(;AW[dp]AW[ep]AW[fp]AW[fq]AW[fr]AW[er]AB[do]AB[co]AB[cp]AB[eq]AB[dq]AB[dr]AB[bq]AW[bo]AW[cn]AW[bm]AW[fn]AW[em]C[Black to live! (2 possibilities and additional one seki)]AP[goproblems]
(;B[bs];W[ar]
(;B[bp];W[cr];B[br]C[RIGHT];W[ds];B[cq]C[RIGHT])
(;B[ds];W[aq];B[ap];W[bp];B[br]
(;W[cr];B[as];W[aq])
(;W[ao];B[cr]))
(;B[br];W[bp];B[aq];W[ds];B[cs];W[cq];B[es];W[fs])
(;B[aq];W[ds];B[cs];W[cr]
(;B[cq];W[br])
(;B[br];W[cq])
(;B[es]
(;W[br]LB[cq:A]C[White must not play A, tenuki is good!]))))
(;B[cr];W[bp];B[bs];W[ar]
(;B[ds];W[aq])
(;B[aq];W[ds]))
(;B[br];W[bp]
(;B[aq];W[as]
(;B[cq];W[cs];B[ds];W[bs]C[Black is dead in bent four in the corner.])
(;B[bs];W[cq];B[cr];W[ds]))
(;B[cq];W[cs];B[ds];W[aq];B[ar];W[bs]))
(;B[ar];W[bs]
(;B[bp];W[ds])
(;B[cr];W[bp])
(;B[cs];W[bp]
(;B[br];W[cq])
(;B[cq];W[br]))
(;B[ds];W[bp]))
(;B[cs];W[bp]
(;B[cq];W[br];B[ar];W[bs])
(;B[br];W[cq];B[aq];W[as]))
(;B[bp];W[cr]
(;B[cs]
(;W[bs]
(;B[ds];W[br];B[ar];W[ap])
(;B[br];W[ds];B[cq];W[cs])
(;B[cq];W[br];B[ds];W[ar]))
(;W[br]
(;B[bs];W[ar];B[ap];W[es];B[ds]LB[cq:A]C[Whith must not play A!])
(;B[ar];W[bs]
(;B[ap];W[ds];B[cq])
(;B[ds];W[ap]LB[cq:A]C[Whith must not play A!]))))
(;B[br];W[ds];B[cq];W[cs];B[bs];W[es];B[ap];W[ar])))