(;
AW [ba][cb][bc][cc][dc][ed][gd][ee][fe][bf][cf][df]
AB [ca][da][bb][db][fb][ec][fc][gc][bd][dd][fd][be][de]
C [black to kill white and take the corner.]
(;B[ab] ;W[ac]
(;B[cd] ;W[aa]
(;B[bb] ;W[ae] ;B[ab] C[RIGHT black wins.])
(;B[ab]; W[ae] ;B[bb] C[RIGHT black wins.])
)
(;B[ad] ;W[aa]
(;B[cd] ;W[ce] C[white wins.])
(;B[bb] ;W[ce] C[white wins.])
)
(;B[ae] ;W[af] C[white wins.])
(;B[aa] ;W[ba] C[white wins.])
)
(;B[cd] ;W[ab] C[oops!])
(;B[ac] ;W[ab]
(;B[ae] ;W[af]
(;B[cd] ;W[ad] C[ko. black can do better.])
(;B[ad] ;W[gf] C[white tenuki. white wins.])
(;B[ce] ;W[gf] C[white tenuki. white wins.])
)
(;B[ad] ;W[ce] C[white wins.])
(;B[cd] ;W[ad] C[white wins.])
)
(;B[aa] ;W[ac]
(;B[cd] ;W[ae] C[white wins.])
(;B[ae] ;W[af] C[white wins.])
(;B[ad] ;W[ce] C[white wins.])
)
(;B[ae] ;W[ac]
(;B[aa] ;W[gf] C[white tenuki. white wins.])
(;B[ab]
(;W[af] C[CHOICE]
(;B[cd] ;W[aa] ;B[bb] ;W[ab] C[white wins.])
(;B[aa] ;W[ba] C[white wins.])
)
(;W[aa] C[CHOICE]
(;B[cd] ;W[af] ;B[bb] ;W[ab] C[white wins.])
(;B[bb] ;W[ab] C[white wins.])
(;B[af] ;W[bg] C[white wins.])
)
)
(;B[cd] ;W[ab] C[oops!])
)
(;B[ad] ;W[ac] ;B[ab] ;W[aa] ;B[bb] ;W[ce] C[white wins.])
)