(;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]))