(;AB[cr]AB[cq]AB[cp]AB[bo]AB[bn]AW[bm]AW[cm]AW[cn]AW[co]AW[dp]AW[dq]AW[dr]AB[bl]AB[cl]AW[an]AB[bs]AW[br]AB[ap]AW[eo]AW[ds]AP[goproblems]
(;W[ar];B[bq]
(;W[cs];B[aq];W[am];B[as];W[ao]C[RIGHT])
(;W[am];B[ao];W[cs]C[RIGHT]))
(;W[cs];B[ar]C[Only ko, white can do better.])
(;W[bq];B[ar];W[cs];B[bp];W[as]C[Only ko, white can do better.])
(;W[am];B[ar])
(;W[aq];B[bq];W[ar];B[as]))