(;GM[1]FF[4]AP[Drago:4.22.03]SZ[19]CA[UTF-8]AB[sr][rq][rp][qq][pr][ps][or][os]AW[nr][ns][nq][oq][pq][qr][qp][qo][ro][so]C[Black to play and live.]
(;B[rr]C[It looks like threatening to capture the stone attacking the four black stones will enable an under-the-stones eye.];W[rs]C[However White doesn't take but plays here killing Black.])
(;B[rs]C[This is the correct play to threaten to save the four stones or make two eyes on the side.]
(;W[sp];B[qs])
(;W[qs];B[rr]
(;W[pr];B[sp])
(;W[sp];B[pr]))))
