(;GM[1]FF[4]SZ[6]
GN[Black to win]
PC[http://senseis.xmp.net/?KoPreparation]AP[GoWiki:2009]
DT[2018-12-25]
C[Diagram from http://senseis.xmp.net/?KoPreparation

Black to win]
PL[B]

AB[ba][ca][ab][cb][ac][bc][cc][cd][ed][de][ee][fe][ef]
AW[ea][db][fb][dc][ec][fc][bd][dd][ae][be][ce][bf][df]


;
)
