(;AW[br]AW[cq]AW[dq]AW[dr]AW[er]AW[fr]AW[gr]AB[ar]AB[bq]AB[bp]AB[cp]AB[dp]AB[eq]AB[fq]AB[gq]AB[hq]AB[hr]AB[hs]AW[gs]C[Black can't kill White but has the best result.FORCE]AP[goproblems]
(;B[as]C[FORCE];W[bs]C[FORCE];B[aq]C[])
(;B[bs]C[FORCE];W[cs]C[FORCE];B[cr]C[RIGHT])
(;B[cs]C[FORCE];W[bs])
(;B[cr]C[FORCE];W[bs])
(;B[ds]C[FORCE];W[bs]))