(;GM[1]FF[4]CA[UTF-8]AP[CGoban:3]ST[2]RU[Japanese]SZ[19]KM[0.00]
AW[mn][nn][lo][oo][mp][np][nq][oq][pq][jr][kr][lr][mr][ks]AB[mm][nm][kn][ln][on][pn][jo][qo][jp][op][pp][hq][jq][qq][ir][or]
[pr][js]C[Black to play and kill.]
(;B[ms]C[If Black takes away the edge eye, then there are still two eyes in the middle.]
(;W[kp]C[White cannot defend this way though.];B[kq];W[lq];B[ko]
(;W[lp]
;B[no]C[Dead.])
(;W[no]
;B[lp]C[Ko.]))
(;W[no]C[White can defend here.];B[lq];W[kq];B[lp]
;W[kp]C[Alive.]))
(;B[lq]C[This is the correct place to start.];W[kq];B[lp];W[kp];B[ko];W[mq];B[lp]
(;W[no]C[This is White's best response to get a ko for life.];B[mo])
(;W[ms];B[mo])
(;W[lq]
(;B[ms]C[Wrong.])
(;B[no]
(;W[mo]
;B[ms]C[Dead.])
(;W[ms];B[mo])))
(;W[mo]
;B[ms]C[Dead.])))
