(;AB[ar]AB[aq]AB[bp]AB[co]AB[dn]AB[en]AB[fn]AW[fo]AW[eo]AW[do]AW[cp]AW[bq]AW[br]AW[cs]AW[ds]AW[es]AW[fr]AW[fq]AW[eq]AW[fp]AB[dr]AB[gn]AB[go]AB[gp]AB[gq]AB[gr]AB[gs]AB[fs]AW[cq]AW[bs]AW[as]AB[cn]C[Black can't kill White but has the best result.FORCE]AB[cm]AB[bm]AB[am]AP[goproblems]
(;B[ao]C[FORCE];W[ap]C[FORCE]
(;B[bo]C[FORCE];W[aq]C[])
(;B[aq]C[FORCE];W[ar]C[FORCE];B[ap]C[RIGHT])
(;B[ar]C[FORCE];W[aq]))
(;B[bo]C[FORCE];W[ap]C[FORCE];B[ao]C[FORCE];W[aq]C[])
(;B[ap]C[FORCE];W[bo]))