(;GM[1]FF[4]AP[Drago:4.22.03]SZ[19]CA[UTF-8]C[Black to play and live.]AB[rr][rq][qp][pq][pr][or]AW[lr][nr][nq][pp][po][qq][rp][ro][oq]
(;B[sq]C[Black can try to maximise the living space by playing here.];W[os];B[ps]
;W[ss]C[But this play kills.]
(;B[qr];W[rs])
(;B[rs];W[qr];B[qs];W[qq]))
(;B[os]C[Black must maximise the space by playing this side.];W[sq];B[sr]
(;W[qr];B[qs]
;W[qq]C[Alive])
(;W[qs]C[This looks like an eye-preventing move.];B[rs];W[qr];B[ps];W[qq]
;B[qr]C[Black still lives])))
