(;AB[ar]AB[bq]AB[cr]AB[bo]AB[cp]AB[do]AB[fo]AB[fp]AB[go]AB[hp]AB[hq]AB[hr]AB[jr]AW[gr]AW[gq]AW[gp]AW[br]AW[bs]AW[cq]AW[dq]AW[eq]AW[ds]TR[gp]TR[go]C[This situation is like problem 4051 except for the marked stones. Black can now kill White!]AP[goproblems]
(;B[gs];W[fs]
(;B[er];W[fq]
(;B[dr]C[This is not a seki but a 3 space big eye. Black can put White in atari by filling outside liberties.RIGHT])
(;B[fr];W[dr])
(;B[hs];W[dr])
(;B[es];W[dr])
(;B[cs];W[dr]))
(;B[fq];W[fr]
(;B[er];W[hs]
(;B[dr]C[RIGHT])
(;B[cs];W[dr])
(;B[es];W[dr])
(;B[is];W[dr]))
(;B[dr];W[er])
(;B[hs];W[dr])
(;B[es];W[er])
(;B[cs];W[dr]))
(;B[fr];W[fq]
(;B[es];W[er]C[Alive and kicking.])
(;B[er];W[dr])
(;B[dr];W[er])
(;B[hs];W[er]))
(;B[hs];W[fq])
(;B[dr];W[er])
(;B[es];W[er])
(;B[cs];W[dr]))
(;B[fr];W[fq]
(;B[gs];W[fs]
(;B[es];W[er]C[White is very much alive now.])
(;B[er];W[dr])
(;B[dr];W[er])
(;B[cs];W[dr]
(;B[es];W[er])
(;B[hs];W[er]))
(;B[hs];W[er]))
(;B[cs];W[dr];B[gs];W[fs];B[es];W[er])
(;B[dr];W[er])
(;B[er];W[dr]
(;B[gs];W[fs])
(;B[hs];W[gs])
(;B[fs];W[gs]))
(;B[es];W[er])
(;B[fs];W[gs])
(;B[aq];W[dr]))
(;B[fq];W[fr]
(;B[gs];W[fs]
(;B[er];W[es]
(;B[dr];W[cs]
(;B[dr]C[RIGHT])
(;B[hs];W[dr])
(;B[cr];W[dr])
(;B[er];W[dr]))
(;B[hs];W[dr])
(;B[cs];W[dr])
(;B[aq];W[dr])
(;B[as];W[aq]))
(;B[dr];W[er])
(;B[es];W[er])
(;B[hs];W[dr])
(;B[cs];W[dr]))
(;B[er];W[dr]
(;B[gs];W[es])
(;B[fs];W[es])
(;B[hs];W[es])
(;B[es];W[fs]))
(;B[fs];W[es])
(;B[es];W[er])
(;B[dr];W[er])
(;B[cs];W[dr])
(;B[as];W[aq])
(;B[dp];W[dr])
(;B[ep];W[dr])
(;B[hs];W[er]))
(;B[er];W[dr]
(;B[fq];W[fr]
(;B[gs];W[es])
(;B[fs];W[es])
(;B[hs];W[es])
(;B[es];W[fs]))
(;B[gs];W[fr]
(;B[fs];W[es])
(;B[fq];W[es])
(;B[hs];W[fs])
(;B[es];W[fs]))
(;B[fr];W[fq]
(;B[gs];W[fs])
(;B[fs];W[gs])
(;B[hs];W[gs]))
(;B[fs];W[fr]
(;B[gs];W[es])
(;B[fq];W[es])
(;B[es];W[gs])
(;B[hs];W[es]))
(;B[es];W[fr])
(;B[hs];W[fq]))
(;B[dr];W[er])
(;B[es];W[er])
(;B[fs];W[gs]
(;B[fr];W[fq])
(;B[er];W[fq]
(;B[dr];W[cs])
(;B[cs];W[dr])
(;B[fr];W[dr])
(;B[aq];W[dr])
(;B[es];W[dr]))
(;B[fq];W[fr]
(;B[er];W[es])
(;B[hs];W[er])
(;B[dr];W[er])
(;B[es];W[er])
(;B[cs];W[dr]))
(;B[hs];W[fq])
(;B[dr];W[er])
(;B[es];W[er])
(;B[aq];W[dr])
(;B[as];W[aq])
(;B[cs];W[dr]))
(;B[cs];W[dr])
(;B[as];W[aq])
(;B[aq];W[fq])
(;B[hs];W[er])
(;B[ep];W[fq])
(;B[ho];W[fq]))