(;GM[1]FF[4]SZ[19]
GN[Atari!]
PC[http://senseis.xmp.net/?LongestLadderProblem/Solution]AP[GoWiki:2009]
DT[2009-04-22]
C[Diagram from http://senseis.xmp.net/?LongestLadderProblem/Solution

Atari!]
PL[W]

AB[aa][ba][ca][da][ea][fa][ga][ha][ia][ja][ka][la][ma][na][oa][pa][qa][ra][sa][ab][sb][ac][cc][dc][ec][fc][gc][hc][ic][jc][kc][lc][mc][nc][oc][pc][qc][sc][ad][cd][qd][sd][ae][ce][ee][fe][ge][ie][je][ke][le][me][ne][oe][qe][se][af][cf][ef][gf][if][of][qf][sf][ag][cg][eg][gg][ig][kg][lg][mg][ng][og][qg][sg][ah][ch][eh][gh][ih][kh][qh][sh][ai][ci][ei][gi][ii][ki][li][mi][ni][oi][qi][si][aj][cj][ej][gj][ij][oj][qj][sj][ak][ck][ek][gk][ik][lk][mk][ok][qk][sk][al][cl][el][gl][il][kl][ol][ql][sl][am][cm][em][gm][im][km][mm][om][qm][sm][an][bn][cn][en][gn][in][kn][on][qn][sn][eo][go][ho][io][ko][lo][mo][no][oo][qo][so][ap][bp][cp][ep][qp][sp][cq][eq][fq][gq][hq][iq][jq][kq][lq][mq][nq][oq][pq][qq][sq][cr][sr][cs][ds][es][fs][gs][hs][is][js][ks][ls][ms][ns][os][ps][qs][rs][ss]
AW[bb][cb][db][eb][fb][gb][hb][ib][jb][kb][lb][mb][nb][ob][pb][qb][rb][bc][rc][bd][dd][ed][fd][gd][hd][id][jd][kd][ld][md][nd][od][pd][rd][be][de][he][pe][re][bf][df][ff][hf][jf][kf][lf][mf][nf][pf][rf][bg][dg][fg][hg][jg][pg][rg][bh][dh][fh][hh][jh][lh][mh][nh][oh][ph][rh][bi][di][fi][hi][ji][pi][ri][bj][dj][fj][hj][jj][kj][lj][mj][nj][pj][rj][bk][dk][fk][hk][jk][nk][pk][rk][bl][dl][fl][hl][jl][nl][pl][rl][bm][dm][fm][hm][jm][lm][nm][pm][rm][dn][fn][hn][jn][ln][mn][nn][pn][rn][ao][bo][co][do][fo][jo][po][ro][dp][fp][gp][hp][ip][jp][kp][lp][mp][np][op][pp][rp][aq][bq][dq][rq][br][dr][er][fr][gr][hr][ir][jr][kr][lr][mr][nr][or][pr][qr][rr][bs]
LB[ml:a]

;W[ll]C[W1]MN[1]
;B[kk]C[B2]MN[2]

;LB[ml:a]
)
