(;GM[1]FF[4]SZ[19]
GN[Example (W4 retakes ko)]
PC[http://senseis.xmp.net/?KoThreat]AP[GoWiki:2009]
DT[2009-04-22]
C[Diagram from http://senseis.xmp.net/?KoThreat

Example (W4 retakes ko)]
PL[B]

AB[fi][ej][kj][lj][mj][fk][nk]
AW[gi][ki][li][mi][fj][hj][jj][gk][kk][lk]
CR[fj]

;B[gj]C[B1]MN[1]
;W[mk]C[W2]MN[2]
;B[nj]C[B3]MN[3]

;CR[fj]
)
