This is a game I played on nova. After 158, White ends up letting Black live, and simultaneously kill his bottom group. As the variations show, I think White may have let me off easily. Is there any way for Black to force life?

_________________
Occupy Babel!

At 139, instead of connecting at e9, atari and squeeze. He can't save those three stones.

After that, in the ko variation(move 163). B.b2, W.b5, B.f3 black captures the f4 string of stones due to a shortage of liberties.