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