(;GM[1]FF[4]SZ[19]
GN[approach ko]
PC[http://www.go4go.net/]
AP[GoWiki:2009]
DT[2023-12-04]
C[Diagram from http://www.go4go.net/

approach ko]
PL[W]

AB[ca][fa][ga][bb][db][eb][fb][rb][sb][ac][bc][cc][dc][fc][gc][lc][oc][qc][bd][gd][kd][pd][qd][rd][ee][fe][ge][ke][ne][qe][ef][gf][kf][mf][nf][of][pf][dg][eg][gg][jg][lg][mg][qg][rg][gh][hh][ih][jh][ph][ci][di][ei][fi][ii][ji][li][mi][ni][oi][bj][gj][ij][lj][oj][pj][qj][ak][ek][gk][kk][lk][nk][ok][qk][al][cl][el][fl][hl][ll][nl][ql][bm][dm][fm][hm][km][lm][rm][an][en][kn][qn][rn][bo][eo][fo][lo][po][so][ap][bp][cp][dp][kp][lp][pp][qp][bq][eq][fq][jq][kq][lq][oq][pq][ar][fr][lr][nr][or][pr][qr][ds][es][ks][ls][ms][ns][rs]
AW[ba][da][ha][ra][ab][gb][hb][kb][nb][pb][qb][ec][hc][nc][pc][ad][cd][dd][ed][fd][hd][md][nd][od][ae][be][ce][de][he][je][le][me][oe][pe][bf][df][ff][hf][jf][lf][qf][rf][cg][fg][hg][ig][kg][bh][ch][dh][eh][fh][kh][lh][mh][nh][oh][ai][bi][gi][hi][ki][aj][hj][jj][kj][mj][nj][hk][ik][jk][mk][pk][dl][gl][il][kl][ml][ol][pl][gm][jm][mm][nm][pm][qm][bn][cn][fn][gn][hn][jn][ln][mn][pn][co][do][go][jo][ko][mo][oo][qo][ro][ep][fp][gp][jp][mp][op][rp][cq][dq][iq][mq][nq][qq][sq][br][cr][dr][er][gr][ir][jr][kr][mr][rr][bs][js][os]
SQ[os]
LB[sp:a][ss:b]

;W[rl]C[W1]MN[1]
;B[rk]C[B2]MN[2]
;W[ps]C[W3]MN[3]
;B[qs]C[B4]MN[4]
;W[sr]C[W5]MN[5]
;B[ea]C[B6]MN[6]

;SQ[os]
LB[sp:a][ss:b]
)
