(;AW[br]AW[cs]AW[cq]AW[dq]AW[er]AW[ds]AB[eq]AB[fq]AB[fr]AB[fs]AW[es]AB[ep]AB[dp]AB[cp]AB[bp]LB[ap:a]LB[aq:b]LB[bq:c]LB[ar:d]C[Black can't kill White but has the best result.FORCE]AP[goproblems]
(;B[ap]C[FORCE]
(;W[aq]C[FORCE];B[bq]C[FORCE];W[ar])
(;W[bq]C[FORCE];B[aq]C[FORCE];W[ar]))
(;B[aq]C[FORCE];W[ar]C[FORCE]
(;B[ap]C[FORCE];W[bq])
(;B[bq]C[RIGHT]))
(;B[bq]C[FORCE];W[aq]C[FORCE];B[ap]C[FORCE];W[ar])
(;B[ar]C[FORCE];W[aq]))