at a glance, this problem looks too easy to be worth your bother. but on second look, it's clearly impossible. eventually you have an epiphany and it looks easy again. and then... well, you'll see.
(;SZ[19]AW[bq]AW[cq]AW[dq]AW[eq]AW[fq]AW[gq]AW[cr]AW[gr]AW[gs]AB[bn]AB[co]AB[do]AB[eo]AB[go]AB[bp]AB[hp]AB[aq]AB[iq]AB[br]AB[er]AB[ir]AB[fs]AB[is]C[woe is white... or is she?]GM[1]FF[4]CA[UTF-8]AP[CGoban:2]ST[2]RU[Japanese]KM[0.00]PW[White]PB[Black]PL[W]
(;W[es];B[ds]
(;W[ar];B[as]
(;W[bs];B[cs]C[you're quite smart so far.]
(;W[fr]
(;B[es]C[CHOICE];W[dr];B[ap];W[bs];B[cs];W[es]C[RIGHT])
(;B[dr];W[es]C[hopeless ko for blackRIGHT]))
(;W[dr];B[fr]C[bet you didn't see this move coming, eh?];W[es];B[fr];W[bs];B[cs]))
(;W[cs];B[ar]
(;W[dr];B[es];W[fr];B[es])
(;W[fr];B[es];W[dr]))
(;W[fr];B[ap])
(;W[dr];B[ap]
(;W[bs];B[ar])
(;W[cs];B[es])
(;W[fr];B[es])))
(;W[cs];B[ar]
(;W[dr];B[es];W[fr];B[es])
(;W[fr];B[es];W[dr]))
(;W[bs];B[ar])
(;W[dr];B[ar]
(;W[fr];B[es])
(;W[cs]))
(;W[as];B[ar])
(;W[fr]
(;B[ar]C[CHOICE];W[es]C[ko])
(;B[es]
(;W[ar];B[as]
(;W[bs];B[cs];W[dr];B[ap];W[bs];B[cs];W[es]C[RIGHT])
(;W[dr];B[ap]
(;W[bs];B[ar])
(;W[cs];B[es]))
(;W[cs];B[ap]))
(;W[cs];B[ar];W[dr])
(;W[dr];B[ar])
(;W[bs];B[ar]))))
(;W[ar];B[as]
(;W[es]
(;B[ds]C[CHOICE]
(;W[bs];B[cs]C[you're quite smart so far.]
(;W[fr]
(;B[es]C[CHOICE];W[dr];B[ap];W[bs];B[cs];W[es]C[RIGHT])
(;B[dr];W[es]C[hopeless ko for blackRIGHT]))
(;W[dr];B[fr]C[bet you didn't see this move coming, eh?];W[es];B[fr];W[bs];B[cs]))
(;W[cs];B[ar]
(;W[dr];B[es];W[fr];B[es])
(;W[fr];B[es];W[dr];B[es]))
(;W[fr];B[ap])
(;W[dr];B[ap]
(;W[bs];B[ar])
(;W[cs];B[es])
(;W[fr];B[es]
(;W[bs];B[ar])
(;W[cs];B[es]))))
(;B[fr]
(;W[dr]
(;B[fr];W[cs]C[RIGHT])
(;B[cs];W[fr]C[RIGHT]))
(;W[ds];B[ar])))
(;W[bs];B[cs]
(;W[es];B[fr]
(;W[dr];B[fr])
(;W[ds];B[ar]
(;W[dr];B[fr])
(;W[bs];B[ap])))
(;W[dr];B[es]
(;W[ds];B[ar])
(;W[fr];B[ar];W[ds];B[es]))
(;W[fr];B[es]
(;W[ds];B[ar])
(;W[dr];B[ar];W[ds];B[es]))
(;W[ds];B[ar]
(;W[fr];B[es])
(;W[bs];B[ap])
(;W[dr];B[es])))
(;W[cs];B[ar]
(;W[es];B[ds]
(;W[dr];B[es];W[fr];B[es])
(;W[fr];B[es];W[dr]))
(;W[fr];B[es])
(;W[dr];B[es])
(;W[ds]C[nice. dead in gote.]))
(;W[ds];B[ar]
(;W[es];B[fr])
(;W[fr];B[es]))
(;W[fr];B[es]
(;W[cs];B[ar])
(;W[ds];B[ar])
(;W[dr];B[ar]))
(;W[dr];B[es]
(;W[cs];B[ar])
(;W[ds];B[ar])))
(;W[cs];B[ar]C[now, just make two eyes here and you're set...]
(;W[ds]C[gote dead])
(;W[es];B[ds]
(;W[dr];B[es];W[fr];B[es])
(;W[fr];B[es];W[dr];B[es]))
(;W[fr];B[es])
(;W[dr];B[es]))
(;W[ds];B[ar]
(;W[fr];B[es])
(;W[es];B[fr]))
(;W[dr];B[ar]
(;W[cs];B[es])
(;W[ds];B[es])
(;W[fr];B[es])
(;W[es];B[ds]
(;W[fr];B[es])
(;W[cs];B[es];W[fr];B[es])))
(;W[fr];B[es]
(;W[ds];B[ar])
(;W[ar];B[as]
(;W[cs];B[ar])
(;W[ds];B[ar])
(;W[dr];B[ar])))
(;W[bs];B[ar])
(;W[ap];B[ar])
(;W[fp];B[ar])
(;W[gp];B[ar])
(;W[as];B[ar])
(;W[cp];B[ar])
(;W[ao];B[ap]))