(;AW[ar]AW[br]AW[cs]AW[ds]AW[es]AW[fr]AW[gr]AW[hr]AW[hs]AB[aq]AB[cq]AB[bq]AB[dq]AB[eq]AB[fq]AB[gq]AB[hq]AB[iq]AB[is]AB[ir]C[Black can't kill White but has the best result.FORCE]AP[goproblems]
(;B[as]C[FORCE];W[cr]C[FORCE];B[er]C[FORCE];W[fs])
(;B[bs]C[FORCE];W[cr]C[FORCE];B[er]C[FORCE];W[fs])
(;B[cr]C[FORCE];W[bs]C[FORCE]
(;B[dr]C[FORCE];W[er])
(;B[er]C[FORCE];W[fs]C[RIGHT])
(;B[fs]C[FORCE];W[er])
(;B[gs]C[FORCE];W[er]))
(;B[dr]C[FORCE]
(;W[cr]C[FORCE];B[er]C[FORCE];W[fs])
(;W[er]C[FORCE];B[cr]C[FORCE];W[bs]))
(;B[er]C[FORCE];W[fs]C[FORCE]
(;B[as]C[FORCE];W[cr])
(;B[bs]C[FORCE];W[cr])
(;B[cr]C[FORCE];W[bs]C[RIGHT])
(;B[dr]C[FORCE];W[cr]))
(;B[fs]C[FORCE];W[er]C[FORCE];B[cr]C[FORCE];W[bs])
(;B[gs]C[FORCE];W[er]))