(;GM[1]FF[4]AP[Drago:4.22.03]SZ[19]CA[UTF-8]AB[rr][qr][pr][nr][mr][lr]AW[sr][rq][qq][qo][op][nq][mq][lq][kq][kr]C[Black to play and live.]
(;B[pq]C[If black tries to push up, then White can reduce the group to one eye.];W[oq];B[or];W[ls];B[ms];W[os];B[rs];W[ps])
(;B[ls]C[This looks like eye-making, but White uses the gap in the wall to kill. The same play at the other end also fails.];W[or];B[os];W[oq])
(;B[os]C[This is the vital point in the shape to make two eyes.];W[oq]C[This has no effect.];B[or];W[ls];B[ms];W[rs]
;B[qs]C[Black is alive.]))
