(;GM[1]FF[4]SZ[19]
GN[Solution]
PC[http://senseis.xmp.net/?LadderExercise3/Solution]AP[GoWiki:2009]
DT[2009-04-22]
C[Diagram from http://senseis.xmp.net/?LadderExercise3/Solution

Solution]
PL[B]

AB[lc][mc][oc][dd][nd][pd][me][cl][el][em][do][dp][op][qp][rp][dq][jq][pq]
AW[nb][ob][pb][nc][qc][ld][md][qf][pj][ek][pm][cn][co][po][qo][cp][cq][mq]

;B[kd]C[B1]MN[1]
;W[le]C[W2]MN[2]
;B[lf]C[B3]MN[3]
;W[ke]C[W4]MN[4]
;B[je]C[B5]MN[5]
;W[kf]C[W6]MN[6]
;B[kg]C[B7]MN[7]
;W[jf]C[W8]MN[8]
;B[if]C[B9]MN[9]
;W[jg]C[W10]MN[10]

;
)
