The second of two interesting life and death tesuji pulled from some games played by a friend of mine. According to him, after this exchange, black resigned: "what just happened...?"
(;GM[1]FF[4]CA[UTF-8]AP[CGoban:2]ST[2]
RU[Japanese]SZ[19]KM[0.00]TM[]
AW[em][dn][gn][bo][ho][cp][dp][hp][aq][bq][gq][hq][dr][hr][hs]AB[eo][go][ep][gp][cq][dq][fq][ar][br][er][gr][gs]C[White to kill. Yes, everything.]PL[W]
(;W[cr]CR[cr]
;B[eq]CR[eq]
(;W[cs]CR[cs]
;B[es]CR[es]
(;W[fo]CR[fo]
;B[ds]CR[ds]
(;W[bs]CR[bs]
;B[as]CR[as]
;W[cr]CR[cr]C[Black is caught! RIGHT])
(;W[fp]CR[fp]
;B[bs]CR[bs]C[Wha?]))
(;W[bs]CR[bs]
;B[fo]SQ[fp][fr][fs]CR[fo]C[Black gets two eyes.])
(;W[fr]CR[fr]
;B[fs]CR[fs]
(;W[bs]CR[bs]
;B[fo]SQ[fp][fr]CR[fo]C[Black gets two eyes.])
(;W[fo]CR[fo]
;B[ds]CR[ds]
(;W[bs]CR[bs]
;B[as]CR[as]
;W[cr]CR[cr]C[Black is caught! RIGHT])
(;W[fp]CR[fp]
;B[bs]CR[bs]C[Wha?])))
(;W[fs]CR[fs]
;B[fr]CR[fr]
(;W[bs]CR[bs]
;B[fo]SQ[fp][fs]CR[fo]C[Black gets two eyes.])
(;W[fo]CR[fo]
;B[ds]CR[ds]
(;W[bs]CR[bs]
;B[as]CR[as]
;W[cr]CR[cr]C[Black is caught! RIGHT])
(;W[fp]CR[fp]
;B[bs]CR[bs]C[Wha?]))))
(;W[es]CR[es]
;B[cs]CR[cs]
(;W[fr]CR[fr]
;B[ds]TR[gr][gs]CR[ds]C[White only gets two stones.])
(;W[ds]CR[ds]
;B[fs]CR[fs]C[No.])
(;W[bs]CR[bs]
;B[ds]CR[ds]C[No.]))
(;W[bs]CR[bs]
;B[ds]CR[ds]
(;W[as]CR[as]
;B[fo]CR[fo]
(;W[fs]CR[fs]
;B[fr]SQ[fp][fs]CR[fr]C[Black gets two eyes.])
(;W[es]CR[es]
;B[fs]SQ[fp][fr]CR[fs]C[Black gets two eyes.]))
(;W[cs]CR[cs]
;B[as]CR[as]
;W[cr]CR[cr]
;B[fo]TR[ar][br][as]CR[fo]C[Clever, but not clever enough. Black is still alive.])
(;W[fo]CR[fo]
;B[cs]TR[go][gp]CR[cs]C[White only gets two stones.]))
(;W[fo]CR[fo]
;B[cs]TR[go][gp]CR[cs]C[White only gets two stones.]))
(;W[fo]CR[fo]
;B[cr]TR[go][gp]CR[cr]C[White only gets two stones.])
(;W[es]CR[es]
;B[cr]CR[cr]
(;W[fr]CR[fr]
;B[ds]TR[gr][gs]CR[ds]C[White only gets two stones.])
(;W[fo]CR[fo]
;B[ds]TR[go][gp]CR[ds]C[White only gets two stones.]))
(;W[ds]CR[ds]
;B[cr]CR[cr]
;W[es]CR[es]
;B[fr]CR[fr]C[Black keeps everything.]))
