(;GM[1]FF[4]CA[UTF-8]AP[CGoban:3]ST[2] RU[Japanese]SZ[19]KM[0.00] PW[White]PB[Black]AW[cc][dc][kc][cd][rd][ce][qe][qf][cg][eg][qg][rg][dh][gh][ih][ki][qj][dk][fk][jk][dl][gl][jl][fm][gm][dn][jn][do][jo][cp][dp][jp][eq][hq][jq][br][dr][fr][hr][ir]AB[ec][ic][mc][qc][rc][dd][fd][pd][qd][de][re][df][rf][ei][fi][gj][ij][ck][gk][ik][cl][fl][il][ql][hm][bn][co][go][io][bp][fp][hp][ip][qp][bq][cq][fq][iq][lq][oq]TR[ei][fi][gj][ij][gk][ik][il][hm][go][io][fp][hp][ip][fq][iq]C[Black to save the marked stones (and win)] (;B[el] (;W[ek] (;B[hl] ;W[hn] (;B[gn] (;W[in]C[CHOICE] ;B[em]C[RIGHT]) (;W[fn]C[CHOICE] ;B[in]C[RIGHT])) (;B[in] ;W[gn])) (;B[hn] ;W[hl] ;B[im] (;W[em]) (;W[fn]))) (;W[em]C[White can also play this way. It's the better way for white to play, but the variations get a little hairy to put into a go problem. Here's a few to browse through.] (;B[hl] ;W[hn] ;B[in] ;W[gn] ;B[ej] ;W[ek] (;B[ci] ;W[cm] ;B[bm] ;W[dj] ;B[di] ;W[cj] ;B[bj] ;W[bk] ;B[bl] ;W[bi] ;B[ak] ;W[bh] ;B[dg] (;W[eh] ;B[ch] ;W[cf] ;B[fh] ;W[fg] ;B[gg] ;W[gf] ;B[hg] ;W[ff] ;B[hf]C[RIGHT]) (;W[ch] (;B[eh] ;W[fg]) (;B[fg] (;W[fh] ;B[eh]C[RIGHT]) (;W[eh] ;B[fh]C[RIGHT])))) (;B[cj] ;W[dj] ;B[di] ;W[ci]) (;B[dj] ;W[cm] ;B[bm] ;W[cj] ;B[ci] ;W[bj] ;B[bk] ;W[bi])) (;B[ej] ;W[ek] ;B[ci] ;W[cm] ;B[bm]))) (;B[hl] ;W[hn] ;B[in] ;W[gn] ;B[dj] ;W[cm] (;B[bm] ;W[cj] ;B[ci] ;W[bj] ;B[bk] ;W[di] ;B[ej] ;W[bi]) (;B[cj] ;W[bm]TR[bn][co][bp][bq][cq]C[Marked stones die, black can't win the game like this.])) (;B[dj] ;W[cm] (;B[cj] ;W[bm]TR[bn][co][bp][bq][cq]C[Marked stones die, black can't win the game like this.]) (;B[bm] ;W[cj] ;B[ci] ;W[bj] (;B[bk] ;W[di] ;B[ej] ;W[bi] ;B[hl] ;W[hn] ;B[in] ;W[gn]) (;B[di] ;W[bl]))) (;B[hn] ;W[hl]) (;B[di] ;W[ci]))