(;AW[ar]AW[cr]AW[cq]AW[cp]AW[co]AW[dr]AW[er]AW[fr]AW[fs]AB[gs]AB[gr]AB[gq]AB[fq]AB[eq]AB[dq]AB[dp]AB[do]AB[dn]AB[cn]AB[bn]AB[bo]AW[bs]C[Black can't kill White but has the best result. FORCE]AP[goproblems] (;B[ao]C[FORCE];W[bp]C[FORCE];B[ap]C[FORCE];W[aq]) (;B[ap]C[FORCE];W[bp]C[FORCE];B[aq]C[FORCE];W[bq]C[FORCE];B[ao]) (;B[bp]C[FORCE];W[bq]C[FORCE] (;B[ap]C[RIGHT]) (;B[aq]C[FORCE];W[ap]C[FORCE];B[ao]C[FORCE];W[aq])) (;B[aq]C[FORCE] (;W[bp]C[FORCE];B[ap]C[FORCE];W[bq]C[FORCE];B[ao]) (;W[bq]C[FORCE];B[ap]C[FORCE];W[bp]C[FORCE];B[ao])) (;B[bq]C[FORCE];W[bp]C[FORCE];B[ap]C[FORCE];W[aq]C[FORCE];B[ao]) (;B[br]C[FORCE];W[bp]C[FORCE];B[ap]C[FORCE];W[aq]C[FORCE];B[ao]))