(;GM[1]FF[4]SZ[19]
GN[Two-stage ko]
PC[http://senseis.xmp.net/?HalfPointKo/Discussion]AP[GoWiki:2009]
DT[2009-09-11]
C[Diagram from http://senseis.xmp.net/?HalfPointKo/Discussion

Two-stage ko]
PL[B]

AB[ab][ac][bc][cd][be][de]
AW[aa][ca][da][bb][db][cc][dc][dd]


;
)
