(;GM[1]FF[4]AP[Drago:4.22.03]SZ[19]CA[UTF-8]AB[rs][rr][rq][qp][qo][po][mo][mn][lp][kp][kq][kr][ls][ir][pq][or]
[mq]AW[ms][mr][lr][lq][mp][np][op][pp][qq][qr][pr][os]C[Black to play and kill.]
(;B[oq]C[Black cannot make a killing shape by playing inside the white group.];W[nq])
(;B[qs]C[Playing here does not work either.];W[oq];B[ps];W[nr])
(;B[ps]C[This is the correct first play. If white takes this stone it is a snapback on four white stones.];W[oq]
;B[ns]L[nr][qs]C[Black takes here and now White playing either A or B is self-atari. White is dead.]))
