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