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

Intertwined ladder]
PL[B]

AB[gl][fm][gm][en][fn][in][do][eo][ho][cp][gp][cq][dq][eq][fq]
AW[gk][fl][em][hm][cn][dn][gn][hn][co][fo][go][dp][ep][fp]

;B[hl]C[B1]MN[1]
;W[im]C[W2]MN[2]
;B[el]C[B3]MN[3]

;
)
