(;GM[1]FF[4]SZ[19]
GN[Topping the tree]
PC[http://senseis.xmp.net/?SenseisTeachingLadderGame1About10k]AP[GoWiki:2009]
DT[2009-04-22]
C[Diagram from http://senseis.xmp.net/?SenseisTeachingLadderGame1About10k

Topping the tree]
PL[B]

AB[oc][bd][qd][cf][df][ef][ch][ci][qi][cj][ck][dk][dm][fn][gn][do][fo][cp][bq]
AW[cc][fc][ic][dd][dg][dh][di][gi][dj][ek][el][go][ho][fp][cq][eq][hq][qq][cr]

;B[ii]C[B1]MN[1]

;
)
