(;AB[ar]AB[as]AB[bs]AB[cs]AB[ds]AW[es]AW[er]AW[eq]AW[cq]AW[dq]AW[bq]AW[aq]AB[ao]AB[bo]AB[co]AB[cp]AB[dp]AB[ep]AB[fp]AB[fq]AB[fr]AB[fs]C[Black can't kill White but has the best result.FORCE]AP[goproblems]
(;B[ap]C[FORCE]
(;W[br]C[FORCE]
(;B[bp]C[RIGHT])
(;B[cr]AB[cr])
(;B[dr]AB[dr]))
(;W[cr]C[FORCE]
(;B[bp]C[RIGHT])
(;B[br]AB[br])
(;B[dr]AB[dr]))
(;W[dr]C[FORCE]
(;B[bp]C[RIGHT])
(;B[br]AB[br])
(;B[cr]AB[cr])))
(;B[bp]C[FORCE]
(;W[br]C[FORCE]
(;B[ap]C[RIGHT])
(;B[cr]AB[cr])
(;B[dr]AB[dr]))
(;W[cr]C[FORCE]
(;B[ap]C[RIGHT])
(;B[br]AB[br])
(;B[dr]AB[dr]))
(;W[dr]C[FORCE]
(;B[ap]C[RIGHT])
(;B[br]AB[br])
(;B[cr]AB[cr])))
(;B[br])
(;B[cr])
(;B[dr]))