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

ladder]
PL[W]

AB[pc][qc][nd][pd][qe][re][rf][qh][rh][qi][ql]
AW[lc][oc][dd][od][qd][rd][pe][pf][qf][pi][pj][qj]
CR[rh]
LB[mb:d][nb:c][pb:m][mc:b][nc:a]

;W[rc]C[W1]MN[1]
;B[ob]C[B2]MN[2]
;W[rb]C[W3]MN[3]
;B[oe]C[B4]MN[4]

;CR[rh]
LB[mb:d][nb:c][pb:m][mc:b][nc:a]
)
