(;GM[1]FF[4]SZ[19]
GN[Ahh]
PC[http://senseis.xmp.net/?LadderExercise1/Attempts]AP[GoWiki:2009]
DT[2009-04-22]
C[Diagram from http://senseis.xmp.net/?LadderExercise1/Attempts

Ahh]
PL[W]

AB[eb][gb][bc][cc][dc][fc][bd][hd][pd][he][ie][cf][if][jf][jg][kg][ng][kh][lh][li][mi][pi][qi][ri][nj][oj][lk][nk][pk][qk][nl][pm][qo][kp][qp][oq][pq][or]
AW[fb][ec][cd][dd][ed][id][be][ce][ge][je][hf][kf][pf][ig][lg][jh][mh][ph][di][ki][ni][oi][lj][mj][pj][qj][rj][mk][ok][co][dp][pp][gq][qq][rq][pr][rr][qs]

;W[hc]C[W1]MN[1]
;B[gd]C[B2]MN[2]
;W[gc]C[W3]MN[3]
;B[fd]C[B4]MN[4]

;
)
