[gs]))(;W[gs];B[fs])(;W[fs];B[gs]))))