As it happens, I had probably mistyped the pattern search before submitting, and a problem with this same idea (1293) has already been posted by gecko.
(;AB[cr]AB[dr]AB[eq]AB[fq]AB[gr]AB[hr]AW[dq]AW[gq]AW[hq]AW[ir]AW[jq]AW[cq]AW[br]AW[eo]AW[do]AW[fo]AW[go]LB[bo:A]C[Play at A if you think black is unconditionally dead.]AP[goproblems]
(;B[bs]
(;W[bq]
(;B[fs];W[er]
(;B[cs]C[];W[hs];B[es]C[Well done! (navigate solution for white's strongest resistance)RIGHT])
(;B[hs];W[ds])
(;B[fr];W[hs])
(;B[es];W[cs]))
(;B[es];W[fr]
(;B[fs];W[hs]
(;B[gs];W[cs])
(;B[cs];W[gs])
(;B[er];W[cs]))
(;B[cs];W[hs])
(;B[er];W[hs]
(;B[fs];W[cs])
(;B[cs];W[gs]))
(;B[gs];W[cs]))
(;B[er];W[fs])
(;B[fr];W[es])
(;B[cs];W[hs]
(;B[fs];W[es];B[er];W[is])
(;B[es];W[fr])
(;B[gs];W[fr])
(;B[fr];W[es])
(;B[er];W[gs]))
(;B[hs];W[fs]
(;B[es];W[fr]
(;B[cs];W[is])
(;B[er];W[cs]))
(;B[cs];W[es])
(;B[fr];W[es])))
(;W[aq]C[This is white's strongest resistance.];B[fs];W[er];B[cs];W[es];B[hs];W[as];B[ar]C[white can make a ko, but she must also risk much.]))
(;B[fs];W[er]
(;B[es];W[cs])
(;B[hs];W[cs])
(;B[cs];W[bs])
(;B[bs];W[ds])
(;B[fr];W[cs])
(;B[bq];W[cs]))
(;B[es];W[fr]
(;B[fs];W[hs]
(;B[bs];W[bq]
(;B[cs];W[gs])
(;B[gs];W[cs])
(;B[er];W[cs]))
(;B[cs];W[gs])
(;B[er];W[cs])
(;B[gs];W[cs]))
(;B[hs];W[is])
(;B[cs];W[hs])
(;B[bs];W[bq]
(;B[fs];W[hs]
(;B[er];W[cs])
(;B[cs];W[gs])
(;B[gs];W[cs]))
(;B[cs];W[hs])
(;B[er];W[hs]
(;B[cs];W[gs])
(;B[fs];W[cs]))
(;B[gs];W[cs]))
(;B[bq];W[bp]
(;B[bs];W[aq];B[cs];W[hs])
(;B[gs];W[cs])
(;B[fs];W[hs];B[bs];W[aq]
(;B[gs];W[cs])
(;B[er];W[cs])
(;B[cs];W[gs]))
(;B[cs];W[hs])
(;B[er];W[hs]
(;B[fs];W[cs])
(;B[cs];W[gs]))))
(;B[fr];W[es])
(;B[bq];W[bp];B[bs];W[aq]
(;B[fs];W[er];B[cs];W[as]C[Easy ko for white])
(;B[es];W[fr]
(;B[cs];W[gs])
(;B[fs];W[hs]
(;B[gs];W[cs])
(;B[er];W[cs]))
(;B[hs];W[is])
(;B[er];W[hs]
(;B[cs];W[gs])
(;B[fs];W[cs]))))
(;B[er];W[fs]
(;B[bs];W[bq])
(;B[cs];W[es])
(;B[es];W[cs])
(;B[bq];W[bp];B[bs];W[aq]
(;B[cs];W[es])
(;B[es];W[cs])))
(;B[cs];W[hs]
(;B[fs];W[es];B[er];W[is])
(;B[es];W[fr])
(;B[fr];W[es])
(;B[er];W[fs]))
(;B[ar];W[bq]C[this is a dead shape.])
(;B[hs];W[fs];B[es];W[fr]
(;B[cs];W[is])
(;B[er];W[cs])
(;B[bs];W[bq];B[er];W[cs])
(;B[bq];W[bp]
(;B[bs];W[aq];B[cs];W[is])
(;B[er];W[cs])))
(;B[bo]C[No, there still is some life in the black stones.]))