(;GM[1]FF[4]AP[Drago:4.22.03]SZ[19]CA[UTF-8]AB[pr][pq][qq][pp][op][np][mp][mq][mr][ms][lq]AW[lr][kr][kq][lp][lo][mo][no][oo][po][qo][qp][rq][rr][qr][or]C[Black to play and live.]
(;B[ps]C[Making a big eye space does not work.];W[nr])
(;B[nr]C[This is the correct play.]
(;W[os]C[This is White's best continuation.];B[ps]
;W[oq]C[Black lives in seki.])
(;W[ps]C[This allows Black to live with territory.];B[os];W[ns]
;B[oq]C[White cannot save the two stones.])))
