(;GM[1]FF[4]AP[Drago:4.22.03]SZ[19]CA[UTF-8]AB[rq][qr][pr][nr][nq][np][mr]AW[rr][qq][rp][pp][oo][no][mo][mp][mq][lr][lq][qn]C[Black to play and live]
(;B[os]C[This is sometimes an eye-making play];W[oq];B[pq];W[op]
(;B[qp]
;W[sq]C[But it leads to a ko])
(;B[sq]C[Black could try here.];W[qs];B[qp]
;W[ro]C[This is still only one eye]))
(;B[pq]C[This is the correct first play.];W[sq]
(;B[op]C[However this is wrong.];W[ms];B[ns];W[qs];B[ps];W[or])
(;B[os]C[Now this point works.]
(;W[ms]C[The two hanes are equivalent and do not kill];B[qs])
(;W[qs];B[ms]))))
