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

The ultimate threat]
PL[B]

AB[ea][eb][ac][dc][ec][ad][bd][cd][dd]
AW[ca][da][ab][bb][db][bc][cc]

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

;
)
