(;GM[1]FF[4]SZ[19]AP[SmartGo:0.9.0.1]CA[utf-8]C[Black to play and live.]AB[ip][jp][gq][hq][kq][kr]AW[ho][io][jo][gp][kp][lp][eq][fq][lq][lr]
(;B[ir]C[This is the correct first play.];W[gr];B[hr];W[fr]
;B[ks]C[Black lives.])
(;B[fr]C[Enlarging the eye space with this fails.];W[er]
(;B[gr]
;W[ir]C[This is the vital point];B[jr];W[ks];B[js]
;W[iq]C[Black is short of liberties.])
(;B[gs]C[This also faiils.];W[ir];B[hr];W[js];B[ks];W[jq];B[iq]
;W[ls]C[Black is in a snap-back.])))
