(;GM[1]FF[4]CA[UTF-8]AP[CGoban:3]ST[2]
RU[Japanese]SZ[19]KM[0.00]
PB[Black to play]AW[nn][on][pn][qn][rn][sn][mo][lq][nq][qq][sq][nr][or][qr][rr][ps]AB[oo][po][qo][ro][so][op][qp][oq][pq][rq][pr]
(;B[sp]C[Black needs a second eye but cannot get one here]
;W[sr]
;B[qs]
;W[rs])
(;B[sr]C[This might be a way to set up a ko]
(;W[ss]
;B[sp]
;W[rp]
;B[pk]
;W[pj]
;B[rq]
;W[qs]
;B[sr]
;W[qk]
;B[qj]
;W[sq])
(;W[rp]
;B[sp]
(;W[ss]
;B[rq]
;W[qs]
;B[sr]
;W[pk]
;B[pj]
;W[sq])
(;W[rq]
;B[rs]
;W[ss]
;B[pl]
;W[pk]
;B[sr])
(;W[qs]C[White cannot connect as Black lives without ko.]
;B[rq]))
(;W[sp]
;B[rs]
;W[ss])
(;W[qs]
;B[sp]))
(;B[qs]C[It seems the throw in here also works.]
(;W[os]C[This is a mistake by White though.]
;B[sr]
;W[rp]
;B[sp]
(;W[rs]
;B[rq])
(;W[ss]
;B[rq]))
(;W[rs]C[This is the correct response.]
;B[sr]
(;W[rp]
;B[sp]
;W[rq]C[Black dies.])
(;W[ss]C[This is another mistake.]
;B[sp]))))
