(;GM[1]FF[4]AP[Drago:4.22.03]SZ[19]CA[UTF-8]AB[rq][qr][qs][ps][oq][ms][mr][mq][np][mo][oo][po][qo][ro]AW[rr][qq][pr][os][or][ns][nq][op][pp]C[Black to play and kill]
(;B[qp]C[This is the correct play - it looks a bit simplistic.];W[pq]
(;B[rs]C[This is the clever next play which is hard to see.];W[ss];B[qs];W[nr]
;B[qr]C[It is self-atari for White to play either side.])
(;B[sr]C[This atari clearly fails.];W[rs]
(;B[qs];W[nr])
(;B[nr];W[qs])))
(;B[rs]C[Playing this first fails.];W[ss];B[qs]
;W[rp]C[White can make another eye here.];B[qp];W[sq];B[pq]))
