You cannot force a life and death situation upon black, but maybe he will help you.
(
;
FF[4]
GM[1]
SZ[19]
AP[Jago:Version 4.31]
AB[ad][bd][cc][db][bb][fb][gb][fc][ec]
AW[ae][be][ce][cd][dd][dc][ed][fd][gd][gc][hb][ic][eb]
GN[temp]
(
;
W[ea]
(
;
B[da]
(
;
W[bc]
(
;
B[ac]
;
W[ba]
C[RIGHT Lo and behold! If black is stubborn, we get a ko for everything. (black cannot defend both a and b)]
LB[cb:a][ab:b]
)
(
;
B[cb]
C[the best black can do now]
;
W[ab]
;
B[ba]
C[RIGHT a nice grab in sente.]
)
)
(
;
W[ba]
;
B[cb]
(
;
W[bc]
;
B[ab]
C[white can do better]
)
(
;
W[ab]
;
B[bc]
)
)
)
(
;
B[ab]
C[blacks best play.]
;
W[da]
;
B[cb]
(
;
W[ga]
C[RIGHT gote, but nice and fat]
)
(
;
W[fa]
C[RIGHT gote, but nice and fat]
)
)
)
(
;
W[bc]
;
B[ac]
;
W[ea]
;
B[ca]
C[good, but not perfect. white could have gained two more points.]
)
(
;
)
)