(;GM[1]FF[4]CA[UTF-8]AP[CGoban:2]ST[2]
RU[Japanese]SZ[19]KM[0.00]
PW[White]PB[Black]AW[mp][op][pp][qp][rp][rq][lr][mr]AB[pq][qq][nr][pr][rr]C[White to kill.]PL[W]
(;W[qs]CR[qs]
(;B[oq]CR[oq]
;W[sr]CR[sr]
;B[rs]CR[rs]
;W[os]CR[os]
;B[ns]CR[ns]
;W[ps]LB[oq:2][sr:3][ns:6][os:5][ps:7][qs:1][rs:4]C[black is dead, this is not seki when all the outside liberties are filled.])
(;B[sr]CR[sr]C[variation.]
;W[ns]CR[ns]
;B[os]CR[os]
;W[oq]CR[oq]
(;B[rs]CR[rs]
;W[or]CR[or]
;B[ms]CR[ms]
;W[ps]CR[ps]C[black only has one eye, since white can throw in.])
(;B[or]CR[or]C[variation.]
;W[rs]CR[rs]C[black is dead.]))
(;B[rs]CR[rs]C[variation.]
;W[sr]CR[sr]
;B[oq]CR[oq]
;W[os]CR[os]C[return to main variation, black will die.]))
(;W[ns]CR[ns]C[not good.]
;B[os]CR[os]
;W[qs]CR[qs]
;B[oq]CR[oq]
;W[rs]CR[rs]
;B[sr]CR[sr]
;W[nq]CR[nq]
;B[ms]CR[ms]
;W[ls]CR[ls]C[only ko.])
(;W[sr]CR[sr]C[not good.]
;B[qs]CR[qs]LB[rs:A]C[now white can only get a ko at A.]))