(;GM[1]FF[4]SZ[19]
GN[The ladder]
PC[http://senseis.xmp.net/?LadderExercise2/Solution]AP[GoWiki:2009]
DT[2009-04-22]
C[Diagram from http://senseis.xmp.net/?LadderExercise2/Solution

The ladder]
PL[W]

AB[gb][nb][ob][cc][ec][oc][pd][qd][le][df][kf][nf][fg][gg][ig][jg][mg][fh][hh][lh][di][ei][ki][fj][gj][hj][ij][kj][ck][jk][el][jl][cn][po][pq]
AW[lc][nc][gd][nd][od][ce][de][ee][ef][lf][mf][eg][kg][lg][og][eh][gh][ih][jh][kh][fi][gi][hi][ii][ji][jj][kk][gl][kl][cm][dm][km][dp][fp]

;W[me]C[W1]MN[1]
;B[md]C[B2]MN[2]
;W[ne]C[W3]MN[3]
;B[mc]C[B4]MN[4]
;W[oe]C[W5]MN[5]
;B[of]C[B6]MN[6]
;W[pe]C[W7]MN[7]
;B[pf]C[B8]MN[8]
;W[qe]C[W9]MN[9]
;B[re]C[B10]MN[10]

;
)
