(;AW[bq]AW[cq]AW[cr]AW[ap]AW[ao]AW[bo]AW[cp]AB[ar]AB[bn]AB[dp]AB[dq]AB[dr]AB[ds]AB[do]AB[an]AW[bs]AW[co]AB[cn]AB[dn]C[Black can't kill White but has the best result.FORCE]AP[goproblems]
(;B[aq]C[FORCE];W[cs])
(;B[br]C[FORCE];W[cs])
(;B[as]C[FORCE];W[cs])
(;B[cs]C[FORCE];W[br]C[RIGHT]))