(;AW[ap]AW[bp]AW[cp]AW[br]AW[dr]AW[cr]AB[ao]AB[bo]AB[co]AB[do]AB[dp]AB[eq]AB[er]AB[ds]AP[goproblems]
(;B[cs]
(;W[bs]
(;B[dq]
(;W[cq];B[aq];W[ar])
(;W[ar];B[cq];W[bq]))
(;B[aq];W[ar])
(;B[ar]
(;W[aq];B[cq]
(;W[as];B[dq]C[RIGHT])
(;W[dq];B[bq]C[RIGHT]))
(;W[dq];B[bq]C[RIGHT])))
(;W[dq];B[bq];W[bs];B[aq];W[cq];B[ar]C[RIGHT]))
(;B[ar];W[cs]
(;B[dq];W[cq];B[aq];W[as];B[bs];W[es]
(;B[fs];W[as]C[Double ko, White lives.])
(;B[as];W[fr]C[A clever attempt to create ko in the corner, but if White escapes it is all for naught. And ko is not good enough anyway.]))
(;B[cq];W[dq])
(;B[aq];W[bq])
(;B[bq];W[cq])))
