(;AB[as]AB[br]AB[cq]AB[dp]AW[ar]AW[bq]AW[cp]AW[do]AB[eo]AW[bp]AW[aq]AW[co]AW[dn]AW[cn]AW[bn]AW[an]AB[en]AB[em]AB[cm]AB[dm]AB[bm]AB[am]AB[ep]AW[ao]AB[fp]AB[fq]AB[fr]AB[fs]C[Black can't kill White but has the best result.FORCE]AP[goproblems]
(;B[bs]C[FORCE];W[dq])
(;B[cr]C[FORCE];W[bs]C[FORCE]
(;B[cs]C[FORCE];W[as]C[RIGHT])
(;B[ds]))
(;B[cs]C[FORCE];W[bs]C[FORCE]
(;B[cr]C[FORCE];W[as]C[RIGHT])
(;B[dr]C[FORCE];W[cr]))
(;B[dq]C[FORCE];W[cr])
(;B[dr]C[FORCE]
(;W[bs]C[FORCE];B[cr]C[FORCE];W[cs]C[FORCE];B[ds]C[FORCE];W[as])
(;W[cs]C[FORCE];B[cr]C[FORCE];W[bs]C[FORCE];B[ds]C[FORCE];W[as]))
(;B[ds]C[FORCE];W[cr]))