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