(;GM[1]FF[4]AP[Drago:4.22.03]SZ[19]CA[UTF-8]PB[Black to play and live]AB[qr][pr][pq][pp][nr][np][mq][lp][mp]AW[rr][rs][qq][rp][oq][lr][lq][kp][ko][lo][nn][on][pn][qn][ip][hq]
(;B[mr]C[This looks like a way to remove a weak point.];W[qs]C[Hoever White can push here.];B[ms]
;W[os]C[This threatens to link out or kill.];B[ps]
(;W[or]C[This is a mistake leading to seki.];B[op])
(;W[op]C[White must play here.];B[oo];W[po];B[no];W[or]))
(;B[qs]C[This is the correct move to enlarge Black's eye space.];W[os]C[White must play here to try to kill.];B[or]
;W[ns]C[This is the normal way White makes the edge eye false.];B[mr]C[However Black can play here
rather than one line lower.];W[ms]
;B[kq]C[Then Black makes use of this cut.];W[kr];B[ls];W[ks];B[ps];W[ls]
;B[jq]C[White's edge stones cannot escape.]))
