(;AW[cs]AW[cr]AW[cq]AW[cp]AW[bp]AW[ap]AB[ds]AB[dr]AB[dq]AB[dp]AB[do]AB[co]AB[bo]AB[ao]AP[goproblems]
(;B[br]
(;W[bs]
(;B[ar]C[RIGHT])
(;B[aq];W[ar];B[as]C[ko]))
(;W[ar];B[bs]LB[bq:A]C[White cannot play at ARIGHT]))
(;B[ar];W[br]
(;B[aq];W[as];B[bs])
(;B[as];W[aq])
(;B[bs];W[as]))
(;B[bq];W[br]
(;B[ar];W[aq])
(;B[as];W[ar]))
(;B[bs];W[br]
(;B[as];W[ar])
(;B[ar];W[as]C[ko])
(;B[aq];W[ar]))
(;B[as];W[ar]
(;B[br];W[bs])
(;B[bs];W[br])
(;B[bq];W[br]))
(;B[aq];W[ar]
(;B[bq];W[br])
(;B[br];W[bq])
(;B[bs];W[br])
(;B[as];W[br])))