(;AW[as]AW[ar]AW[aq]AW[cs]AW[cr]AW[cq]AW[es]AW[er]AW[eq]AB[fs]AB[fr]AB[fq]AB[fp]AB[ep]AB[cp]AB[dp]AB[bp]AB[ap]C[Black is impossible to kill White but has the best result.FORCE]AP[goproblems]
(;B[bq]C[FORCE];W[br]C[FORCE]
(;B[dq]C[FORCE];W[dr]C[RIGHT])
(;B[dr]C[FORCE];W[dq])
(;B[ds]C[FORCE];W[dq]))
(;B[dq]C[FORCE];W[dr]C[FORCE]
(;B[bq]C[FORCE];W[br]C[RIGHT])
(;B[br]C[FORCE];W[bq])
(;B[bs]C[FORCE];W[bq]))
(;B[br]C[FORCE];W[bq]C[FORCE];B[dq]C[FORCE];W[dr])
(;B[bs]C[FORCE]
(;W[bq]C[FORCE];B[dq]C[FORCE];W[dr])
(;W[dq]C[FORCE];B[bq]C[FORCE];W[br]))
(;B[dr]C[FORCE];W[dq]C[FORCE];B[bq]C[FORCE];W[br])
(;B[ds]C[FORCE]
(;W[bq]C[FORCE];B[dq]C[FORCE];W[dr])
(;W[dq]C[FORCE];B[bq]C[FORCE];W[br])))